CN1142830C - Apparatus for spraying liquids, and disposable containers and liners suitable for use therewith - Google Patents

Abstract

A spray gun(1)has a fluid reservoir(11)which contains a removable liner(13). The liner(13), which may be thermo/vacuum-formed from a plastics material, is a close fit within the interior of the reservoir and collapses as fluid is withdrawn from within the liner during operation of the gun. Preferably, the liner has a comparatively-rigid base and is capable of standing, unsupported, outside the reservoir. The side walls of the liner are preferably thin in comparison to the base and can be collapsed for disposal of the liner. The reservoir(11)has a removable lid(15)and is capable of standing, inverted, on its own so that it can be filled with fluid. The lid(15)also functions to secure the liner(13)in the reservoir and, at the end of a spraying operation, the lid(15)and the liner(13)are removed together from the reservoir(11)and discarded, thereby simplifying the cleaning of the spray gun.

Description

The spray gun that spraying liquid is used

The present invention relates to container, disposable container especially, and relate to can be as the container of liner.The invention still further relates to the apparatus (for example, spray gun) that spraying liquid is used, the liquid container of especially this apparatus or basin.

Disposable container has many purposes in many different field.For example, many article are enclosed in the disposable container (as bag) before or after buying.When this disposable container was a kind of polybag, purchaser often was used as another storage tank once more with this bag, as the disposable liner as a waste material bucket.In some cases, make disposable liner specially and be used for other the storage tank that re-uses: under those situations, this liner can be used to help to abandon the content (as the situation of the liner in a waste material bucket) of this storage tank; Protect this storage tank or content wherein; Or help, even exempted cleaning to this storage tank.

After using, help the cleaning of storage tank and prevent material the container by the aspect that remnants polluted of other material, mix within it or in to adorn a kind of be particularly advantageous for using a liner in the storage tank of the material that resembles glue, paint or the plaster of paris that uses.Must for example clean the storage tank of mixing or interior dress in it, not change painting color or quality to guarantee other trace materials for the paint that uses.As mentioned above, when a vehicle needs the lacquer of oil spout again, and when this paint and original the sort of color of paint were matched, this was even more important.To pollute in order when mixing paint, preventing to produce, in the car body workshop, usually to use disposable paraffin paper cup as mixer, especially all the more so when only needing small amounts of paint.At United States Patent (USP) A-4, the another kind of way of 383,635 li propositions comprises provides a kind of disposable container, this disposable container to be contained in the frame storage tank that can re-use for using.

In the spray gun field, because a variety of causes proposed: in the basin of this kind spray gun, should use a disposable liner (to see U.S. Pat-A-3,211,324,3,255,972,4,151,929,4,951,875 and 5,143,294 and European patent EP-A-0678334).Generally to the spray gun of spraying liquid (as paint, horticultural chemistry product etc.) usefulness than being familiar with, it generally includes the basin and of adorning pending liquid in one distributes this liquid by it under pressure under plate machine mechanism control nozzle.This liquid can be sent from this basin under gravity, and/or it also can be carried at a kind of flow of compressed fluid of giving spray gun from an external source, in air or current.

Want to change the liquid in the basin of a spray gun as a user, cleaning spray gun very up hill and dale usually, with guarantee not have the old liquid residue of trace in spray gun to pollute new liq.This situation is particularly useful for paint sprayer, because any old paint that remains in the original allotment in the spray gun can make a collection of painting color of newly joining be affected the degree that can not re-use.Often requiring just problem to have taken place in the car body workshop that coated paint wants strict and existing painting coincide.Perhaps, in spray gun, done, will peel off and pollute new deployed paint as paint residue.But cleaning spray gun is a job comparatively complicated and consuming time.In addition, under the paint sprayer situation, cleaning will be used relatively large solvent, and these solvents should be processed carefully for the reason of environmental protection and be discarded.Can increase the spending of paintwork like this, again greatly.The someone advises: (promptly as see that above-mentioned European patent EP-A-0678334) uses a disposable liner in the oil tank of a spray gun; Can simplify the cleaning of spray gun like this, and reduce required quantity of solvent.

The invention provides a kind of spray gun, this spray gun comprises: a fluid slot; The one detachable and liner that can be folded, its shape is consistent with the shape of the inwall of this groove before injecting fluid to this inside liner, and it fits tightly on the inwall of this groove; And one distributes the nozzle from the fluid of this inside liner.Wherein, in this spray gun operating period, when fluid this liner when this inside liner is discharged is just folded up.

Point out about the title " folding " according to the sidewall of one container of the present invention/liner as used herein: this sidewall can be out of shape like this, causing under the situation that is applied in middle pressure (being hand pressure), the edge portion of this container can be by towards the bottom pushing of this container and sidewall is not destroyed.

Be used to comprise the material that paints class that contains of form of ownership in this title " paint ", use the spray gun can be with these material coateds to a surface, no matter whether these materials will be to this surface colours.This title for example comprises priming paint, base coating, varnish and similar material.

Just to illustrating, will consult all accompanying drawings below and describe all embodiment of the present invention.Wherein:

Figure 1A and Figure 1B represent the stereogram of the spray gun of prior art, and wherein Figure 1A illustrates the lid that is removed, and the lid of the spray gun shown in Figure 1B is removed, can pour into paint inwardly;

Fig. 2 is all parts of oil tank of another kind of form of expressing the spray gun of Figure 1A and Figure 1B with decomposing state;

Fig. 3 has represented the oil tank for the Fig. 2 that assembles, and has the joint of this oil tank of connection and a spray gun;

Fig. 4 is by the oil tank of Fig. 3 and the longitudinal sectional drawing of joint;

Fig. 5 has represented the oil tank of Fig. 4 of being connected with a spray gun;

Fig. 6 is illustrated in the oil tank of the Fig. 4 that is using on the spray gun;

All parts of the oil tank of Fig. 4 that Fig. 7 is removed after representing to use;

Fig. 8 and Fig. 2 are similar, but have represented a kind of oil tank of modification;

Fig. 9 is Fig. 2 to 4 and the longitudinal sectional drawing of the lid of the another kind of shape of the oil tank of Fig. 8;

Figure 10 and Fig. 2 are similar, have represented another kind of amended oil tank;

Figure 11 is the longitudinal sectional drawing by the part of the canister of Figure 10;

Figure 12 has represented and the similar spray gun shown in Figure 1A and Figure 1B, but its canister is another kind of form;

Figure 13 has represented to have the spray gun shown in Figure 2 of the canister of a modification;

Figure 14 expresses the modification to the canister of the spray gun of Fig. 3;

Figure 15 and Fig. 3 are similar, have represented the canister of another form;

Figure 16 and 17 has represented two kinds of modification of the element of Figure 15;

Figure 18 has represented to be used for the use of a carriage of the canister of Figure 15;

Figure 19 is the stereogram according to one liner of the present invention/container;

Figure 20 is a similar view, be presented as abandon and with it liner/container after folding;

Figure 21 (a) to (c) is a kind of schematic diagram of method of a liner of producing the canister that is used for Fig. 2 to 4 and Figure 10;

Figure 22 has represented the modification of the method for Figure 21;

Figure 23 has represented that a paint mixes water bottle (pitcher); And

Figure 24 has represented a kind of according to the present invention, the liner that is used in combination with the water bottle of Figure 23.

Figure 1A and Figure 1B have represented a kind of paint sprayer of typical prior art of gravity feeding type.This spray gun 1 comprises that a rifle body 2, a handle 3 and that extends from the rear end of rifle body are positioned at the nozzle 4 of the front end of rifle body downwards.Spray gun is installed in a trigger 5 manual operations on the sidepiece of this spray gun by a pivotally.The top that the canister for the treatment of the paint of being emitted by spray gun or similar material or paint kettle 6 are positioned at rifle body 2 is housed in it, and be communicated with a compressed air channel (cannot see among the figure), this passage passes the rifle body from a joint 7 that is positioned at the lower end of handle 3 and extends to nozzle 4.During use, joint 7 is connected in a compressed air source (not shown), and like this, when the user spurred trigger 5, compressed air was just delivered to nozzle 4 by rifle, and is carrying under gravity the paint of sending here from paint kettle 6 and making it atomizing.Then, paint just utilizes compressed air to spray from nozzle 4 as spraying.

The paint Chang Yaoyong hand that is contained in the paint kettle 6 mixes (needing an other container, as a kettle) for this reason, after this pours in the paint kettle again.For guaranteeing in paint, to damage undesirable particle of the shiny surface quality on the surface of being painted, often paint can be poured in the paint kettle 6 by a filter without any meeting.Express purpose for this reason among the figure and will paint the lid 8 of kettle 6 and lay down, other has a conical filter 9 roughly to be positioned on the open end of this paint kettle.Illustrated this filter 9 is disposable conical filters of a known type.This filter has the side of atresia and is positioned at a screen pack part 10 of the point of cone.After in this paint 6, pouring into paint, take off filter 9 and it is abandoned, again pot lid 8 is covered.As filter 9 are the filters that can re-use, and then as spray gun, are using different liquid (for example, a kind of paint of different colours, or a kind of liquid with different chemical compositions) should thoroughly clean before.

Fig. 2 has represented all assemblies of the paint kettle 11 of another kind of form, and this paint kettle 11 can replace paint kettle 6 to be used on the spray gun shown in Figure 1A and Figure 1B 1 (or any similar spray gun).Information slip is shown among Fig. 3 and Fig. 4 (profile) after the assembling of the paint kettle 11 of this another kind of form.

Paint kettle 11 comprises an open container 12, and the size of this container is similar with comparing of a kind of hand-held spray guns of prior art, on its bottom an airport 12A is arranged, and is provided with a disposable liner 13.The shape of this liner 13 is corresponding to the inwall of (and being closely tied in) container 12, and at open end one narrow edge 14 arranged, and this edge 14 is positioned on the top margin of container.This container 12 also has a sucking fit in the disposable lid 15 of the opening end of liner 13.This lid 15 has a centre bore 16 (see figure 4)s, extends a tube connector 17 from this hole, is provided with outside extension 18 at an end of this tube connector 17, to form the part that a bayonet socket connects.A topped screen pack 19 on the hole 16, but this screen pack sucking fit is in this hole or make one of globality part of lid 15.Lid 15 can be screwed to a circumferential band 20 on the top that is pressed in lid on the container with hand, firmly it is in place.

By using the joint 21 that separates with the paint kettle shown in Fig. 3 and (profile) Fig. 4 this canister 11 can be connected in spray gun 1.This joint 21 is tube-like pieces, and 22 inner another part that form the bayonet socket connection in the one end are to be connected in the tube connector 17 of paint kettle 11.In the other end 23, the shape of this joint can match with the shape that spray gun paints the standard connector (being generally a screw thread) of kettle.

The shape of the liner 13 of the paint kettle of having mentioned 11 is corresponding to the inwall of container 12, and in the top edge that is positioned at container one narrow edge 14 arranged at opening end.As described below, this liner is self-supporting, but also collapsible, and a harder bottom 13A and thin sidewall 13B are preferably arranged, and like this, when when folding, being the folding rather than bottom by sidewall with it, realizes longitudinally folding.In addition, these liner 13 aptychus, ripple, seam, joint or node, and do not have groove in the internal connection of sidewall 13B and bottom 13A yet.After this will consult the liner that Figure 19 and 20 describes the sort of type in greater detail.What also will describe below is the thermoforming process that can produce such liner by this.

The container 12 of paint kettle 11 is made as polyethylene or polypropylene by a kind of plastics, can make translucent (as shown in Figure 2) or opaque, and can be made into any suitable dimensions.In order will to be used in combination with a paint spray, although as can be with other container dimensional when needing, energy use capacity is 250,500 or 800 milliliters a container usually.The also available a kind of plastics of lid 15 are made as polyethylene or polypropylene, and available a kind of injection molding and forming technology makes.This lid can be translucent or opaque, also can be with color.Hoop 20 can be a forming plastic element, or is machined metal (as an aluminium) element.Joint 21 can be a frame worker hardware, can for example be formed from aluminium and carry out anodized.

To paint kettle 11 in order making, joint 21 to be connected (in the end 23) and put in place in spray gun.Then, will paint kettle 11 as shown in Figure 2 and unload, again liner 13 will be inserted in the container 12.Then paint is put into this container, shifted lid 15 onto position, will bind round again and tighten downwards so that lid is held in place.The top of liner 13 then is sandwiched between lid 15 and the container 12, between liner apical margin 14 is sandwiched in the top margin of container and binds round 20 (as shown in Figure 4).Advantageously, be formed with many hangnails (can't see among the figure) on the surface of lid 15, to cooperate and to maintain the top of liner.Then, this spray gun 1 is come from its normal operating position inversion, make the end of tube connector 17 can be connected in joint 21 (as shown in Figure 5), after this, again spray gun is rotated back into its normal operation position (as shown in Figure 6), so just prepare with regard to all for having used by common mode.When paint is driven away from liner 13,, fall down with regard to the sidewall that makes liner because the pressure in the liner reduces.The harder bottom of liner maintains its shape, like this, liner will subside along the longitudinal rather than laterally, becomes bag shape and is left on possibility in this liner thereby reduced paint.

The user before being chosen in this spray gun 1 of operation takes out the air in the liner 13, although this is not crucial.But this has increased the inclination angle scope really, and this spray gun will be worked satisfactorily in this scope, and this is because the danger that does not have air to enter spray gun from paint kettle 11.In order to take out air for 13 li, should start the trigger 5 of spray gun and spray gun still is in position shown in Figure 5 from liner.

After the use, when wanting cleaning spray gun, spray gun can be inverted once more, and be started trigger tout court, the paint in the spray gun is recovered to the inside liner in the paint kettle 11.Then, can lay down paint kettle 11 from spray gun by unload tube connector 17 from joint 21 (it is stayed on the spray gun all the time).Unload hoop 20 from container 12, pull out lid 15 then, the liner 13 that will subside is simultaneously taken (as shown in Figure 7) together out of.Lose lid (comprising filter 19) and liner, stay container 12 and hoop 20 is cleaned, wait that load onto can be for reusing behind a peace and quiet liner and the lid.Only there is spray gun itself to need to clean, so just significantly reduced the quantity of solvent of using.The danger that untapped paint overflows from paint kettle 11 has also reduced, and this is because abandoned liner 13 lid 15 to be put into the position.In addition, because liner is dropped under a kind of collapsed mode, also just changes little and collect the required space size of being used of liner.

As mentioned above, because liner 13 accurately is matched with within the container 12 wall and a smooth inner surface arranged, just can be in container 12 itself and container mixing paint that need not be other.Like that, can avoid cleaning, the quantity of solvent that will use with further minimizing to other mixer.When use during with the gravity feeding type spray gun of a traditional paint kettle (shown in Figure 1A and Figure 1B), just there has not been the sort of possibility, because the two ends of the paint kettle of this moment are uncovered.The instrument perforation of mixed paint usefulness or the possibility of infringement liner 13 become minimum, at first this is because liner accurately is matched with wall within the container 12, secondly because the self supporting type characteristic (following will the description) of liner means unlikely being stowed at internal tank in mixing painting process all around.For helping that container 12 is mixed seven container as one, can on the lateral wall of this container 12, do high scale mark 25 (shown in Fig. 2 and 3), so that determine the amount of content in this container.The shape roughly of container 12 and the especially smooth bottom and this situation of stability thereof when it is in as shown in Figure 2 orientation are particularly suitable for as a mixer it, and the translucence of this above-mentioned container also is favourable in this.But, if this container 12 is opaque, can on sidewall, form many slits, can see liner 13 by these slits, so that at any time make the user of spray gun estimate the amount of the paint in the paint kettle 11.

When mixing paint in container 12, the undesirable particle during adding screen pack 19 can prevent to paint on container lid 15 enters spray gun.But, when paint quality when coarse, perhaps, as in another storage tank, mixing and when be sent to the container 12 of liner, once be filtered, if or the pollutant in painting when unimportant, can omit this screen pack.

Although the hoop 20 of aforesaid paint kettle 11 is independent parts, it also can combine with lid 15, also belongs to disposable part in such cases.As a kind of further version, lid 15 (in conjunction with tube connector 17 and screen pack 19) can form a globality part of liner 13, and available one hinge 26 shown in Figure 8 links to each other with it.Under the sort of situation, lid needn't be matched with within the mouth of liner, lid and liner can be drawn off together from container after use guaranteeing; But,, then be essential if after use, still require lid is held in place at inside liner.Also have as another version, hoop 20 can be got by a belt and replace the jail and bind round around the top of paint kettle 11, so that lid 15 and liner 13 are held in place.This belt can bind round on paint kettle 11 in the jail, and for example can form with rubber, or the part of the sort of ferrule device at the top of conduct jail hoop cylinder and bottle.

As require between the lid of Fig. 2 to 4 and liner 13, to have more reliably and cooperate, lid can be a kind of closely cooperating (snap fit) rather than sucking fit as shown in the figure with liner.Liner can for example form the internal-rib of an inner periphery direction, and its position be able to be matched with in the corresponding groove on the adjacently situated surfaces of lid.

Change form as another, this push-in type lid 15 can be replaced by a lid 27 with form as shown in Figure 9.This lid 27 also be sucking fit within liner, but it generally is conical, and the shape of its upper end 28 is corresponding to the shape of the end of the tube connector shown in Fig. 2 to 4 17, like this, it can be matched with identical joint 21.This lid 27 has a flange 29 and the forming section 29A that will cooperate with the inner surface of liner on the top of outer edge 14 that extend, that can be located in liner on one day.The shape of this forming section 29A allows lid 27 to be pushed into the mouth of liner, and is provided with the recess 29B that the limit of a liner can touch, and lid is located securely.But, the form of forming section shown in Figure 9 not right and wrong it does not belong to, can adopt multiple version, comprise the hangnail that the lid 15 of for example consulting Fig. 4 was described in the above.That screws on by a screw thread can keep lid 27 to put in place with hoop 20 similar hoops on container, this hoop will be located on the top of flange 29 of lid.Lid 27 can comprise one with the filter 19 similar filters of Fig. 2 to 5.Perhaps, in each case, the shape of filter can roughly be made cylindrical, makes it can insert the tubular portion of lid from that end with bayonet socket junction vicinity.The shaping of the inside of the tubular portion of lid should be guaranteed when spray gun this filter to be held in place under the sort of situation.

Figure 10 expresses all elements of a kind of version of paint kettle 30.The same with the paint kettle 11 of Fig. 2, this paint kettle 30 comprises a container 12 and a liner 13.But in this case, the filter 19 of paint kettle 11 forms an independent element 31, and this element 31 has a diameter suitable with the diameter of container 12 and comprises a seal washer 32 along circumference.In addition, the lid 15 of the paint kettle of Fig. 2 and hoop 20 are roughly conical lid 33 by one and replace, this lid 33 be threaded engagement on container, and tube connector 17 similar tubulose extensions 34 among a shape and Fig. 3 are arranged in the top, make it can be coupled to identical joint 21.By liner 13 is pushed within the container 12, after pouring paint into this container, filter 31 is placed on the top of this container then, and lid is twisted so that filter 31 fixedly positioning downwards, just will paint kettle 30 and assemble.The edge 14 of liner 13 and the seal washer 32 of filter 31 all are sandwiched between lid 33 and the container 12 (as shown in figure 11) subsequently, thereby can prevent to spill paint from paint kettle 30 when the paint kettle is fixed on a spray gun and comes their inversions for use.

By form screw thread on the end of the tubular portion 17,34 of the lid of container 11,30, like this, they just can directly be coupled to the standard paint kettle jockey on the spray gun 1, connect joint 21 thereby save.

Figure 12 has represented a kind of spray gun that changes design, the paint kettle 6 of the standard of spray gun 1 wherein has been retained (seeing Figure 1A and Figure 1B), and be provided with one and be matched with the liner 35 of paint within the kettle, and preferably extend into the junction with the rifle body 2 of spray gun, and by for example using the flexible O shape circle (can't see) between spray gun and this liner to form fluid-tight sealing with rifle body 2 from figure.At this moment, liner 35 can not subside when paint is removed (spending) from the paint kettle, and this liner 35 can be made to help that it is positioned in the paint kettle 6 by a kind of harder material relatively.In case put in place, this liner 35 is held in place by a lid 8 that is screwed in downwards on the outward extending edge 36 of open end of liner.The paint kettle 6 of Figure 12 is additional to be provided with one and to be roughly conical filter 37, and this filter is all made by screen material, and it is positioned at liner 35 in use.Filter 37 has an outward extending edge 38 as liner 35, and this edge 38 is positioned on the top at edge 36 of liner, and is held in place by the lid 8 of paint kettle 6 equally.

Do not resemble the paint kettle 11 of Fig. 3, the paint kettle 12 of Figure 12 waits to be poured into paint, links to each other with spray gun 1 simultaneously.Liner 35 and filter 37 are put into the position, in the paint kettle, pour into paint, close the lid again.In this operating period, there is not filter to be moved the danger of position, because filter all made by screen material, so the user can see the paint liquid level all the time when painting pouring in the paint kettle.This moment, spray gun can use.All paint that distributed by spray gun pass through filter 37, therefore, needn't make filtration treatment to paint again when paint pours into paint kettle 6.After the use, can unload filter 37 and liner 35 after unloading lower cover 8.Liner 35 is lost, and filter 37 also can be lost, and also can be cleaned, and this depends on whether it is disposable.The use of liner 35 has reduced the required quantity of solvent of cleaning spray gun 1 again, as uses 37 of the disposable filters further to reduce quantity of solvent.

Filter 37 desirable any suitable shapes for example can have the side of fluting, to increase the effective surface area of filter.

In a plan of establishment of revising shown in Figure 13, liner 35 synthesizes a unit 39 with filter 37.At this moment, filter and liner are abandoned together.

In each plan of establishment shown in Figure 12 and 13, liner 35 and filter 37 can discharge from paint kettle 6 with lid 8.In the time of like that, can replace traditional lid 8, lid 8, liner 35 and filter 37 are dropped together with a disposable lid.

Disposable unit 39 shown in Figure 13 can make an amendment, and makes the paint kettle 6 of its replaceable spray gun 1, and mismatches within the paint kettle.Under the sort of situation, as shown in figure 14, this element 39 can be made one and irritate the sealing drum of having got well paint in it in advance and provide.From external circumstances, sealing filter cylinder 50 is similar to paint kettle 6, and can be connected in spray gun 1 in the same manner.But, because it seals, must on its port of export 51, punch, and for example one blowing air hole is set at its other end, flow in the spray gun to allow paint.For example, can before this Encapsulated filter cartridge (making the port of export occupy highest order) being connected in (inverted) spray gun, the user can punch to this port of export of 50 51.Perhaps, can make an amendment, make when sealing tube 50 is connected in the spray gun and just automatically the port of export 51 is got the hole spray gun 1.Then, after this tube is connected in spray gun, on its other end 52, form a passage, can be manual to that end punching of tube or for example connect an other lid 53, this lid just can be used for sealing drum is punched after this lid being put into.Perhaps, prepare to be formed in advance on the sealing tube when spray gun with regard to all air hole that need be opened when available.

After the use, from spray gun, unload this tube 50 and abandon.Because this tube 50 contains a filter, supplier just can just needn't filter paint and can pour in this tube.But, be to cross in advance to filter as paint, just can save the filter of 50 li in tube.

Figure 15 has represented the form that paint kettle 40 a kind of of a spray gun 1 changed, and this kind paint kettle is whole discardable.Paint kettle 40 is roughly similar with the paint kettle 30 that Figure 10 represents, its difference just container 12 is replaced by the following disposable container 41 that will describe, and has saved liner 13 again.

The container 41 of Figure 15 can be any traditional disposable container that is suitable for interior charge of oil lacquer and is connected in paint pot lid 42.For example, this container 41 can be formed by thin plastics, and preferably translucent plastic (as shown in the figure) enables to see the content of this container, and is preferably in and has mark 43 on the sidewall, can determine the amount of the content of this container.On the bottom of this container, be formed with a blowing air hole 44, can be used in combination other some device in case of necessity, close this airport 44.The shape of that device can be an adhesive tape (not shown), peels it off back and just can open this hole 44, when needs it is pasted up with closed this hole again.Perhaps, a turnover capping or some simple hand operated valve mechanisms also can be set.Container 41 has an external screw thread at its open end, links to each other with lid 42 being used for, and this lid 42 is roughly similar to the lid 33 of Figure 10, and the shape of its upper end 42A is also identical, in order to be connected in a spray gun (time can with a suitable joint) if necessary.The used material of lid 42 can be with container 41 identical, also available as shown in the figure trnaslucent materials.One also extends across the mouth of container 41 for disposable flat screen pack 45.This net 45 can be a discrete item, and remains between lid 42 and the container 41 with around it, perhaps also can form with this lid is whole.

To paint kettle 40 in order making, to unload lid 42 and filter webs 45, and then irritate oil-feed lacquer (take care the passage 44 on this container bottom is closed) for 41 li towards container from container 41.As mentioned above, when paint is poured into container 41, needn't filter, can in this container, mix paint, thereby needing for this purpose avoid another storage tank it.Then, lid 42 and screen pack 45 be put back on the container 41 put in place, lid 42 is connected in (inverted) spray gun 1, spray gun is turned around turn back to its normal position then, opens the passage 44 on the container bottom again.Present then can use this spray gun by common mode.After spraying operation finishes, close passage 44 once more, will paint kettle 40 and pull down and it is abandoned from spray gun 1.Only remaining spray gun is to treat its cleaning.Spray gun 1 can be inverted before the kettle 40 again and be come pulling down paint, and operate the trigger 5 of this spray gun so that left unnecessary paint in spray gun turns back to paints in the kettle.In either case, if any fully paint is left in paint kettle 40, this paint kettle can be sealed (rather than discarding) again and reuse.

Advantageously, the configuration of the container 41 of paint kettle can be subsided it after use.In some cases, lid 42 also can subside.As a kind of version, but the element that lid 42 1 can re-use also can be cleaned with spray gun.Utilize the sort of plan of establishment, disposable container 41 can be irritated in advance the form of having got well paint and cylindrical shell that will it good seal with one and be supplied with, and wherein seals and seals with a lid, and this lid unloaded before container is connected in lid 42 easily.Screen pack 45 can be the disposable element that maybe can re-use.As another version, container 41 and lid 42 can be supplied with one form altogether, the upper end 42A of lid therein lives this tube with a detachable cap seal, can unload this lid before this tube is connected in spray gun.In this kind form, this is similar to the tube 50 of Figure 14.

The suitable selection of size by to the lid 42 of paint kettle 40 can make a stand-by lid be used in combination with the container 41 of different sizes.Then, in each case, the user will choose those containers that can hold the paint of optimum amount.Also wish so to provide the filter 45 of the mesh size that many kinds have different filter screens, can choose the sort of mesh size that is suitable for the filter screen of the sort of paint to be used most to cause this user.For screen pack 45, the form and/or the position that have as shown in figure 15 are not important: for example, it can have a kind of cone shape and/or its exit (as shown in figure 17) that can be positioned at lid 42 as shown in figure 16.Perhaps, as filtration treatment before being poured into container 41 at paint,, then can save filter 45 if perhaps the pollutant that exists in the paint is unessential.

Lid 42 needn't have accurate shape as shown in figure 15, for example can twist combining of box-like hoop with a screw thread as shown in Figure 2 by a push-in type (push-in) lid and be replaced.

When container 41 (having or do not have lid 42) with one in the form of tube of charge of oil lacquer (or other coated material) when providing, in some cases, hope will paint/coating is contained in an inside liner that is folded that seals that is positioned at this.If necessary, also wish paint/coating keep with for example air or light isolation, wait to be coated with on the surface until they are sprayed to.The passage 44 of 41 li in this container can being kept opening all the time then, perhaps, itself is not bubble-tight as container 41, then can save.

Look the shape of container 41 and determine that be desirable to provide a carriage, this container can be contained on this carriage to guarantee that it can not turned over down.A suitable carriage 50 shown in Figure 180 comprises container part 51, the shape of this part is similar to the only more bigger of container 41, and is provided with a bottom 52 of having amplified.Container 41 just is placed in this container part 51 to guarantee that it keeps its erectility when being irritated paint and/or being connected in spray gun 12.

Although what foregoing description related to is paint sprayer, be understandable that: it also is suitable for other all kinds of spray guns, comprises as linking to each other to spray the sort of spray gun as the material of horticultural chemistry product with water tube hose (rather than for air duct).This description also is applicable to suction feeding spray gun (suction-feed gun), promptly when this rifle in use wherein liquid outlet from storage tank be positioned at the top of this storage tank, the effect that relies on the compressed air that flows through this rifle or other band hydraulic fluid is through feed pipe sucking-off liquid from storage tank.Under the sort of situation, when storage tank was provided with a liner, the structure of this liner and/or liquid pushing tube should make liner be folded and can not block liquid pushing tube.For example, available one short liquid pushing tube is taken out all air from liner before using this spray gun.Perhaps, can use a flexible liquid pushing tube, it can be folded with liner.As another version, can use a kind of liner that does not have the remodeling of a rigid bottom, make this liner with the mode different subside (folding) with the liner 13 of Fig. 2.The same with a kind of gravity feeding spray gun, because a kind of storage tank that aspirates the feeding spray gun is not squeezed during use, just can save the passage in storage tank, as long as the permission of the linking part between this storage tank and this spray gun air enters the space between storage tank and the liner.

Turn back to take another look at the paint kettle 11 of Fig. 2 now, and describe liner 13 in detail and produce the method for its usefulness.The liner 13 of expression is preferably transparent respectively in Figure 19 and 20, and by the plastics of a single-piece, is preferably polyethylene or polypropylene, forms through hot-working.The shape of liner has been determined by the interior shape of container 12.Relatively harder bottom 13A is circular, with category within the container 12 seemingly, liner 13 is roughly columniform, but slightly tapered towards bottom 13A from mouth.Similar with the bottom, the rigidity of edge part 14 is also better, but its sidewall 13B is flexible, and as mentioned above, it can be folded.However, liner 13 does not stand on the 13A of bottom with still having support, and its sidewall 13B trails as shown in figure 19 with upright.When liner 13 subsides when being folded, harder bottom 13A keeps its shape relatively, but because folding its edge part 14 towards liner that makes of sidewall 13B moves (as shown in figure 20).The folding mode of sidewall 13B do not break to the similar of a polybag (for example split, tear or broken).

In one form, about 110 millimeters of the height of liner, about 78 millimeters of the diameter of its bottom, and about 86 millimeters of the diameter of its mouth.About 400 microns of the thickness of bottom, about 900 microns of the thickness of edge part 14, about 150 microns of the thickness of sidewall 13B.In another form, liner with at its bottom and the diameter of mouth all with top identical, but about 300 microns of the thickness bottom it, about 200 microns of edge part thickness, about 50 to 250 microns of sidewall thickness.

Consult Figure 21 (a)-(c) below and describe a kind of method that a liner is as shown in figure 19 used of producing.

In the mold pressing frame 61 of a vacuum forming machine with its about 250 millimeters * 250 millimeters of size, thick be that the periphery of 0.5 millimeter low density polyethylene (LDPE) (LDPE) thin plate 60 is clamped.This LDPE material can obtain from the company of the Plastech Extrusions Ltd of Widnes by name in for example Britain Cheshire city on market, and employed vacuum forming machine is " FLB.725 " type machine from the company of the C.R.Clarke andCompany Limited of Ammanford by name of Wales city Carmarthenshire.But, be understandable that: can adopt any suitable plastic, use any suitable heat/vacuum forming machine all can implement this method.

After this thin plate 60 is put into the position, make row's heater 62 of vacuum forming machine move on to position (shown in Figure 21 (a)) on the thin plate, thin plate is heated to a kind ofly is suitable for the soft of vacuum forming and the state of bendable.According to seeing that from the variation to its transparent appearance of milky white this thin plate has arrived this situation of suitable temperature.

Then, remove this row's heater 62, make template 63 direction under the thin plate 60 move, carrying mould 64 it is contacted with this plate so that thin plate along one upward to distortion.At this moment, connect the vavuum pump of this machine under thin plate 60, to take air away.Template 63 continues to move up and arrives the summit of its stroke until this template, and it is sealed in the frame 61 (shown in Figure 21 (b)) of clamping thin plate 60 herein.The shape of mould 64 is consistent with the inner wall shape of the container 12 of spray gun paint kettle 11.

Vavuum pump works on, and formwork seal is in frame 61, and the pressure reduction that forms between the upper and lower both sides of thin plate 60 makes thin plate 60 (it has been contacted with the top of mould 64) downward contact with the both sides of mould 64 (seeing Figure 21 (c)).Then, template 63 is left chilled thin plate 60 and is stayed a mold pressing part 65 with required liner 13 shapes, there is no pleated, ripple, seam, abutment or node, or at any groove of the junction of sidewall 13B and bottom 13A.After this thin plate 60 comes out from frame 61, do deburring to the mouth of the part 65 that is molded and handle, to form the edge part 14 of liner 13.The width of this edge part 14 has just been determined in this position when this step is done the deburring processing to thin plate 60, and can regulate as required.

Know from said method therefore a mold pressing part 65 (be liner 13) is bent, that part of with the sheet plastic 60 of the contact both sides of mould 64 in forming process wherein is compared with that part ofly approaching significantly of contact with the mould holder.This method is different with a traditional vacuum forming technique, the latter's purpose is: the difference on the thickness of words release mold pressing part 65 as possible, for this reason, the step (a) that this technology will be included in Figure 21 puts on air pressure the such additional step in side under the heated thin plate 60 afterwards, cause and be an arch before template 63 is sealed in frame 61: when thin plate contacted with mould 64, its thickness was more even when the step (c) of Figure 21.Usually in method shown in Figure 21, for the thin plate 60 of an intended size, the size of mould 64 is far more than influence to the bottom to the influence of the thickness of final liner 13 both sides.In other words, if the size of mould 64 has increased, the thickness of the bottom of final liner 13 is approximately equal, but the thin thickness of liner both sides many.On the other hand, dwindled, can find to make in the both sides of liner 13 during to a certain value and vertical folding line occurs when the mould size is little as the size of mould.

As require further to reduce the thickness of the contacted that part of thin plate 60 in mould 64 both sides in the step (c) with Figure 21, then when thin plate 60 is sandwiched in the frame 61 of make-up machine, thin plate 60 can be placed between two metal sheets 66 (Figure 22), be provided with a hole 67 in mould 64 positions on the every metallic plate 66, the size in this hole is bigger than the maximum cross section of mould.Also two boards 66 to be clamped in the frame 61, repeat the method for Figure 21 then.The effect of plate 66 is: have only the middle body of thin plate 60 directly to be exposed to all heaters 62 this moment, and (will pass the hole 67 on the plate 66 this moment) thin plate is pulled on the mould 64 when mould 64 moves up.Like that, thin plate 60 be used to the shaping of mold section 65 than small part, the bottom 13A of final liner 13 and edge 14 will be thin slightly, two side 13B is then much thin.The metallic plate 66 that has only used the top as described in Figure 22 also can obtain a comparable result.

As a kind of modification of method shown in Figure 22, sheet plastic 60 can be its periphery and is clamped in a disc-shaped plate between two metallic plates 66.According to the difference of the size of this dish, the periphery that is pressed from both sides can form the edge 14 of liner 13, and also not having excess stock at there need trim.

Be found: when consulting a liner 13 that method that Figure 21 and 22 described produces and be used for the spray gun storage tank of Fig. 2 by one, this liner 13 will subside as illustrated in fig. 20.When liner being subsided during towards the bottom 13A of edge portion 14 directions pushing liner 13 with hand.Also find: liner does not stand upright on the 13A of its bottom with having support usually, although these characteristics are not crucial for use this liner in spray gun storage tank 11, these characteristics also help storing purpose.That liner does not have is pleated, ripple, seam, joint or node, and does not have groove at the interior bonds place of sidewall 13B and bottom 13A: therefore, not having any position in this liner inside can be clamped.Certainly, the bottom 13A of this liner has occupied in some spaces of the bottom of the container 12 of spray gun storage tank 11, so, will be under the circumstances when on the wall of container 12, doing the location of scale mark.

Although the liner 13 of Figure 19 especially use on the paint kettle 11 of Fig. 2 is described, also can other method (time do suitable variation to size) if necessary use same or analogous goods.For example, a kind of goods shown in 19 also can be in many shapes of containers modes different with a spray gun storage tank as a liner.Often be desirable to provide a kind of for example for can keep its cleaning, with the storage tank of a disposable liner, be beneficial to clean and maybe can protect this storage tank or its content.A liner shown in Figure 19 can be used for above-mentioned any purpose, and being particularly suitable to be used in it can be with on all mixing of materials storage tank together, material is trapped and not mixed because do not have any position in this liner inside.

A kind of goods of shown in Figure 19 this for example can be as a liner in the storage tank that mixes paint usefulness in the car body workshop, and in this case, it will provide a kind of attractive variation to design will for the disposable beverage cup that often is used to do this purpose.In the car body workshop to a vehicle by mend spray seven before, maintenance person must mix one in batches with this car around the paint of required color matching in colour of part.Mixing the used various component material of this a collection of paint must accurately measure its capacity and weight, before use they is thoroughly mixed in a suitable storage tank then.Thorough inadequately as mixing, not absolute clean perhaps as storage tank, will influence the color/quality (therefore, also having influence on repair quality) of this batch paint.

For enabling mixing convenient and that paint effectively, a liner as shown in figure 19 can be used with a measuring vessel 70 shown in Figure 23.The shape of this measuring vessel 70 is as a water tumbler, and this water tumbler has a mouth 71 and an one handle 73 in a shaping edge portion 72.On the sidewall of this water tumbler, be provided with many calibrations 74, with the capacity of the content that can measure this water tumbler.The method that Figure 21 has described is consulted in use, can produce the sort of liner as shown in figure 19, accurately to be matched with the inwall of water tumbler 70.By utilizing a kind of like this liner, many component material of a collection of gauging lacquer can be mixed together in this water tumbler 70, and can not touch water tumbler 70.

Figure 24 has represented a kind of liner 75 that uses that is applicable in this water tumbler 70.The shape of this liner 75 is consistent with the shape of the inside of water tumbler 70, total liner shown in Figure 19 13 that is similar to, only dispense the thicker outward extending edge part 14 of liner 13, and the sidewall 76 of this liner 75 comprises a profiled edge 77 consistent with the edge part 72 of water tumbler 70 and mouth 71.Because liner 75 strictnesses are matched with within the water tumbler 70 on the wall, reduce to minimum degree with regard to making when in water tumbler, mixing seven possibility of being puddled the action perforation.In addition, can not hold back seven material, just can not hinder after measuring, being placed on the abundant mixing of all materials in the water tumbler owing to have any position at this inside liner.Pour out (for example, pouring the paint kettle of a spray gun into) after paint is mixed and from this water tumbler 70, just unloads the liner 75 of the folded state that is preferably shown in Figure 20, and it is abandoned it, the just clean water cup 70 that stays is reusing.

Because the bottom 78 of liner 75 has occupied in some spaces of the bottom of water tumbler 70, so all scale marks 74 on the feedwater cup sidewall must be considered this situation when locating.According to the shape of water tumbler 70, wish that also the top that is positioned at water tumbler 75 provides an extension, this extension can be folded back on the edge portion 72 of water tumbler.Otherwise, perhaps in addition, for example wish during use to make liner 75 be sealed in water tumbler 70 by shaping design to some forms of liner and water tumbler, like this, it two can closely match each other at edge part 77 and 72 and be in the same place.

Although wish the liner 75 of water tumbler 70 should be collapsible make after it uses and occupy less space, that neither definitely must it.In addition,, may have such situation because the shape of liner 75 is the interior shapes that are decided by container to be used, that is, this liner can outside this container, have support upright.

Change as another, can be simply will be as shown in figure 19 goods as a container, in this case advantageously: when container is filled with and after this although flexible and the polybag of wall 13B is very nearly the same, all energy does not uprightly have support.This container can be with any suitable size, and adorns many different objects in being used for, and comprises for example powder and liquid, or by simple as a kind of version of supplying with client's plastic bag by the retailer.In each case, the advantage of this container is: the material in it can be held back in no any position in it.Look the difference of the content of this container, wish energy closing containers mouth, the thing of closing of some appropriate formats can be provided in such cases.This close that thing for example can be in the inside of container and around mouth half an inner flange and also be positioned within this container and around second half a mating groove of mouth, it is interior to close this container that inner flange can be pressed into this groove.This wall of flexible other permission of wall 13B is pressed downward moving around content, thereby has reduced the air space in container when needed.

After the use, when needs abandon container, make it to be folded towards flange 14 pushing sidewall 13B, make this container (then being rendered as form shown in Figure 20 this moment) when being dropped, take up space less with hand.As mentioning, sidewall 13B can be folded with the similar mode of a polybag and need not (as by breaking, tear or fragmentation) with its destruction.

Can be understood that: goods shown in Figure 19 have its many other possible purposes.The sort of liner of Figure 19 for example can be used as a liner of a garbage can easily, at this moment, its advantage is that it can better be matched with this inwall compared with a traditional bag shape liner, and because it can stand upright on the 13A of bottom, unloads post processing get up more convenient from hopper so work as it.Some similar liners also can be used on the container of those materials (for example ash, wax or the plaster of paris) faster of hardening of hopper or interior dress: in some cases, material as the plaster of paris is actually to be sold with a batch mixing bucket, in the case, liner can be included in the packing and supply.In some cases, can be suitably with a plurality of each other one be enclosed within another stacked peripherally liner on the throne and be placed on a storage tank inside, like this, another is on the throne after discharging a liner.In addition because this container will comprise a liner, the wall of this storage tank needn't be non-rigid can not, this container for example has the form of a framework to comprise this liner.

Usually, in the sort of goods shown in Figure 19,13A typical thickness in bottom is at least 25 microns, and typical thickness is at least 100 microns.13A compares with the bottom, and the thickness of sidewall 13B is thinned to as being folded to help abandoning the degree of container/liner of describing: the thickness of typical sidewall 13B is less than half of the thickness of bottom 13A, and general can be less than 1/5th of bottom thickness.Look purposes different of the plan of used material and liner/container, the thickness of sidewall 13A is usually less than 250 microns.

For some purposes of as shown in figure 19 the sort of goods, edge part 14 not right and wrong have can not, also can omit (as the liner situation of Figure 24).As not needing edge part 14, to do deburring and handle being close to mold pressing part 65 mouth parts the thin plate 60 among Figure 21 (c) certainly.Find: even omitted the self-supporting characteristic that edge part 14 also can keep liner/container.

Be also noted that: the bottom 13A of the sort of container/liner as shown in figure 19 needs not to be circular and desirable other shape, for example rectangle or triangle.Under the situation of the liner of making a storage tank, if when especially requiring liner to be matched with the inwall of storage tank, the shape of liner is just defined by the shape of this storage tank.In some cases, the bottom needs not to be rigidity.

With what be further appreciated be: have more than the manufacturing of the liner that is limited to the paint kettle that is used for spray gun as Figure 21 and 22 described methods, can be suitable for making the liner/container that is used for other purposes.We will recognize: this method requires mould 64 slightly tapered, and the cross section of its bottom wants maximum (shown in Figure 21 and 22), discharges with permission thin plate 60 when finishing forming operation after.When this method be used to produce one be required to match with wall within the container liner the time, this just requires this container tapered inwardly.This liner/container can be formed one and can not be made by the suitable thermoplastic of the film of material infiltration to be installed by any.In some cases, can wish to use a kind of material that is rendered as a laminate form.For some purposes,, preferably adopt the plastics of low air penetrability as packaging for foodstuff.But, for most of purposes, preferably adopting as polyethylene and polyacrylic polyolefin (polyolefins), this is because they are more cheap, easily hot forming is inertia for most of moisture organic fluids that reach.

Claims (12)

1. spray gun that spraying liquid is used, this spray gun comprises: a fluid slot; The one detachable and liner that can be folded, its shape is consistent with the shape of the inwall of this groove before injecting fluid to this inside liner, and it fits tightly on the inwall of this groove; And one distributes the nozzle from the fluid of this inside liner; Wherein, in this spray gun operating period, when fluid this liner when this inside liner is discharged is just folded up.

2. the spray gun that spraying liquid as claimed in claim 1 is used is characterized in that, comprises that also a setting is used for filtering the detachable filter that flows to the fluid of nozzle from inside liner.

3. the spray gun that spraying liquid as claimed in claim 2 is used is characterized in that filter bits is on storage tank.

4. the spray gun of using as each spraying liquid in above-mentioned all claims is characterized in that comprise a lid, this lid is positioned on the opening of storage tank, and at the periphery of this opening liner is fixed on storage tank.

5. the spray gun of using as the spraying liquid of claim 2 or 3 is characterized in that, comprises a lid, and this lid is positioned on the opening of storage tank, and at the periphery of this opening liner is fixed on storage tank, and wherein, filter can unload from storage tank with lid.

6. the spray gun that spraying liquid as claimed in claim 4 is used is characterized in that the outlet that flows to the fluid of nozzle from inside liner is formed on the lid.

7. the spray gun that spraying liquid as claimed in claim 4 is used is characterized in that liner can unload from storage tank with lid.

8. the spray gun that spraying liquid as claimed in claim 1 is used is characterized in that, this liner by a kind of thermoplastic through heat/vacuum forming; This liner has: a bottom and sidewall, and comparing this bottom with sidewall is hard, this sidewall is folded than Bao Bingneng compared with the bottom; And, a flat outward extending edge part, the shape of this edge part can make this edge part be located on the edge of an opening of this spray gun storage tank.

9. the spray gun that spraying liquid as claimed in claim 8 is used is characterized in that, compares with sidewall, and the edge part of this liner is hard.

10. the spray gun that spraying liquid as claimed in claim 8 is used is characterized in that, this edge part is obviously thicker compared with the sidewall of this liner.

11. the spray gun that spraying liquid as claimed in claim 8 is used is characterized in that, this liner does not stand on this bottom with having support, and its straight wall is on the spot extended.

12. the spray gun that spraying liquid as claimed in claim 8 is used is characterized in that, in this spray gun operating period, when this liner when this inside liner is discharged fluid longitudinal folding along it.

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