US3212678A

US3212678A - Pressurized containers

Info

Publication number: US3212678A
Application number: US221265A
Authority: US
Inventors: Floyd W Blanchard
Original assignee: Individual
Current assignee: Individual
Priority date: 1962-09-04
Filing date: 1962-09-04
Publication date: 1965-10-19
Anticipated expiration: 1982-10-19

Description

Oct. 19, 1965 F. w. BLANCHARD 3,212,673

PRESSURIZED CONTAINERS Filed Sept. 4, 1962 2 Sheets-Sheet 1 INVENTOR FLOYD W. BLANCHARD F|G.8 BY ma AT TORNE Y Oct. 19, 1965 F, w. BLANCHARD PRESSURIZED CONTAINERS 2 Sheets-Sheet 2 Filed Sept. 4, 1962 INVENTOR. FLOYD W. BLANCHARD BY F 5 ATTORNEY FIG. I8

United States Patent 3,212,678 PRESSURIZED CONTAINERS Floyd W. Blanchard, 2334 Lorna Vista Place, Los Angeles, Calif. Filed Sept. 4, 1962, Ser. No. 221,265 19 Claims. (Cl. 22295) This invention relates to the art of dispensing materials from containers by a pressure from within the container and more particularly to such containers which are pressurized by installing their closure caps.

Conventional pressurized, dispensing-type containers usually derive their pressure from a media which may be intermixed with the contents of the container as a liquid and which vaporizes to replace the pressurized gas ejected during dispensing, thereby maintaining pressurization. While generally satisfactory, this type of dispensing container does have certain draw backs. Certain articles to be dispensed from the container cannot be mixed with a dispensing gas, the container must be initially charged with a propelling fluid or gas and is not recharged in use and the media employed to generate the gas is relatively expensive.

The various embodiments of the present invention, on the other hand, overcome these draw backs by employing air as the media, by providing, for those materials which cannot be mixed with air, positive displacementtype containers wherein air is injected into a portion of the container which is separated from the material to be dispensed by a piston, diaphragm, or collapsible liner, and by providing a container which is recharged each time it is used by merely replacing its closure cap.

In view of the foregoing factors and conditions characteristic of conventional dispensing devices of the type described, it is a primary object of the present invention to provide a new and useful dispensing device not subject to the disadvantages enumerated above and having means especially designed for pressurizing the dispensing device after each use of the device.

Another object of the invention is to provide a con tainer having a single chamber wherein a dispensing gas and a material to be dispensed are intermixed in a common chamber which is charged each time the closure cap is placed on the container.

Yet another object of the invention is to provide a pressurized, material dispenser which may be pressurized with a dispensing gas by installing the cover on the dispenser and wherein the material to be dispensed is separated from the dispensing gas by a piston, diaphragm or collapsible liner.

A further object of the invention is to provide an improved seal for a pressurized, material dispenser.

A still further object of the invention is to provide a closure cap for a pressurized material dispenser which pressurizes the dispenser each time the cap is placed thereon.

Another object of the invention is to provide a pres surized material dispenser which has a bellows-type closure member which may be squeezed to compress air and pressurize the dispenser each time it is placed on the container.

Another object of the invention is to provide an improved valve for a pressurized material dispenser.

Another object of the invention is to provide a pressurized, roll-on type dispenser.

A still further object of the invention is to provide a pressurized material dispenser having a valve and brush combination in which the valve is opened when the brush is applied to a surface and dispenses material directly into the brush.

Another object of the invention is to provide a ball- I 3,212,678 Patented Oct. 19, 1965 point pen which is pressurized each time the pen is used.

These and other objects will appear upon reading the following specification and claims and upon considering in connection therewith the attached drawings to which they relate.

Referring now to the drawings in which presently preferred embodiments of the invention are illustrated:

FIGURE 1 is a longitudinal cross-sectional view of a first embodiment of the invention wherein a collapsible tube having a brush-type applicator is housed within a casing which is pressurized each time a closure cap is placed on the casing;

FIGURE 2 is a cross-sectional view, on an enlarged scale, of a detail of construction of the device of FIG- URE 1 taken from the area enclosed in circle 2;

FIGURE 3 is a longitudinal, cross-sectional view of a second embodiment of the invention wherein a dispensing device is pressurized below a piston by admitting air at the bottom of the container each time the closure cap is placed thereon;

FIGURE 4 is a cross-sectional view, on an enlarged scale, of a detail of construction of the device of FIG- URE 3 taken from the area enclosed in circle 4;

FIGURE 5 is a longitudinal, cross-sectional view of a third embodiment of the invention wherein the closure cap pressurizes a dispensing container below a piston by admitting air at the top of the container;

FIGURE 6 is a longitudinal, cross-sectional, partial view of a fourth embodiment of the invention wherein a valve is dislodged to dispense fluid from the container each time a brush-type applicator is applied to a surface to be painted;

FIGURE 7 is a cross-sectional view of a portion of the device of FIGURE 6 showing the valve in its displaced position;

FIGURE 8 is a longitudinal, cross-sectional, partial view of a modified valve and seal arrangement which may be employed with a pressurized container of the invention;

FIGURE 9 is a cross-sectional, partial view of a roll-on type dispenser;

FIGURE 10 is a cross-sectional view of a combined check valve and dispensing valve of the invention;

FIGURE 11 is a plan view taken in the direction of the arrows along line 11-11 of FIGURE 10;

FIGURE 12 is a cross-sectional View of the valve of FIGURE 10 in its operative position;

FIGURE 13 is a plan view taken in the direction of the arrows along line 1313 of FIGURE 12;

FIGURE 14 is a vertical, cross-sectional view, partly in elevation, of a fifth embodiment of the invention wherein a table mounted holder is employed which pressurizes a condiment dispenser each time it is placed therein;

FIGURE 15 is a vertical, cross-sectional view of a modified table holder;

FIGURE 16 is a vertical, cross-sectional view, partly in elevation, showing the table holder of FIGURE 15 in use;

FIGURE 17 is an enlarged cross-sectional view of av detail of construction of the table holder of FIGURE 16 taken from the area enclosed by the circle 17;

FIGURE 18 is a longitudinal, cross-sectional View of a ball-point pen of the invention;

FIGURE 19 is an enlarged sectional view of the tip of the combined check valve and dispensing valve of FIGURES 10-13;

FIGURE 20 is a sectional view of a modified form of the valve of FIGURE 19; and

FIGURE 21 is a sectional view of another modification of the valve of FIGURE 19.

Referring again to the drawings and more particularly to FIGURES 1 and 2, the material dispenser constituting the first embodiment of the present invention, generally designated 10, includes an outer casing or housing 12 in which is mounted a collapsible container 14 having a flexible, encompassing sidewall 15, a closed bottom wall 16 and an integral resilient head portion -17. The head 17 includes a valve seat 18, an outlet port 19, an inner, annular lip 20, and an outer annular lip 22 and a hollow, cylindrical tip portion 23. A dispensing valve 24 includes a valve stem 25 and is mounted in the head 17 in such a manner that the valve 24 seats on the valve seat 18 and the valve stem 25 is gripped by the resilient head 17 to retain the valve 24 in position against the valve seat 18. An applicating brush 26 is secured within the cylindrical tip portion 23 by means of a band 27. The outer, annular lip 22 extends beyond the outer casing 12 and includes an air inlet port 28. The head 17 is secured in position in the casing 12 by means of an inturned flange 29 at the upper end of the casing.

An impervious closure cap 30 has an annular groove 31 on its inner wall at its midsection and pressurizes the casing 12 when it is slid into position thereon. The closure cap 30 is shown only partially on and if high pressure is desired may be of sufiicient length to encase the full length of the container 12. The outer, annular lip 22 serves as a seal compressing air within the cap as it is slipped down over the casing 12. The pressurized air enters the air inlet port 28 and depresses the inner, annular lip 20, as shown in FIGURE 2, permitting air to flow between the walls of the casing 12 and the liner '14, thereby pressurizing the casing -12 and compressing the collapsible container 14 about any material which may be stored therein. The inner annular lip serves as a check valve permitting the air to enter but preventing it from flowing from the casing 12. The closure cap 30 is retained in position on the casing 12 by the outer, annular lip 22 which engages the annular groove 31. The annular groove 31 may also be sized with respect to the lip 22 so as to permit .air trapped in the cap to flow out around the annular lip 22 thereby depressurizing the cap in the closed position. When the cap 30 is installed, the outer, annular lip 22 serves as a wiper cleaning the inner wall of the cap 30 of any material deposited thereon by the brush 26.

Material may be dispensed from the collapsible container 14 by removing the cap 30 and applying the brush 26 to a surface to be painted. This distorts the outlet port 19 so that it relaxes its grip on the valve stem displacing the valve 24 from its valve seat 18 so that the material will flow from the container 14 through the outlet port 19 and the cylindrical tip portion 23 into the brush 26. The casing :12 is pressurized again when the cap is replaced after each use of the brush 26.

Referring now to FIGURES 3 and 4, a material dispenser 35 comprising the second embodiment of the invention includes a cylindrical container 36 having an encompassing sidewall 37, a closed bottom 38 and an open top with an inturned flange 39. A flexible, flaptype check valve 40 is mounted in the bottom of the container 36 adjacent an air inlet port 41, which, in turn, is mounted in the sidewall 37. A flexible, material dispensing head 42 which includes an inner, annular lip 43, valve seat 44, a discharge port 45, and an outer, annular lip 46, is mounted in the open top of container 36 and its retained in position by the flange 39. A valve 47 includes a stem 48 which is mounted in the discharge port 45 in such a manner that the valve 47 seats on the valve seat 44. The stem 48 frictionally engages the inner wall of the port 45 to retain the valve 47 against its seat 44. A brush-type applicator 49 is identical to the brush 26 shown in FIGURE 1 and will not be further described. A rigid piston 50 is slidably mounted inside the container 36 above the air inlet port 41 and seals the space below the piston from the space above so that air entering port 4 41 will not mix with material stored in container 36 above the piston 50.

A closure cap 51 has an encompassing sidewall 52, a closed bottom 53 and an open top 54. An annular collar 55 includes an annular channel 56 and is an integral part of the open top 54. A resilient sealing ring 57 is mounted in the channel 56. When the cap 51 is slid over the container 36, the sealing ring 57 is compressed and prevents air from escaping from within the cap 51. Compressed air from within the cap 51 is released into the container 36 through the air inlet port 41 when the resilient seal 57 passes thereby. The air pressure is sufiicient to (118- place the check valve 40, as shown in FIGURE 4, permitting air to flow into the container 36 below the piston 50. The compressed air will pressurize the container 36 below the piston 50 causing it to move upwardly within the container 36 against the material to be dispensed, therefrom. Material is dispensed from the container 36 by removing the cap 51 and exerting a thrust on the s de of the brush 49 thereby distorting the Walls of the d1s= charge port 45 so that the valve 47 is unseated.

Referring now to FIGURE 5, a material dispenser 60 comprises the third embodiment of the invention and includes an outer cylindrical container 61 having an encompassing sidewall 62, a closed bottom 63 and an inturned, annular flange 64. A resilient, material dispensing head 65 has an inner, annular lip 66 engaging one side of the flange 64 and an outer, annular lip 67 engaging the other side of the flange 64. A tubular member 68 depends from the dispensing head 65 into the container 61 and includes an open bottom 69 which is disposed superjacent the bottom wall 63. A rigid piston 70 is slidably mounted in the tubular member 68 near the bottom thereof. Material to be dispensed from the tubular member 68 may be stored in the tubular member 68 above the piston 70. Piston 70 fits Within tubular member 68 with an air tight seal to prevent intermixing of air with material stored above the piston.

The material dispensing head 65 also includes a valve seat 71, a material outlet port 72, a hollow, cylindrical tip portion 73 and an air inlet port 74. A valve 75 includes a valve stem 76 which is frictionally mounted in the material outlet port 72 in such a manner that the valve 75 seats on the valve seat 71. An applicator brush 78 is mounted in the hollow tip portion 73 in the same manner as the brush 26 in FIGURE 1.

A closure cap 79 includes an annular groove 80 at its mid-portion and pressurizes the container 61 below the piston 70 whenever it is put on the container 61 by means of the outer, annular lip 67 engaging the inner Wall of the closure cap 79 and compressing air therein which flows under pressure through the air inlet port 74 into the container 61, between the encompassing sidewall 62 of the container 61 and the encompassing sidewall 81 of the tubular member 68, and into the open end 69 below the piston 70.

Referring now to FIGURES 6 and 7, the fourth embodiment of the invention constitutes a special applicator 85 which is designed for use with fingernail polish and other materials having a solvent which adversely affects resilient dispensing heads of the type employed in the other embodiments of the invention. A solvent resistant head, on the other hand, is too rigid to become deformed by a side thrust on the brush; therefore, a special dispensing valve is employed. The applicator 85 includes a cylindrical container 86 having an encompassing sidewall 87, a closed bottom 88 and an open end with an inturned flange 89. A dispensing head 90 includes an inner, annular collar 91 having a shoulder 92 which engages the flange 89 and an outer, annular lip 93 which is of greater diameter than the container 86 and which also engages the flange 89 to retain the head 90 in position in the open end of the container 86. The dispensing head 98 also includes an air inlet port 94 which is covered by an annular, flapper-type valve 95. The valve 95 also serves as a seat 96 for a valve 97 having a valve stem 98. The dispensing head 90 also includes a cylindrical tip portion 90:: having a hollow, outer end portion 99a and an inner, outlet passageway 99 in which the stem 98 is mounted. The valve 97 is retained in a seated position by means of a disc 100 which is rigidly affixed to the valve stem 98 in such a manner that it engages the outer end of the outlet passageway 99. A shaft 101 is mounted on the end of the valve stem 98 and extends beyond the hollow, outer end portion 99a. A hollow brush 102 encompasses the shaft 101 and is aflixed to the inner wall of the end portion 99a by means of a collar 103.

A cylindrical closure cap 105 includes an internally threaded portion 106 adapted to engage external threads 107 on the container 86. The closure cap 105 has a slightly smaller inside diameter than the diameter of the annular lip 93 so that the lip 93 forms a seal preventing air from escaping from the cap 105 when it is slid over the lip 93. Thus, pressure builds up Within the cap 105 and flows through the air inlet port 94 into the container 86. The flap valve 95 serves as a check valve to prevent air from flowing out of the container 86 through the air inlet port 94.

In use, the cap 105 is removed from the container 86 and the brush 102 is applied to a surface to be painted in such a manner that the shaft 101 also contacts the surface to be painted and tips the valve 97 off its valve seat 96, permitting material to flow from the container 86 through the passageway 99 and into the brush 102.

Referring now to FIGURE 8, a modified valving and sealing arrangement is shown wherein a resilient ring 110 encompasses a cylindrical container 111 and prevents air from flowing out the open end of a closure cap 112 when it is slid onto the container 111. The container 111 includes a closed bottom wall 113 and an apertured head portion 114. An annular valve seat 115 of resilient material is mounted inside the head portion 114 and includes an aperture 116 which accommodates the valve stem 117 of a dispensing valve 118. The dispensing valve 118 has a fluid conducting passageway 119 bored into the stem 117 which communicates with an aperture 120 adjacent the valve head 121. A compression spring 122 encompasses the valve stem 117 and has one end seated in a spring seat 123 in the head portion 114. The other end of the spring 122 bears against a ring 124 holding a brush 125 onto the valve stem 117. The bias of the spring 122 is such that air pressure building up within the cap 112 as it is placed on the container 111 unseats the valve 118 permitting air to flow through the fluid conducting passageway 119, out the aperture 120 and into the container 111. When it is desirable to prevent air entering the fluid conducting passageway 119 the bias of the spring is increased so that the air pressure building up in the cap does not unseat the valve 118 but, acting on the larger area of the annular valve seat 115, moves it away from the head portion 114 permitting air to flow between the valve stem 117 and the head portion 114 then between the valve seat 115 and the head portion 114 into the container 111. When the cap 112 is removed, material may be dispensed from the container 111 by tipping the valve oh: its seat 115 by exerting a sideward thrust on the valve stem 117. Material within the container 111 will then flow out through the aperture 120, the fluid conducting passageway 119 and the brush 125.

Although brushes have been shown on the discharge end of all of the embodiments of the invention shown in FIGURES l-8 for purposes of illustration, but not of limitation, it will be readily understood by those skilled in the art that dispensing nozzles of various types may be used in place of the brushes.

Referring now to FIGURE 9, a roll-on type dispenser 130 is shown wherein a cylindrical container 131 has an encompassing sidewall7132, a closed bottom 133 and an open top with an inturned flange 134. An applicator head 135 includes an annular collar 136 having a shoulder 137 which engages the inturned flange 134 and an outer, an-

6 nular lip 138 which is of larger diameter than the con tainer 131. The applicator head also includes a socket 139 in which a ball 140 is loosely mounted. The socket 139 includes a valve seat 141 against which the ball 140 seats from pressure within the container 131. The socket 139 also includes radial grooves 142 which communicate with fluid outlet ports 143. When a closure cap, which may be identical with the closure cap 30 shown in FIG- URE 8, is placed on the container 131, the outer, annular lip 138 engages the sidewalls of the closure cap compressing air therein. Air under pressure then unseats the ball 140 permitting air to flow in between the valve seat 141 and the ball 140, along the radial grooves 142, through the ports 143 and into the container 131 pressurizing it.

In use, the ball 140 is unseated by applying it to the surface to be treated with the material from within the container 131. Assuming the container 131 to be pressurized, the material from within the container will flow under pressure out through the outlet ports 143, and along the radial grooves 142, thereby applying material to the lower surface of the ball 140. As the ball 140 is rolled along a surface to be treated, the material from the lower surface of the ball will come in contact with the surface to be treated.

Referring now to FIGURES 10-13, a combination check valve and dispensing valve 145 is shown. A container 146, which may be identical with any of the containers of the other embodiments of the invention, includes an inturned flange 147. A dispensing head 148 is mounted in the flanged end of the container 146 and includes an annular collar 149 having a shoulder 150 which engages the under surface of the annular flange 147. The head 148 also includes an outer, annular lip 151 which engages the outer rim of the container 146. The dispensing head 148 is made of a resilient material and the combination discharge orifice and check valve 145 is formed in the end of the dispensing head 148 by cutting one or more slits 152 therein, as shown in FIGURE 11. When a closure cap, not shown, but which may be similar to the closure cap shown in FIGURE 6, is placed on the container 146, the outer, annular lip 151 will engage the inner surface of the cap, pressurizing the cap and air under pressure will deform the resilient slits 152 permitting air to flow under pressure into the container 146. When it is desired to dispense material from the container 146, the dispensing head 148 may be deflected with a sideward thrust thereby deforming the slits 152 creating a discharge orifice in the end of the discharge head 148, as shown in FIGURES 12 and 13. A thrust at any point on the dispensing head 148 will deform at least one of the slits 152. If a single slit is used, the dispensing head should be deflected at an end point of the slit in order to create a discharge orifice.

The valve action of the slits, when subjected to a pressure differential across the wall of the dispensing head, is due to the configuration of the wall pierced by the slits. FIGURE 19 is an enlarged section of the tip of the combined check valve and dispensing valve 145 of FIGURES 10-13 in which the slits 152 pierce the wall on the apex of an inwardly projecting cone 188. When a higher pressure is external to the dispensing head 148, it acts on the concave surface of the cone 188 to open the slits 152. When a higher pressure is internal to the dispensing head 148 it acts on the convex surface of the cone 188 to squeeze the opposing lips of the slits 152 together to form a positive pressure tight seal. FIGURE 20 illustrates an alternate design of a dispenser 145a in which the cone 188 of FIGURE 19 is replaced by an inwardly projecting cylindrical passage 190 which may also receive the shank end of a brush, not shown, to form a brush applicator. Pressure on the outside of the dispenser 145a opens the slits 152b and pressure on the outer perimeter of the cylindrical passage 190 inside the container 146 closes the slits 15217. FIGURE 21 illustrates another alternate design in which the slits 15% are closed by a pressure differential in either direction across the dispenser head walls 191.

When a higher pressure is external to the dispensing head it acts against the walls 191 to squeeze the slits 152b closed, despite the small force tending to open the slits 152b resulting from the external pressure acting on the shallow flow passage 192. When a higher pressure is internal to the dispensing head 145b, it acts on the solid projecting part 193 to squeeze the slits 152k closed.

Referring now to FIGURE 14, a table mounted dispenser 160 is shown and this embodiment of the invention may be employed for dispensing condiments such as catchup and the like. The dispenser 160 includes a container 161 having a dispensing head 162 of the type shown in FIGURES 1013. The dispenser 168 is mounted in a stand 163 which may be placed on a counter or a table. The stand 163 includes a base portion 164, an upstanding, cylindrical sidewall 165 and a closure cap portion 166. The portion 166 corresponds in size and shape to the neck 167 of the container 161. When the container 161 is placed into the holder 163, the rim of the dispensing head 162 will contact the sidewalls of the closure cap portion 166 whereby air will be compressed and flow under pressure into the container 161 through the dispensing head 162. Material may be dispensed from the container 161 by distorting the head 162 in the manner shown in FIGURES 12 and 13 for the head 148. It is desirable that the stand 163 have sufficient weight to prevent it from being lifted from the table as the container 161 is withdrawn.

Referring now to FIGURES 15 through 17, a modified table-type dispenser 170 is shown wherein the holder 171 includes a bellows-type bulb 172. A container 173 having a discharge head 174, which may be identical with the discharge head shown in FIGURES 10-13 is adapted to engage the bellows 172 when the container 173 is inserted into the holder 171 and depresses the bellows 172 sufficiently to pump air into the container 173 through the discharge head 174. A resilient ring 175 is mounted at the upper end of the bellows 172 and engages the outer surface of the container 173 to form an air seal 50 that air will be trapped within the bellows 172 when the container 173 is inserted thereinto. Air flows through the head 174, into the container 173 which may be retained in position in the holder 171 against the pressure exerted by the bellows 172 by means of a bracket 176, which may be an integral part of the holder 171.

Referring now .to FIGURE 18, a ballpoint pen is shown having a conventional ballpoint pen refill cartridge 181 which may be filled with ink. The cartridge 181 is mounted in a casing 182 having an air inlet aperture 183 at its end remote from the writing end of the pen. The pen 180 also includes a cap member 184 which is adapted to cover the point of the pen when the pen is not in use and which may be placed on the apertured end of the pen, as shown. The cap 184 includes a sealing member 185 comprising a resilient ring which engages the sidewalls of the casing 182 and compresses air within the cap 184 which flows through the aperture 183 into the ballpoint pen 181. The pen will remain pressurized only as long as the cap 184 remains in place on the apertured end. The cap 184 is maintained in position on the apertured end of the pen against the force of the compressed air by means of an inturned flange 185 on the cap 184 which engages an annular groove 186 on the casing 182, The casing 182 is tapered, as shown, to prevent the injection of air into the cartridge 181 when the cap 184 is placed on the point-end of casing 182. It is desirable that the cartridge 181 fit the casing 182 with suflicient closeness at 187 to ,form a seal therebetween.

While the particular embodiments of the invention herein shown and described in detail are fully capable of attaining the objects and providing the advantages hereinbefore stated, it is to be understood that they are merely illustrative of the presently preferred embodiments of the invention and that no limitations are intended to the details of construction, or design herein shown other than as defined in the appended claims.

I claim:

1. A self-pressurizing material dispenser comprising:

a container adapted to store a material under pressure;

flow passage means in communication with said container for controlling the flow of said material from said container and controlling the flow of pressurizing gas into said container, said flow passage means including a normally closed element for preventing flow of said material from said container when it is pressurized and another element for controlling the flow of said pressurizing gas into said container; and

a closure member for said container, said closure member being adapted to inject said pressurizing gas into said container through said another element of said flow passage means as said closure member is being placed in an effectively gas tight assembled relation with said container, said pressurizing gas pressurizing said material so that the material will flow from said container through said normally closed element of said flow passage means when said normally closed element is opened.

2. The dispenser of claim 1 wherein said flow passage means comprises:

a cylindrical body portion;

a conical nose portion; and

a slit-type aperture mounted in said nose portion.

3. The dispenser of claim 1 wherein said flow passage means comprises:

a material dispensing head mounted on said container and having a valved passageway communicating with the material to be dispensed;

a brush connected to said dispensing head, said brush including a material discharge port communicating with said valved passageway; and

a flap-type check valve in communication with said container.

4. The dispenser of claim 1 wherein said flow passage means comprises:

a material dispensing head mounted on said container and having a ball socket communicating with the material to be dispensed, said ball socket including an annular valve seat;

a ball loosely mounted in said ball socket in such a manner that said ball seats against said valve seat when said container is pressurized; and

a gas inlet aperture provided in said dispensing head subjacent said ball for admitting said pressurizing gas when said ball is unseated by placing said closure member in assembled relation with said container.

5. The dispenser of claim 1 wherein said closure member comprises:

a closure cap adapted to compress air and admit it into said container as said cap is slid onto said container.

6. The dispenser of claim 1 wherein said closure member comprises:

a container supporting member adapted to have air compressed therein when said container is assembled with said supporting member.

7. A self-pressurizing material dispenser comprising:

an outer casing having an encompassing sidewall, a closed bottom, and an open top including an annular inturned flange;

an inner, collapsible container mounted in said outer casing and having an encompassing sidewall, a closed bottom and an open top;

a material dispensing head including an inner, annular hp engaging the under surface of said inturned flange, and an outer, annular lip engaging the outer surface of said inturned flange, an annular valve seat, and a material discharge orifice, said dispensing head being connected to the open end of said inner collapsible container in such a manner that said discharge orifice is in fluid communication With the interior of said container;

an air inlet port mounted in said outer, annular lip superjacent said flange; and

a cylindrical closure cap for said casing, said closure cap having an inside diameter slightly smaller than the diameter of said outer, annular lip and including a means for retaining said cap in position on said casing after it has been slid thereon, said outer, annular lip preventing escape of air from said cap as it is slid onto said casing, whereby compressed air flows from said cap through said air inlet port to depress said inner annular lip and flow into said casing to pressurize the outer wall of said collapsible container.

8. A self-pressurizing material dispenser comprising:

a cylindrical container having an encompassing sidewall, an impervious bottom wall, and a flanged open p;

an air inlet port mounted in said sidewall adjacent said bottom wall;

a check valve mounted in said container in such a manner that it covers said air inlet port and permits air to flow into said container while preventing air from flowing from said container out through said port;

a piston mounted in said container above said air inlet port;

a valved, material dispensing head mounted in the flanged end of said container;

an open topped closure cap for said container having an encompassing sidewall, and a closed bottom; and

a resilient sealing ring mounted in said closure cap adjacent its open end, said closure cap being adapted to inject compressed air into said container through said air inlet port when said cap is placed on said container.

9. A self-pressurizing, material dispenser comprising:

a cylindrical casing having an encompassing sidewall,

a closed bottom and a flanged, open top;

a valved material dispensing head mounted in said open top, said head including an air inlet port and a material outlet port;

a tubular member mounted in said casing in spaced relation with the sidewall of said container and in fluid communication with said material outlet port;

a piston slidably mounted in said tubular member; and

a closure cap adapted to pressurize said container below said piston by admitting air through said air inlet port when said closure cap is slid onto said container.

10. The dispenser of claim 1 wherein said flow passage means comprises:

a material dispensing head mounted on said container,

said material dispensing head including a fluid discharge passageway in communication with said container, a valve having a valve stem mounted in said passageway and controlling flow of fluid through said passageway, and a brush encompassing at least a portion of said valve stem and including a fluid discharge aperture in fluid communication with said passageway, said valve stem extending into said brush a suflicient distance that said stem is displaced when said brush is applied to a hard surface in use; and said another element comprising a flap-type check valve in communication with said container for admitting said pressurizing gas to said container.

11. A self-pressurizing material dispenser comprising:

a container adapted to store a material under pressure;

gas inlet means mounted on said container to admit a gas under pressure to pressurize said material;

a dispensing valve mounted on said container for controlling the discharge of said material therefrom, said valve being normally closed to prevent material from flowing from said container when it is pressurized; and

a closure member for said container, said closure member being adapted to inject said gas under pressure 16 into said container through said gas inlet means as said closure member is being placed in an effectively gas tight assembled relation with said container.

12. A self-pressurizing material dispenser comprising:

a container adapted to store a material to be dispensed;

gas inlet means mounted on said container to admit a gas under pressure into said container and prevent flow of gas from said container;

a dispensing valve mounted on said container for controlling the discharge of said material therefrom;

a piston slidably mounted in said container intermediate said gas inlet means and said dispensing valve; and

a closure member adapted to pressurize said container through said gas inlet means when assembled to said container.

13. The dispenser of claim 11 including also an impervious collapsible bag mounted in said container for storing said material, said gas inlet means being in fluid communication with one side of said bag and said dispensing valve being in fluid communication with the other side of said bag, said bag being collapsed by gas pressure to discharge said material from said bag when said valve is opened.

14. The dispenser of claim 11 including also means mounted in said container for dividing it into first and second chambers, said gas inlet means being in fluid communication with one chamber and said dispensing valve being in fluid communication with the other chamber.

15. The dispenser of claim 11 wherein said dispensing valve and said gas inlet means comprises a single, dual purpose valve.

16. The dispenser of claim 11 wherein said gas inlet means comprises a flap-type valve mounted inside said container.

17. A pressurized material dispenser comprising:

a pressurizable container having an open top;

a cap for said container to cover said open top;

a valve seat mounted in said open top;

a valve assembly having a valve and a hollow valve stem, said valve assembly being mounted in said open top in such a manner that said valve seats on said seat inside said container and said valve stem extends through said open top to the outside of said container;

a compression spring connected to said valve stem and said container in such a manner that said valve is biased into seating relation with said seat;

port means placing said hollow valve stem in communication with said container intermediate said valve and said seat; and

a brush connected to said valve stem outside said container, said brush being in communication with said container through said valve stem, said container being pressurized with air through said valve assembly when said cap is slid onto said container over said valve assembly.

18. A self-pressurizing ballpoint pen comprising:

a casing having an open end; orifice means provided in said casing for admitting a pressurizing gas into said casing;

a ballpoint pen member mounted in said casing, said member having a writing element at one end and an opening at the other end, said writing element extending out through said open end of said casing in sealed relation therewith, said open end of said member being in fluid communication with said orifice means; and

cap means for covering said writing element when said pen is not in use and for injecting said pressurizing gas into said casing through said orifice means when said cap means is placed in an effectively gas tight assembled relation with said casing, whereby said gas will pressurize said ballpoint pen member.

19. A self-pressurizing material dispenser comprising:

a container adapted to store a material under pressure;

flow passagemeans in communication with said container for controlling the flow of said material from said container and controlling the flow of pressurizing gas into said container, said flow passage means including inlet means for controlling the flow of pressurizing gas into said container to pressurize said material and normally closed outlet means for controlling the fiow of said material out of said container; and

:a closure member for said container, said closure member being adapted to inject said pressurizing gas into said container through said inlet means of said flow passage means as said closure member is being placed in an effectively gas tight assembled relation With said container, said pressurizing gas pressurizing said material so that the material will flow from said container through said outlet means of said flow passage means when said normally closed outlet means is opened.

References Cited by the Examiner UNITED STATES PATENTS Hartman 222-575 X West et al. 222-193 Nagely 15-581 Lesquendieu 222-95 Cimbura et al 222-193 Catlin 137-525.1 St. Germain.

Seymour 222-569 X Altseimer 222-389 RotWein 137-5253 X Fillmore 15-572 Canada.

LOUIS J. DEMBO, Primary Examiner. LAVERNE D. GEIGER, EVERETT W. KIRBY,

Examiners.

Claims

1. A SELF-PRESSURIZING MATERIAL DISPENSER COMPRISING: A CONTAINER ADAPTED TO STORE A MATERIAL UNDER PRESSURE; FLOW PASSAGE MEANS IN COMMUNICATION WITH SAID CONTAINER FOR CONTROLLING THE FLOW OF SAID MATERIAL FROM SAID CONTAINER AND CONTROLLING THE FLOW OF PRESSURIZING GAS INTO SAID CONTAINER, SAID FLOW PASSAGE MEANS INCLUDING A NORMALLY CLOSED ELEMENT FOR PREVENTING FLOW OF SAID MATERIAL FROM SAID CONTAINER WHEN IT IS PRESSURIZED AND ANOTHER ELEMENT FOR CONTROLLING THE FLOW OF SAID PRESSURIZING GAS INTO SAID CONTAINER; AND A CLOSURE MEMBER FOR SAID CONTAINER, SAID CLOSURE MEMBER BEING ADAPTED TO INJECT SAID PRESSURIZING GAS INTO SAID CONTAINER THROUGH SAID ANOTHER ELEMENT OF SAID FLOW PASSAGE MEANS AS SAID CLOSURE MEMBER IS BEING PLACED IN AN EFFECTIVELY GAS TIGHT ASSEMBLED RELATION WITH SAID CONTAINER, SAID PRESSURIZING GAS PRESSURIZING SAID MATERIAL SO THAT THE MATERIAL WILL FLOW FROM SAID CONTAINER THROUGH SAID NORMALLY CLOSED ELEMENT OF SAID FLOW PASSAGE MEANS WHEN SAID NORMALLY CLOSED ELEMENT IS OPENED.