US2048729A - Carton and method - Google Patents

Description

A. O. DALLER Jufly 28, 1936.

CARTON AND METHOD Filed March 12, 1932 4 Sheets-Sheet l' INVENTOR flak/4N 0 04.4419? BY HIS ATTORNEYS July 28, 1936. V A, Q DALLER 2,048,729

CARTON AND METHOD Filed March 12, 1932 4 Sheets-Sheet 2 v INVENTOR AwP/A/v 0 aqua-1e July 28, O D ER 2,048,729

CARTON AND METHOD 4 Sheets-Sheet 3 Filed March 12, 1932 BYH/S ATTORNEYS- M Jul 28, 193%.

A. o. DALLER I 9 CARTON AND METHOD Filed March 12, 1952 4 Sheets-Sheet 4 INVENZ'OR A TTORNEYS Patented July 28, 1936 UNETED STATES new PATENT OFFlCE 2.048.729 t CARTON AND WTHOD Adrian 0. Daller, Dennis Port, Masa, assignor to Dallas Carton C ompany, a corporation of New York Inc., New York, N. Y.,

Application March 12, 1932, Serial No. 598,313

tions, with tabs of greater or less length, which serve for pasting, stapling or interlocking, to secure the carton in its folded condition as such. The size and shape of these tabs has generally been prescribed by the type of carton which is to be made, and it has been found generally impossible to proportion the various tabs so that at the same time successive blanks cut from the same sheet could be accurately interfitted without wastage, and the tabs could be of a minimum Accordingly, it has been almost universal practice to use in the manufacture of cartons more cardboard than is essential to the producmanufacture of boxes used for the merchandizing of crackers, the saving which may be effected by the present invention number of cartons manufaclooking cartons are in many ways unsatisfactory, -particularly because they cannot be made tight.

and unless held together by an external wrapper, are likely to become unfolded at any time, with danger of spilling their contents. This is not' only a disadvantage from the point of view of the packaging for merchandizing, in which it mak 1 a minimum of wastage, and with substantial saving of cost. It is of my invention to provide a carton of this type which may be interfolded with a lining sheet. but which may, nevertheless, be pasted or otherwise secured at its ends to make a tightly closed package. It is also an object of my invention to 25 provide a novel method of interfolding a carton blank and a lining sheet substantially no deterioration until the package is opened.

In the accompanying drawings I have illustrated several preferred embodiments of my invention:

Fig. 1 is a plan view illustrating a preferred type of carton blank and showing specifically one second blank indicated by added lines onthe remaining portion of the sheet;

. Fig. 2 is a similar view of another embodiment of my invention showing adjacent blanks cut, but. not separated;

Fig. 3 is a similar view of still another embodiment:

In Fig. 4 I have illustrated in perspective view a lined carton made by interfolding the blank of Fig; 1 with a lining sheet:

the packing of is also an object 0:

the contents with 35 folded down along found more .21. and 28 are have been secured together.

Fig. 5 is a perspective view showing a carton with the lining folded and sealed;

Fig. 6 is a perspective view showing the carton of Fig. 5 closed and sealed, ready for shipment or storage; and

Fig. '7 is a perspective view showing the carton made from the blank in Fig. 3 before the sealing down of the end flaps.

Referring first to Fig. blank there illustrated consists of a cover portion M, a back portion II, a bottom portion l2, and a front portion I3, all integrally joined together along lines of fold l4, l5, and It. A flapportion I1 is also shown integrally secured to the front edge of the cover portion III, and is adapted to be the line i8. In the front edge and to folding the flap down, as well as in other directions herein specified, it will be understood that the directions are considered as if the blank were actually folded into the form of a carton.

. At side edges is and 20 of the backportion are pasting flaps 2| and 22, and at side edges 22 and 24 of the bottom portions are similar pasting flaps 25 and 25. These flaps need only enough to provide a satisfactory pasting surface. Experience has shown that approximately onehalfof the width of the box is a desirable proportion. In some cases, however, it has been back portions slightly wider than that on the bottom portion. In this case, in order to provide for accurate interiltting and so that adjacent carton blanks may be severed from the sheet along a single line and without the cutting of any narrow wastage strips which might tend'to interfere with the operation of the cutting device, it is preferable that, when placed side by side, the tabs 22 and 26, or 2| and 25, should form a rectangle, the dimensions of which are substantially the width of the bottom l2 and the depth of the back II. In the case illustrated in Fig. 1, since the width and the depth of the carton are equal, the tabs 22 and 26, and 2| and 25, when placed side by side, should form a square.

. Joined to the front portion l3 along the edges end portions 29 and 30. To these end portions fold-in tabs 3| and 32 are joined along the edges 33 and 34. These end portions 22 and are rectangles,

are'the depth of the front section l3 and the width of the bottom section |2, respectively, so

that they cover substantially exactly the end of the carton when the blank is folded.

In the manufacture of the carton from this blank, rectangle folds 2|, 25, and 29 are pasted together, as are also the portions 22, 26, and 30. The carton is then ready for filling, and after filling, the fold-in tabs 2| and 32 are folded at right angles along the lines 22 and 24, the flap i1 is folded at right-angles along the line is, and the cover is folded down along the line H.

' The above folding' operations may be performed by hand, as described, but ordinarily this will be done automatically by machine, the portions being folded around a form, which is removed after the pasting tabs and the end sections In the case in which cardboard is used which has been impregnated or coated with paramn, or other material which becomes adhesive with heat the securing of the pasting tabs to the end sections may be performed merely by the application of heat either to the 1, it will be seen that the referring to.

be large desirable to make the tab on the the dimensions of which are made along the lines, I6, I5, 22, 24, I9, 20, 21, and 28, and the portions.

ends of the form about which the box has been folded, or to a pressure member which presses the end section against said form. Even in the case where an applied adhesive is used, it may be advantageous thus to fold the box about a 5 form and to heat the end sections while pressing them, in order to procure more rapid setting of the adhesive.-

In Fig. 2 I have shown a carton of different dimensions. In this case, the carton is substantially wider than it is high, and with these dimensions, the blanks may be interfltted more satisfactorily if the folding-in tabs in and 32:: secured to the upper edges of the end sections 29a and 20s are positioned longitudinally beyond the .end sections 23a, instead of transversely, as

shown in Fig. 1 ("longitudinally" and transverse herein referring to the sheet of material, that is, the row of blanks cut from said sheet, rather than to the blank itself, or any portion 2 thereof). In this case, as will be observed, the fold-in tabs on the end sections 29a and 200. aresecured to the bottom section |2a, instead of to the front section, and the pasting tabs 25a and 280 are secured to the front section i211. with 5 these changes and the obvious changes of size and proportion, the carton may be substantially the same as that shown in Fig. 1.

In the case of the blank shown in Fig. 2, as with that shown in Fig. 1, the end section with its 30 fold-in tab on one blank is aligned with the cover section of the adjacent blank. Thus the portion of the material which must be cut away from the cover section, because it requires no pasting or fold-in tabs, serves as the fold-in tab 5 and the end sectionof the adjoining blank, and a substantially perfect interfitting is thereby obtained.

In Fig. 3 is shown another type of carton blank in which the cover is provided with folding tabs. In this case the cover tabs 35 and 36 replace the end tabs 2| and 22, except for the addition of these tabs 35 and 36 to the cover section llib and the omission of the fold-intabs Ma and 22a from the end sections 29b and 30b, and for obvious changes in size and proportion, the carton shown in Fig. 3 is, substantially the same as that shown in Fig. 2. In the carton as shown, the cover tabs 25 and 22 are provided with rounded sides to permit the opening and closing of the boxes without tearing of! these tabs. This is particularly adapted for bakers boxes, such as are used for wrapping cakes, rolls, etc., when delivered to the customer. For cartons which are to be sealed atthe factory, it may frequently be preferable to form the tabs 25 and 36 rectangular and substantially the same size as the end sections 23b and 22b. In this case, the tabs 25 and 26b serve as end sections, and may be pasted down over the outside or the inside of the box, 60 and in this case are preferably perforated along the lines 21 'and 22, so that the box. although sealed, maybe readily opened by running ones fingernail, or any sharp instrument along the lines 21 and 22 to sever the end flaps 35 and 36 65 from the cover section lob. If desired, a sealing flap 23 may be provided adjacent the front section |2b, which may be perforated along the line 40 to provide for opening the box. This sealing flap 22 may be used substantially as described 7( and claimed in my co-pending application Serial No. 202,773, filed July 1, 1927.

In Fig. 4, I have shown in perspective a carton: made according to Fig. 1, which is interfolded with a lining sheet, and is ready for scaling to- 71 gether, e. 8., by ing sheet 45 which is to be folded into the carton may be laid over the carton blank, for example, as shown by dotted lines in Fig. 1. The blank, with its superposed lining sheet may then be fed into any suitable folding machine such as are well known at the present time, and the front, back and end sections folded up and together in well known manner. If the lining sheet is of a width such that it extends beyond the ends of the bottom section, only a little more than one-half the width of the end (i. e., the width of the bottom section), the end sections, including the pasting tabs, will have sufficient portions of each exposed to the others to permit satisfactorily securing them together by means of an adhesive, even though the lining material is one like glassine or parafline paper which does not permit of application of the adhesive thereto. Furthermore, if one of the end sections secured to the upright sections (that is the front and back sections) and the end section attached to the bottom section are folded up first and a full end section attached to the other of the upright sections is folded in last, the lining will cover not more than a diagonal half of the full end section as shown in Fig. 4, so that even though the lining sheet be of greater width than that specified above, nevertheless, the carton may be satisfactorily sealed by means of an adhesive.

This folding is preferably performed upon a mandrel which corresponds substantially to the interior size of the carton, and in case a material is used as the lining sheet which is impregnated or coated with an adhesive material such as parafline or resin, etc., the ends of the carton, after folding together as already described, and preferably after the application of some additional adhesive between the directly overlying portions of the end section, may be pressed against the mandrel with application of heat suincient to soften the adhesive material of the lining sheet, and thereby to secure the same in its folded condition, and advantageously to the adjacent faces of the end sections of the carton. Furthermore, in such case, where the lining material comprises an adhesive, it may serve, without application of any additional adhesive, to cement the end sections of the carton together. In this case, it is desirable, rather than otherwise, that the lining sheet should cover as much of the end sections as possible, and in this case it may be desirable to fold together the end sections attached to the two uprights before the end section attached to the bottom is folded up. Ordinarily, however, it is preferable to apply at least some additional adhesive in order that a perfectly sealed end may be obtained.

In Fig. I have illustrated one way of closing the carton and its lining by which the contents may be sealed substantially airtight and moisture-tight. In this case the lining 55, whether interfolded with the carton, for example as illustrated in Fig. 4, or separately folded into bag form and inserted into the assembled carton, is first spread by drawing the upper corners 50 centrally outward from the carton. The sides 5| and 52 are then pressed down to form the triangle folds, as shown in Fig. 6, after which the upper portions surrounding the open top of the bag are folded over and over to form a relatively tight closure 54, and to dispose these edges close along the top of the carton, as shown in Fig. 5. After the lining has been folded as shown in Fig. 5, the projecting triangular portions 5|, 52 may be means of an adhesive. The linfolded over along the lines 55 and 56, together with the fold-in flaps 3| and 32. If it is desired to provide an airtight and moisture-tight seal by means of the lining, the overlapping side edges of the lining are preferably secured together either by an adhesive applied for the purpose, or if the lining is impregnated or coated with an adhesive material such as resin or parafiln, etc.. these edges may be sealed merely by hot-pressing them against a mandrel after folding, e. g., as already described above, after the fold 54 has been formed, and while it is still standing perpendicularly up away from the upper surface of the closed lining, and before it has been folded down against the lining, as shown in Fig. 5. This closure may advantageously be sealed either by means of a separate adhesive, or by an adhesive which is already present in the lining material, and this may be performed either by pressing the fold between parallel plates, or by rolling it between pressure rollers, or in any other desired manner. After the sealing has been effected, the fold may be turned down, as shown in Fig. 5. Of course, if the contents of the package are such as to form a suitable backing, or, for example, if a fiat sheet, e. g., of cardboard, has been placed over the contents placed thereover and against a suitable surface placed beneath the portions 5|, 52.

In Figs. 5 and 6, I have also illustrated a novel method of sealing the carton. cover l0 only along the portions 51 and tions are made readily severable from the remainder of the cover In by means of perforated. or otherwise weakened, lines 59 and 6B.- The tuck-in flap I? may be similarly pasted, or otherwise secured, to the front portion l3 only along the portion 6|, which is made readily severable from l3 by means of a perforated, or otherwise weakened line 62. After the carton has been sealed, e. g., by pasting the portions 51, 58 and 6|, respectively to the flaps 3|, 32, and ll, it may be readily opened by running the thumbnail or any other sharp instrument along the weakened lines so as to sever the pasted portions from the remainder of he cover I 0 and the front l3. Thereupon the tuck-in flap I! may be withdrawn from behind the front I3, and the cover It may be opened to expose the contents. Nevertheless, the carton is not destroyed nor injured, and the tuckin flap I! may be again inserted back of the cover l3 to re-close the box. This type of carton is within the-scope of my copending application Serial No. 202,773, referred to above.

Although in the above I have described the folding of these cartons so as to leave them open along the cover, with the ends sealed, it is to be understood that the cartons made according to my invention may be first closed at one end and along the top, and the other end may be left open for filling the carton, and closed after the filling. If end filling in this manner is desired, the carton should preferably be made according to the invention claimed in my co-pending application, Serial No. 202,773, filed July 1, 1927, that is, by providing a perforated portion either on the end of the cover flap ll, or on or extending from the front section l3, in the latter case, the removable sealing portion may advantageously take the form of a tab connected to the front section it along a invention, and the principle thereof, without in any sense limiting the invention to the forms D specified.

What I claim is:

1'. The method of forming a lined carton which comprises forming a blank comprising bottom, front, back and end sections, an end section being adjacent each end of the bottom, front and back sections, one of the end sections at each-end on the upright sections being a full end section substantially the same size as the end of the carton, laying upon such blank a lining sheet of width sufficient to cover the full length of the bottom section, and at least a part of the end sections; folding up the front and back sections with the lining sheet thereon; folding together at each end of the carton two of the three end sections, each with so much of the lining sheet as remains thereon to interlock said lining sheet and said end sections, said lining sheet being of a width such that it extends beyond the ends of the bottom section only a little more than half of the width of the full end sections, whereby the interfolded portion of the lining will leave a. substantial width of said end section completely uncovered and free to engage the other end sections directly through the adhesive, and folding last of all the said full end sections and securing said end sections together by means of an adhesive.

2. The method of forming a lined carton which comprises forming a blank comprising bottom, front, back and end sections, an end section being adjacent each end of the bottom, front and back sections, the end sections at each end on the bottom section being a full end section substantially the same size as the end of the carton, laying upon such blank a lining sheet of width sufiicient to cover the full length of the bottom section, and at least a part of the end sections; folding up the front and back sections of the carton with the superposed portions of the lining sheet: folding together the end sections on the front and back sections, each with the portion of the lining sheet which remains superposed thereon, and thereafter folding up a full end section on the bottom section and securing it to the others by an adhe 3. A lined carton comprising front, bottom, back and cover sections, all integral and each having integrally joined thereto an end section, a lining sheet covering the inner sides of said front, back and bottom sections, and at least a part of said end sections, said end sections being folded together at each end, and portions of the lining material being folded between and interlocked with the end sections, one of said end sections being substantially the full size of the end of the carton, and being folded outside of the others, and all of said end sections being secured 5 together by an adhesive.

4. A lined carton comprising front, bottom. back and cover sections, all integral and each having integrally joined thereto an end section,

a lining sheet covering the inner sides of said 10 front, back and bottom sections, and at least a part of said end sections, said end sections being folded together at each end, and portions of the lining material being folded between and interlocked with the end sections, one of said end sec- 16 tions being substantially the full size of the end of the carton, and being folded outside of the others, and all of said end sections being secured together by an adhesive, said material being adhesive at superatmospheric temperature, and said no adhesive within the interfolded end portions serving to secure together the interfolded end sections of the carton and portions of the lining sheet engaged therebetween.

5. A sealed package comprising a carton, a bag-like lining interfolded and interlocked in said carton, the upper edges of said lining being extended parallel to the front of said carton to bring them together along their entire length,

and the top of said bag being sealed by folding along a line substantially parallel to the upper edge of the front of said carton and being secured in said folded condition.

6. The method of sealing a lined carton having a bag-like lining therein and lateral fold-in flaps,

which comprises extending the top edges of said bag centrally outward over said flaps so as to draw the upper portion of the bag together, forming triangle folds along the flaps between the sides of the bag and the centrally extended edge, and folding down to the top of the package the upper portion of said bag which has been drawn together whereby to form a closure on said bag, folding in the flaps together with the overlying triangle portions of the folded lining and closing said carton. 1 g

7. The method of sealing a lined carton having a bag-like lining therein and lateral fold-in flaps, which comprises extending the top edges of said bag centrally outward over said flaps so as to draw the upper portion of the bag together, forming triangle folds along the flaps between the sides of the bag and the centrally-extended edge. folding down to the top of the package the upper portion of saidbag which has been drawn together whereby to form a closure on said bag, folding in the flaps together with the overlying triangle portions of the folded lining and closing said carton, there being an adhesive associated with said lining whereby the folded top of said 60 bag-like lining is sealed.

ADRIAN o. mum.

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