US2282207A - Container and method of making the same - Google Patents

Description

May 5, 1942.

F. D. PALMER CONTAINER-AND METHOD OF MAKING THE SAME 2 Sheets-Sheet 1 Filed Jan. 6, 1939 y 4 F; D. PALMER 2,282,207

CONTAINER AND METHOD OF MAKING THE SAME Filed Jan. 6, 1959 2 Shets-Sheet 2 Patented May 5,1942

UNITED- STATES PATENT "OFFICE CONTAI NER F I w I 4 Frank D. Palmer, Chicago, 111., assignor to Kraft Company, a corporation of Delaware Application January 6. 1939, Serial No. 249,566

6 Claims (01. 22961) This invention relates to containers of 'baglike form; to containers made of paper or other sheet material; and to containers having moisture and grease-proof characteristics. The container herein illustrated and described has been particularly designed for packaging granular materials or-the like and especially for packaging materials that are best preserved in a hermetically sealed package, such as, for example, grated cheese, which spoils very rapidly in ordinary pervious containers.

The main objects of the invention are to provide a small-sized container which will be highly impervious to moisture so as to be capable of efl'ectively preserving deterlorable and other materials which tend to spoil upon exposure to air; to provide such a package which may -be easily and quicklymade by automatic machinery and of relatively inexpensive materials so as to be low in cost of production, notwithstanding its lb. The main blank body I is of generally rechigh efliciency as a preserver of food and other materials packaged therein; to 'provide a package of the character indicated which will be easy to open to permit dispensing of the content thereof; and in general, it is the object of the invention to provide an improved package of the character indicated.

Other objects and advantages of the invention will be understood by reference to the following specification and, accompanying drawings (2 sheets), wherein there is illustrated a package or container embodying a selected form of the invention.

In the drawings;

Figure l is a perspective view of a blank for forming a container embodying one form of the invention; 1

Figures 2 to '7, .inclusive, are perspective views, respectively, showing successive steps in the manufactm'e, filling and closing of the container;

Figure 8 is a section on the line 88 of Figure 6;

Figure 9 is a section on the line 9-9 of Figure 7; and

Figure 10 is a section similar to Figure 9 but showing a. modified construction.

Referring now. to the drawings, the completed and closed package is illustrated in Figure 7. As therein shown, the package is of satchel-shape. It is formed from a blank of material shaped as shown in Figure 1 and the blank may be of any suitable kind of sheet material, water-proof either because of its own construction or because of treatment or coating of the material, or it may be of composite form embodying a ply of metal tangular form and it is provided at one end with a lip or tongue 8.

The blank or body member I is provided with a relatively stiff or hard paperboard member 3,

which extends beyond one end of the blank i to form a relatively'stiif lip 8 on'the opposite end of the blank to the lip or tongue 8. The pro,- tective cardboard member 3 is suitably creased .orscored as indicated at 4 to facilitate bending thereof during the shaping of the package, as will appear in the following description.

The protective cardboard member 3 may be secured to the main blank body I by any suitable adhesive material. In the present instance I prefer to employ an adhesive with which the en- 'tire blank may becoated on both sides, the adhesive serving not only to secure certain portions together'for forming the package but also to supply or add to the impervious character of the package. The adhesive coating employed is sorbed by the package content.

preferably of a, thermo=plastic nature, so that the foregoing characteristics of the adhesive are those of a preferred form of adhesive material.

However, any of the available adhesives may be employed with good results...

The cardboard member 3 issuperposed on the blank i and it may be united to the blank by subjecting the desiredareas of the protective member and the blank to heat and pressure so as to cause the adhesiveto unite the two members. Preferably the-protective member 3 is united to the sheet over substantially the entire intermediate area 3a of the protective member and in relatively narrow zones extending across the member 3 adjacent each end thereof.

nated 'II and II, respectively.

The blank, either of one piece as represented by the member I or a composite member as represented by the members I and 3, is bent to substantially U-shape as shown in Figure 2. Ines-- much as the inner member I is very thin. and

' of the protective member 3, the said folding ofmay be placed on the joints formed at I2 be-' tween the lip 8 of the liner member and the lip 6 of the protective member 3, .the latter parts being subjected to heat or pressure or both 'to effect the seal.

By reference to Figure 8, it will be observed that the in-tumed, united marginal portions inasmuch as it is attached to the inside surface operate to space the front and back walls from each other a distance equal to the thickness of After the blank is bent to U-shape as shown in Figure 2, the opposite side marginal portions 5 of the U-shaped. structure which projects beyond the 'sides of the cardboard member 3' are broughttogether as indicated in Figure 3. As

there'shown, the bottom end portions 2 of the the in-turned marginal portions. It should be is greatly exaggerated so that the spacing effect is correspondingly greatly exaggerated. Such sp cingfis der to insure effective sealing at the joints I and U-shaped structure are folded upwardly andlnwardly, a triangular portion (at each end) indicated at 2a being folded into a plane extending across'the end of the U-shaped structure and otherportions indicated at 2b, 2b, being folded.

into theform of an accordion pleat between the marginal side portions of the member I as indicated in Figure 3.

The marginal side portions are brought together in face-to-face contact as shown in Figure 4 and subjected to the'applicationof sum- -cient heat or pressure or both to render the adhesive coating on the contacting surfaces of the material tacky enough to adhesively unite the said parts. When the material cools and dries it is found that the margins, thus united are practically inseparable. To finish the ends of the 9, intermediate the oppositely inwardly extending marginal portionsi, the tools or dies II and.

I1 may be provided with centrally located projections -either-of a fixed or resilient character to fit between the oppositely disposed marginal portions, or either or both of the tool members "observed that in the drawings the thicknessof the material from which thecontainer is made" 1 actually occurs is very slight. 'In or- II and Il may embody cushioned elements which will conform to the shape of the surfaces which are to be pressed together. 1

.The above described container when made of suitable moisture-proof material and when sealed closed in the manner. set forth constitutes a very eflicientcontainer for food products which should be kept for an indefinite length of time in the same condition'as to moisture content as when packaged. Such material as grated'cheese which contains'a certain percentage of moisture may be ,satisfactorily preserved, i. e. prevented from .dry-

container thus formed, the laterally extending;

united marginal portions are folded into flat-' wise position on the end walls of the container as shown in Figure 5.

When the container is fabricated to the condition shown in Figure 5 it is ready for filling with the material for which the container is designed. After it is filled, it is subjected to closing operations which are best s'hownin Fig-,-

ures 6 to 9, inclusive.

1 As shown in Figure 6', the end walls of-the container are pressed inwardly between the front andback thereof, this being done as an incident to the bringing together of the vupper edges of the container. The said upper edges are brought completely together with the upper ends of the united marginal side portions 5 located fiatwise between the front and back of the container (see Figure 8).

The lip portion 6 of the cardboard protective member and the underlying portion of the member I are then folded to a transverse position as shown in Figures 6, 7 and 13, thereby incidentally causing the said underlying'portlon of the member I to be folded into-face-to-face contact with a portion of the body member I, which extends beyond the other end of the protective member 3. Hence a joint 'I is formed for closing the top of the container. The lip 8 of the inner blank I may then be folded upwardly and around the free end of the-lip 6 so as "to provide a further joint or seal as at 9. Heat or pressure or both ing out in a package of this type and by the same token dry powder materials may be effectively preserved in that condition, i. prevented from absorbing moisture from the atmosphere, by the bag structure described.

'-'I'he cardboard member 3 extends over the main outside areas of the container and thus protects it and its contents from injury or loss, and the inward bending of the end walls incident to the closing of the container tends to remove'them from contact with surrounding objects, so that there is but little if any danger of injuring the vend walls of the container.

It is apparent that thestructure may be embodied in-containers of'a wide range of sizes.

One commercially practical size, especially for the, packaging of materialsof the character already mentigned, embodies a bottom wall measuring about three and three-eighths inches long by about 'one and one-half inches wide, and a front wall measuring about two and five-eighths inches high. The lip element 6 measures about three -eighths inches in width. Thus it will be seen that the container may be embodied in a small-sized package so as to occupy a corre- 1 may be applied to cement the joints 1 and through the agency of suitable dies or tools desig- As shown in Figure 10, the joint 1 is omitte spondingly small amount of space. The satchel shape of the package is of itself neat and attrac-" 'tive and the ackage is easy to handle, first, be: cause of its relatively small size, and second,- be-' cause. of the laterally extending flange-like closure structure'which vaifords a secure grip on the package near its upper end, notwithstanding its tapered shape. I Changes in the described structure may be made without departing from the spirit of the invention, the scope of which should be determined by reference to the following claims,'the

same being construed as broadly as possible, con

sistent with the state of the. art.

-I claim:

1. A container ofthe class described formed ginal portions of said end walls substantially of a sheet material member folded intermediate its ends so as to provide a bottom wall of predetermined width and front and back walls extending upwardly from opposite edges of said bottom wall, opposite side portions of the memin continuation of the joint between the overlying portions of the latter.

4. A container of the class described formed of a sheet material member folded intermediate its ends so as to provide a bottom wall of predetermined width and front and back walls extending upwardly from opposite edges of said bottom wall, opposite side portions of the/member being folded toward and united to each other, said folded side portions constituting end walls of the container, and marginal areas of end portions, of the bottom wall corresponding container having upper marginal portions folded to laterally extending position and one of said upper marginal portions having a lip'extension refolded outwardly of the other upper marginal portion, and a protective member overlying the front, back and bottom walls only of said container.

2. A container of the class described formed of a sheet material member folded intermediate its ends so as to provide a bottom wall of predetermined width and front and back walls extending upwardly from opposite edges of said bottom wall, opposite side portions of the member being folded toward each other from said front and back walls and having marginal portions turned outwardly and brought together with their inside faces contacting and adhesively united, said folded side portions constituting end walls of the container, the upper portions of said end walls being, tucked between said front and back walls and the latter hav-. ing their upper ends brought together to close the container, the front and back walls of the container having upper marginal portions folded to laterally extending position and one of said upper marginal portions having a lip extension refolded. outwardly of the other upper marginal portion, and a protective member overlying the front, back and bottom walls and having an end extension interposed between said refolded lip extension and the underlying marginal portion 'tosaid united side portions being tuckedbe tween said outwardly turned marginal portions,

approximately triangular areas of said bottom wall end portions inwardly of said bottom wall margins being folded upwardly into the planes of said end walls. a

5. The method of packaging which consists in. forming a blank of impervious sheet material, coating both sides of the blank with thermoplastic adhesive material, covering one coated surface of the blank with a thin sheet material, superposing over the thin sheet a thicker paper sheet to provide a protective support but leaving container end wall forming portions of the impervious sheet blank exposed, forming the composite blank into a rectangular shaped container with margins of said end wall forming portions in face to face relation, reactivating said coating on the contacting margins to cause the coated surfaces thereof to adhere to each other, charging the container with the material to;be packaged therein, tucking the end walls of the receptacle inwardly into the package and bringing the upper portions of the protectively supported walls together to close the container, and reactivating the coating on said upper portions to seal the receptacle closed.

6. The method of packaging which consists in forming a sheet material blank, covering both of the container, the contacting faces of said folded marginal portions being adhesively united to. seal the container closed.

. tending upwardly from opposite edges of said bottom wall, opposite side portions of the mem her being folded toward and united to each other,

said folded side portions constituting end walls of the container, and marginal areas of end portions of the bottom wall corresponding to said united side portions being tucked between said outwardly turned marginal portions, said tuckedin bottom marginal portions being united to each other and to the respectively adjacent mar-I one coated surface of the blank with a thin overlying sheet of coextensive area and causing it to adhere thereto, superposing over front, rear, and bottom forming portions of the thin overlying sheet a thicker sheet for protecting and supporting the assembled blank and thin sheet but leaving end wall forming portions of the assembled blank and thin sheet exposed, forming the resulting composite structure into a rectangular, open-topped receptacle with the margins of said end wall forming portions disposed in face to face contact so as to cause said adhesive coating to unite said marginal portions, charging the receptacle with the material to be packaged therein, tucking end wall portions inwardly into the container and bringing the front and rear walls together adjacent the top thereof to cause said adhesive coating to seal the receptacle closed.

FRANK D. PALMER.

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