US2481380A - Package - Google Patents

Description

Sept. 6, 1949. H. v. ANDERSON, SR

PACKAGE 2 Sheets-Sheet 1 Filed July 4, 1945 w I E 25 1 14 E22: EEEZZEE Sept. 6, 1949. H. v. ANDERSON, SR

PACKAGE 2 Sheets-Sheet 2 Filed July 4, 1945 Patented Sept. 6, 1949 UNITED STATES PACKAGE Harlan V. Anderson, Sr., Minneapolis, Minn., as- I llgnor to Rapinwax Paper Company, Minneapolis, Minn, a corporation of Minnesota Application July 4, 1945, Serial No. 803,185

3 Claims. (Cl. 229-14) My invention relates to an improvement in package and deals more particularly with a package which may be hermetically sealed and which is formed of paper board combined with a moisture proof lining material.

In the packaging of frozen foods and the like it has been found extremely desirable to seal the products to be frozen hermetically before the sealing operation. While the sealing of moisture proof bags is a relatively simple operation, such moisture proof bags oftentimes do not give the proper support to the contents. As such bags are usually formed of thin flexible material, the shape of each package varies somewhat from other packages. Furthermore, flexible sealed bags do not stack well and are likely to become ruptured in handling. For this reason most persons prefer to use tubes or cartons which are of uniform size and which properly support the products.

In many instances sealed bags have been used within outer cartons or tubular containers. While such packages provide the proper support and seal the products to be frozen adequately, there are certain disadvantages in such an arrangement. In the first place the separate bag and outer package require double handling. In the second place in instances where the sealed bag does not contact the walls of the outer container throughout large areas, considerably greater time is required for the freezing operation. Furthermore, considerable storage space is usually lost due to air spaces between the inner bag and the outer container.

It is an object of the present invention to provide a package having a body of paper board which defines the shape and size of the package and which is equipped with a moisture proof sealable liner attached directly thereto. Such a package combines the strength of a paper board carton with the sealing qualities of a separate inner bag and possess most of the advantages of the former separate elements.

A feature of the present invention lies in the fact that the liner is maintained in heat exchange contact with the outer paper board covering, thereby avoiding loss in storage space due to air pockets between the liner and the carton. The attaching of the liner to the covering also insures proper heat conductivity to hasten the freezing operation.

A feature of the present invention resides in the provision of a paper board carton blank se-' cured to a heat scalable lining material at a point spaced from the marginal edges thereof. This carton blank is so arranged that when the blank is folded so that the opposite ends thereof are in superimposed relation, the sides and end of the liner project beyond the paper board blank to permit marginal sealing of the liner.

A feature of .the present invention lies in the provision of a combined blank and liner, both of which are generally rectangular in outline shape with the paper board blank secured to the center portion of the liner. When the liner is centrally folded the opposite sides thereof project beyond theblank so that they may be heat sealed on a conventional bag sealing machine or may be sealed by the application of heat and pressure through the use of a common flat iron or curling iron. The bag thus formed may be folded into box shape with the sealed edges of the liner folded externally of the carton. A feature of the present invention resides in providing a combined carton and liner in which the liner provides a'lining for the carton and in which the heat sealed edges of the liner overlie the outer surface of the carton. As a result any imperfections in the sealing operation which might permit liquid to escape through a scam in the liner may be easily and quickly corrected during or after the filling operation by reapplication of heat and pressure at the point of leakage. A further feature of the present invention lies in the combination of a thin paper board carton and a metal foil liner attached together as previously specified. The portions of the foil liner which form the seams of the liner fold exteriorlyof the carton and act to conduct heat from the contents to the exterior of the carton. Not only are the carton contents quickly frozen, by contactwith the metal foil liner, but also the foil provides a quick transfer of heat to the exterior of the carton. Even though the contents of the package engage the liner over relatively small areas of contact the relatively high heat conductivity of the liner permits a quick dispersal of the heat of the contents to quickly freeze the contents.

These and other objects and novel features of m invention will be more clearly and fully set forth in the following specification and claims.

In the drawings forming a part of my specification:

Figure 1 is a diagrammatic plan view of the carton blank showing the construction thereof.

Figure 2 is a diagrammatic plan view of the carton in partially sealed form.

Figure 3 is a perspective view of the carton in partially open form.

Figure 4 is a perspective view similar to Figure 3. showing the carton in readiness for the filling operation.

Figure 5 is a perspective view of the carton showing the liner thereof hermetically sealed.

Figure 6 is a perspective view of the sealed carton.

Figure 7 is a diagrammatic plan view of a modified form of carton blank. I V

The carton A, illustrated in Figures 1 through 6 of the drawings, comprises the rectangular liner 13 having a substantially rectangular carton blank C adhered thereto. The carton blank C is of smaller dimensions than the liner B and is secured to the liner in such a way as to be spaced from the marginal edges thereof.

The liner B is, in preferred form, a sheet of metal foil such as aluminum foil and a coating of thermoplastic adhesive or the like on one surface thereof. The coated surface is the under-surface of the sheet as viewed in Figure 1 of the drawings which forms the inner surface of the liner in folded condition of the carton.

The carton blank C is formed of paper board or the like which is preferably prescored as illustrated in the drawings. The blank C includes a top panel III, a side wall panel bottom panels i2 and I3, a side wall panel [4, and a top panel |'6, which are separated by substantially parallel fold lines |6, l1, I9, 20, and 2|, respectively. The top panels Ill and i6 are each of a size to extend substantially half way across the top of the carton and the bottom panels l2 and I3 combine to form the bottom of the carton in erected condition of the carton A.

End wall panels 22 and 23 are connected to the side wall panels H and M respectively along aligned fold lines 24 and 26. Similar end wall panels 26 and 21 are connected to the side wall panels H and I4 along aligned fold lines 23 and 36. In erected form of the carton the panels 22 and 23 combine to form one end wall or the carton while the panels 26 and 21 combine to form the other end wall thereof.

The paper board blank C is continuous between the panels 22 and 23 and also between the panels 26 and 21, the portions of the blank between these respective panels being preferably separated from the bottom panels i2 and i3 by a out line or a cut score line. The area between the panels 22 and 23 is divided into two rectangular areas 3| and 32. The rectangular area 3| is bounded by an extension of the fold line l1, the cut score line 33 aligned with the fold lines 24 and 26, an extension of the fold line i3 and the edge of the blank. The rectangular area 32 is bounded by an extension of the fold line is, the fold or out line 33, an extension of the fold line 20 and the edge of the blank. The rectangular areas 3| and 32 are divided into two equal triangular areas by diagonal fold lines identified by the numerals 34 and 36 respectively.

The portion of the blank connecting the panels "and 21 is divided into two rectangular areas 36 and 31. The rectangular area 36 is bounded by an extension of the fold line H, the fold or out line 33 aligned with the-fold lines 29 and 30, an extension of the fold line l3 and the edge of the carton blank. The rectangular area 31 is bounded by an extension of the fold line IS, the score or out line 33, an extension of the fold line 23 and the edge of the carton blank. The rectangular areas 36 and 31 are divided into two equal triangular areas by diagonal fold lines 40 and 4| respectively. The diagonal fold lines 34 and 36 converge together at the edge of the carton blank as do also the diagonal fold lines 43 and 4|.

. Rectangular flaps 42 and 43 are connected to the top panel l along extensions of the fold lines 24 and 29 respectively, these flaps being separated from the end wall panels 22 and 26 by cut lines or crease lines 44 and 46 respectively. Diagonal fold lines 46 and 41 divide the rectangular areas 42 and 43 into two equal triangles. these diagonal fold lines terminating at the corners of the carton blank.

similar rectangular flaps 43 and 60 are connected to the top panel l6 along extensions of the fold lines 26 and 36. These rectangular flaps are separated from the end wall panels 23 and 21 by cut or score lines 6| and 62. These rectangular flaps 43 and 63 are divided into two equal triangular portions by diagonal fold lines 63 and 64, which terminate at the outermost corners of the carton blank.

Tabs or flaps 66 and 66 are formed in the bottom wall of the carton, these tabs being defined by substantially U-shaped cut lines 61 and 63.

The tabs 66 and 66 provide a means of holding 4 the carton in open position as will be later described in detail.

The carton blank C is secured to the liner B by any suitable means such as by an adhesive. The carton blanks may be supplied to the ultimate user in the flat condition shown in Figure 1 of the drawings or in the centrally folded condition shown in Figure 2 of the drawings, in which position the two ends of the blank and liner have been folded into superimposed relation.

In erecting the carton the blank and liner is first folded along the fold line l3, which is midway between the ends of the carton blank ends 0 and is usually substantially midway between the ends of the liner B. The blanks are folded so that the liner B is inwardly of the carton blank C as illustrated in Figure 2 of the drawings. In this flat folded condition the opposed marginal edges 66 and 66 of the liner extend beyond the side edges of the blank. This folding operation places the thermoplastic adhesive coated surfaces of the liner B in contacting relationship. The edges 66 and 66 may accordingly be sealed together by any ordinary heat sealing equipment to form a liquid tight bag open only at one end.

With the opposite edges of the liner adhered together the combined carton and blank may be folded into the condition illustrated in Figure 3 of the drawings, the paper board blank folding along the fold lines 24, 26, 23 and 36, the fold lines l1 and 23, and the diagonal fold lines 34, 36, 43, and 4|. Simultaneously with the folding of the blank along the above described fold lines the blank infolds along the central fold line l3 so as to bring the bottom panels l2 and I3 into coplanar relationship.

The projecting sealed edges 66 and 66 of the liner B are next folded flat against the surfaces from which they protrude as illustrated in Figure 3 of the drawings. The portions of the liner and blank forming the rectangular areas 3|, 32, 36 and 31 which have been folded to form a double thickness triangular tab are next folded to underlie the bottom panels l2 and I3 and the ends of these triangular tabs are inserted beneath the locking tabs 66 and 66 in the bottom panels l2 and I3. The carton is then in open position as illustrated in Figure 4 of the drawings and is in readiness for the filling operation.

After the carton A has been filled the top of the surfaces thereof. Before the sealing operation the contents thereof are in readiness for the freezing operation. In order to enhance the appearance of the carton and to make the same easier to storeand handle, the liner is preferably folded down to overlie the coplanar panels forming the carton top and the triangular flaps formed by the diagonal folding of the flaps 42, 43, 49 and 59 are folded to overlie the top of the carton.

From the foregoing description it will be ob vious that my carton may be hermetically sealed by any common heat sealing equipment or the sealing operation may be readily accomplished in the home by use of a heated flat iron or curling iron. All of the surfaces to be sealed together are in flat contacting relation at the time of sealing so that no diiflculty is ordinarily experienced in this operation.

In Figure 7 of the drawings I disclose a modifled form of blank D which is in most essentials similar to that previously described. With some types of stock, however, less difllculty is experienced in folding the blank if the carton blank illustrated in Figure 7 is employed. The carton D includes a liner B identical with that previously described and a carton blank E adhered thereto. The carton blank E is secured spaced from the edges of the liner B for the purpose previously described.

The carton blank E includes a top panel I, a side wall panel 62, bottom panels 63 and N, a side wall panel 65 and a top panel 66 connected in the sequence described by parallel fold lines 81, 69, 70, M and 12. End wall panels I! and I4 are connected to the side wall panels 52 along aligned fold lines I and 76 while end wall panels I1 and 79 are connected to the side wall panels 62 and ll along aligned fold lines 89 and ll. The aligned fold lines and 78 are parallel to the fold lines 80 and ill.

Triangular flaps 82 and 83 are connected to one end of the panels 13 and I1 along extensions of the fold line 69. Similar triangular flaps l4 and 85 are connected to the end wall panels 14 and II along extensions of the fold line II. The formation of these triangular flaps 82, II, I and I. leaves a triangular open area between the end wall panels 73 and I4 and between the end wall panels 11 and 19. In the folding of the carton as previously described in connection with the carton A, these open areas eliminate one thickness of carton stock without seriously detracting from the strength of the finished carton.

Rectangular comer areas It and 87 are provided between the top panel 6| and the end panels 73 and I1. These rectangular areas are divided by diagonal cutdines l9 and I0 respectively. Similar rectangular areas 9| and 92 are provided between the top panel 68 and the end wall panels 14 and 79. These last named rectangular areas are also divided by diagonal cut lines 93 and '4 to form two similar triangular portions. The cut I lines in the corner areas may comprise cut score lines or score lines, but are preferably cut to simplify the folding operation.

The carton D is opened, filled and sealed in the manner previously described in conjunction with the carton A. Cut lines 9!, and It in the bottom panels 63 and 64 form tabs into which the triangular flaps produced by the folding of the cartonmaybeinsertedtohoidthecartonin erected form.

In accordance with the patent statutes, I have described the principles of construction and operation of my package, and while I have endeavored to set forth the best embodiments thereof, I desire to have it understood that obvious changes may be made within the scope of the following claims without departing from the spirit of my invention.

I claim:

1. A carton construction including a heat sealable metal foil liner of relatively high heat conductivity, a carton blank of material relatively low in heat conductivity secured to said liner spaced from the edges thereof, said blank including a rectangular intermediate panel, a pair of similarly shaped wall panels foldably connected to opposite edges of said intermediate panel, and a pair of flanges foldably connected along parallel lines to said wall panels, said intermediate panel having a fold line therethrough parallel to and intermediate said opposite side thereof, said flanges being of substantially one-half the length of said intermediate panel, said flanges being folded into coplanar relation, said liner extending between said flanges on opposite sides of the blank and sealed externally of said carton blank 7 to provide a heat conductive passage from the exterior of the package to the interior thereof.

2. A carton blank including a rectangular bottom wall panel having a central fold line extending transversely therethrough, a pair of side wall panels foldably connected to the edges of said bottom panel parallel to said fold line, a pair of side wall flanges foldably connected to opposite edges of each side wall panel, a top wall flange foldably connected to the upper edge of each side wall panel, a triangular tab foidably connected to the lower edge of each side wall flange, said triangular tab being defined by the fold line connecting the tab to the side wall flange, a line forming a continuation of the free edge of the side wall flange, and a diagonal line emanating from the corner of the juncture between each side wall flange, its side wall panel, and the bottom wall panel, and triangular flaps foldably connected to the ends of said top wall flanges and the upper edges of said side wall flanges, said triangular flaps being formed by cutting the rectangular area of the blank between each top wall flange and the adjacent side wall flanges along a diagonal line emanating from the upper corners of said side wall panels.

3. The structure defined in claim 2 and including a metal foil liner secured to said blank and of larger dimensions than said blank so that the edges of the liner project beyond the edges of the blank on all sides thereof.

HARLAN V. ANDERSO Ba.

REFERENCES CITED The following references are of record in the die of this patent:

UNITED STATES PATENTS Number Name Date 1,775,027 Hartmann Sept. 2, 1930 1,899,311 Cassell Feb. 28, 1933 2,252,462 Howard Aug. 12, 1941 2,316,919 Waters Apr. 20, 1943 2,375,809 Moore May 15, 1945 Dc-don...- Rb. 26 u

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