US3095134A - Lined container for liquids and liner therefor - Google Patents

Description

3,095,134 LINED CONTAINER FOR LIQUIDS AND LINER THEREFOR Filed March 23, 1960 R. E. JACKE June 25, 1963 4 Sheets-Sheet 1 INVENTOR JAC KE QAYMOND E BY ATTORNEYS EFOR R. E. JACKE June 25, 1963 LINED CONTAINER FOR LIQUIDS AND LINER THER Filed March 25, 1960 4 Sheets-Sheet 2 I INVENTOR JAC KE QAYMON D E.

ATTORNEYS June 25, 1963 R. E. JACKE 3,095,134

LINED CONTAINER FOR LIQUIDS AND LINER THEREFOR F il ed March 23, 1960 4 Sheets-Sheet 3 i a 35 4-61. 34 1 1 51 I 50 3 E9 E10 I f [I 245' EA I I I IPA I. 1/ 1 I w 49 L\ v U J5 INVENTOR RAYMOND E. JACKE wms (Mk ATTORNEYS 3,095, 134 THEREFOR R. E. JACKE June 25, 1963 LINED CONTAINER FOR LIQUIDS AND LINER 4 Sheets-Sheet 4 Filed March 25, 1960 INVENTOR JACKE BY K, ex l RAYM ON D E.

ATTORNEYS 3,095,134 LINED CONTAINER FOR LIQUIDS AND LINER THEREFOR Raymond E. Jacke, Richmond, Va, assignor to Reynolds Metals Company, Richmond, Va., a corporation of Delaware Filed Mar. 23, 1960, Ser. No.

10 Claims.

This invention relates to an improved lined container and to an improved liner means for such a container or the like.

non with the accompanying drawings, preferred form of lined container for In the drawings, FIG. 1 filled and sealed container.

FIG. 2 is a liquids. is a perspective view of the 3 is a top plan view of final sealing thereof.

FIG. 3A is a sectional view of the liner top seam, taken on line 3A 3A of FIG. 3 to an enlarged scale.

FIG. 3B is a sectional view of the liner top seam taken on line 3B-3B of FIG. 3 to an enlarged scale.

G. 4 is a side elevation View of the container and its top seam as shown in FIG. 3.

FIG. 5 is a developed view of the liner, a portion of the line-embedded metallic foil being shown.

G. 5A is a sectional view of the liner taken on line 5A5A of FIG. 5 to an enlarged scale.

FIG. 5B is a sectional view of the liner taken on line 5B-5B of FIG. 5 to an enlarged scale.

FIG. 6 is a perspective view of a detail of the liner edges shown prior to forming of the liner into sleeve shape.

FIG. 7 is a the container body is formed.

FIG. 9 is a plan view showing the initial step of assembling the liner sleeve and blank preparatory to forming the container into a unitary structure.

FIG. 10 is a plan view showing the second step of assat n Patented June 25, 1963 sembling the liner sleeve and blank preparatory to forming the container into a unitary structure.

FIG. 10A is a View of the liner in its essential position, as taken on line 10A-Q10A, of FIG. 10, but with the liner expanded better to show the articulated nature of its pleats.

FIG. 11 is a schematic view in elevation of an apparatus suitable for integrating the liner and blank as seen in FIG. 10 into the integrated collapsed open-ended container of FIG. 12.

FIG. 11A is a schematic view in plan of the apparatus of FIG. 11 showing the relative sizes of the induction heating panels and the collapsed container parts movable thereacross.

FIG. 12 is a plan view of the integrated collapsed openended container following the second step of induction heating.

FIG. 12A is a View of the liner in its assembled position within the container as taken on line 12A-12A of FIG. 12, but with the liner expanded, as in FIG. 10A.

'FIG. 13 is a perspective view of the top of the container in position for filling.

FIG. 14 is a perspective view of the top of the container during the initial stage of sealing the liner top seam following filling of the container; 'and FIG. 15 is a perspective view of the top of the container during the final stage of forming the double seal of the liner top seam.

FIG. 16 is a greatly enlarged cross section of a portion of another embodiment of liner lamination attached to the carton wall.

Referring first to FIG. 1, a completed container package generally represented at 14} and having flat bottom, top and side-wall portions, may be encased in a conventional overwrap 11. of any suitable material and With a conventional tear strip 12 In View of the significance of the heat-scalable liner in the combination, an explanation of its construction is desirable prior to describing the container, and referare provided, thus forming the liner into a five-layered or laminated structure. Accordingly,

by any suitable means,

the metallic layer rapidly such as a rouletting wheel,

' gitudinal seal of the liner.

formation of the improved the metallic layer 16 after the inward fold 31 arrangement over the outward fold containing perforated as best seen in FIG. 5 and 5A. A series of closely spaced parallel small grooves 21 are formed in one direction across the entire outer surface of the liner layer 16, these grooves being intersected by a similar series of grooves 22 at a suitable intersecting angle thereto. As the grooves 21 and 22 are formed, companion projections 23 and 24 are extruded on the lower side of the layer 16, these projections being embedded in the material comprising 19. The formation of such grooves may be readily made for example, by pressing the layer 16 against a knurled die prior to incorporation of that layer into the remainder of the laminated liner sheet.

layer I prefer a line-embedding or scoring pattern of diamond shaped configuration, although other geometrical patterns may be used. As a result of the corrugated effect thus produced, expansion of the metallic sheet due to heating can take place without warping or wrinkling the surface of the sheet as a whole. Moreover, due to the intimate contact of the metallic layer with the adjacent wax layer and to the excellent heat conductivity of the metallic layer, such as aluminum, flow of the wax for bonding and for sealing purposes results readily and instantly as soon as heat is applied to the liner. By the same token, radiates heat and cools quickly when the heat source is interrupted. These features are of particular importance when induction heating is employed, as will later appear.

The wax which migrates tended essentially to adhere to the inner surface of the container, although part of such wax is employed for double sealing of certain seams of the liner. Migration of Wax through the tissue layer presents no problem, but for sealing of the confronting 16 of the liner, means must be provided for permitting passage of the wax through an otherwise impervious metallic layer. We therefore provide lightly punctured sealing bands of perforations in that metallic layer at the rethereover an abrading means quired locations by passing or roller covered with emery cloth, or equivalent means, while under suflicient pressure to form a series of spaced pin-holes of sufficient size to permit the heated wax to exude therethrough for sealing purposes. In general, comprise a thin sheet of metal, such as aluminum containing sheet or foil of commercial aluminum, 'or 3 suitable aluminum alloy in the order of about 0.0003 to 0.006 inch in thickness thus requiring no excessive pressure to form these pinholes.

As seen in FIGS. 5 and 5B, small pinholes 26 are formed in the shaped of bands 27 and 28 extending along the edges of the liner sheet which will later be sealed to form the top and bottom double-sealed seams, respectively. Also a similar band 29 is formed along the edge of that sheet whiehwill later be sealed to form thelon- In all of these bands, the pinholes 26 extend into open communication with the wax layer 19 as seen in FIG. 5B.

Reference now is made to liner sleeve as an intermediate article of manufacture and which can be preformed rapidly on high speed bag making machinery. Having the above described liner sheet of FIG. 5,'the left hand edge thereof, is creased and bent backwardly to form the sealing fold with the band 29 of the metallic layer exposed. At the same time'a first pleat 30 is formed adjacent the sealing fold beneath the band 29. The right hand edge of the sheet is also folded inwardly as at 31 and a second pleat 32, generally located at about half the width of the entire sheet, is formed. The thus creased sheet accordingly has the porous layer 17 forming its outer surface and with serving as its inner surface. Thereis engaged in interlocking 'band 29 and a sealing means such as a heated iron or through tissue layer 17 is in- FIGS. and 7 showing the surfaces of the metallic layer I i the layer 16 of the liner may '33 of the liner is 40 and 42. At this 4 the like is passed longitudinally of these interlocked folds and localized heating is eifecte It will be understood that as this sealing action occurs, the wax from layer 19 exudes through the perforations in band 29 and forms an adhesive layer in contact with the imperforate metallic inner surface 16 of the liner immediately 'above the fold 31. Simultaneously, wax from layer 20 exudes through the paper layer 17 of the lower side of the liner edge below the band 29 and forms an adhesive layer in contact with the imperforate metallic inner surface 16 of the liner, immediately below the interlocked fold 31. Since wax is supplied from two layer sources, an eflicient sealing of the longitudinal seam thus produced, and since the pleats now to be described serve to relieve that seam of rupturing stresses, the longitudinal seam 33 remains hermetically sealed during the normal life of the container. For reasons later to appear, the axis of the longitudinal seam 33 is located within the container in line with the front and rear flaps of the container top and bottom.

As seen in FIG. 7, the liner sleeve above described preferably is handled in collapsed form and the extreme 'outer edge 34 of the first pleat 30 extends. outwardly of the seam 33. Likewise, the extreme outer edge 35 of the second pleat 32 extends outwardly of the lower side edge of that pleat, thus presenting pleats each having legs of unequal size. I have found that the sealed seam 33 should be spaced from the bend line of the blank which is to form a corner of the container so that flexing of that blank at the corner will not place stress upon the seam. By providing the pleat 30 which lies in the region of the corner, that pleat serves to accommodate those stresses and thus relieve the seam 33.

Referring now to FIG. 8; I provide an improved container blank formed of comparatively rigid, but flexible material, such as conventional paper board material. The dimensions of the blank are such as to provide a container of any required size for holding the desired quantity of liquids or other material in the order of about 4 to 32 oz., as for example, pints or quarts. As an important feature, the blank is so formed as to provide for double sealed top and bottom edges of the above described liner and particularly for rapid sealing and closing of the filled container.

The blank may comprise elongated front and rear wall panels 40 and 41 respectively and hingedly joined by suitable bend lines to a pair of elongated side wall panels 42 and 43. Extending laterally from the front wall panel is an elongated reinforcing flap 44 which is pro- 'vided with a conventional glue strip permitting it to be fastened to the inside surface of the extreme edge of side wall 43 as the container is assembled in collapsed form. Front panel 40 has hinged at its top and bottorn a pair of similar relatively short flaps 45 and 46 and rear panel 41 has hinged at its top and bottom a similar pair of short flaps 47 and 48. The combined length of the cooperating short flaps 45-46 and 47-48 is such as to be slightly less than the distance between the front and rear walls of the assembled container and to permit the double sealed top and bottom edges of the liner to be held between those cooperating short flaps.

One side panel 42 has hinged at its top and bottom substantially rectangular flaps 13 and 49, while the other side panel 43 has hinged at its top and bottom substantially rectangular flaps 14 and 50. All of the flaps at both top and bottom of the blank are slitted along their abutting edges so that they may be hingedly moved without interference with the adjacent flaps.

Reference now is nrade to FIGS. 9 and 12 showing one method for rapidly assembling the above described liner and blank intoan integrated container. As seen in FIG. 9, the collapsed liner sleeve of FIG. 7 is first registered with the developed blank of FIG. 8 so that the edge 34 of the firstpleat 30 lies at the fold line between panels time the longitudinal seam 33 is slightly inboard of that fold line; the extreme edge 35 of the second pleat 32 lies at the fold line between panels 41 and 43; and the ,top and bottom edges of the liner sleeve are in line with envelope for further be passed directly into the container belt in loose assembled relation.

processing or may turning conveyor In either event, the

As seen in the diagrammatic views of FIGS. 11 and 11A, the thus described assembly is fed upon a nonthis time receive suificient heat and pressure to seal the liner to itself in those regions. However, it is equally desirable to eflect a strong bonding of the liner layer 17 to the blank along the full surfaces of each erly occupied by side panel 43; side panel 43 moves to the former position of rear panel 41; rear panel 4-1 moves to the former position of side panel 42; and side panel 42 moves to the former position of front panel 40. Durwax holding the permits slippage of those pleat surfaces and distention of the pleats. Thus as seen in FIGS. 12A and 10A the pleats 3t] and 32 are opened. This opening of the pleats, of course, makes additional liner surface available for bonding of the liner to the blank and re heated liner and blank assembly, at which time the liner fully adjusts itself to the four sided blank without wrinkling, and is completely sealed to the container blank in the desired regions. The liner at this time is securely attached to the blank at each of the four fold lines at the corners. Upon leaving the open-ended container in fully ready for opening into the shape shown in FIG. 13 and for sealing of one of its ends preparatory to filling.

As will be apparent to those skilled in the package making art, the above described method can be conparticularly from about minute. In contrast with previous procedures wherein a heated mandrel is required to be moved through the assembled liner and blank in order to bond them together, the passages of these components between induction heating poles while in collapsed form, greatly increases the rate of production and without in any way detracting from the quality of the final product.

Considering now FIGS. 13 of an end of the container is that the top of 300 to 600 packages per to 15 wherein the sealing shown, it will be assumed the container is shown therein and that the liner is partially pulled as best seen in FIG. 3, but portions still remaining faces of those flaps.

A suitable heat sealing means is then passed along this fin at which time wax from layer 19 passes through pin forms a bond between the two face-to-face out of the above described fin.

As seen in FIG. 3B the double-sealed seam generally comprises four plies of the liner but at the location where the longitudinal seam 33 is folded in the tin structure the double sealed seam comprises eight plies of the liner.

. tend into the space between the layers 412 layers 412 and 414. V

This feature of double-sealed seam is of particular significance as regards the hermetic sealing of the container. As is known, when the longitudinal seam is merely folded intoplace, above a top the top of the liner is sealed, capillary action, occurring during the handling of the filled container, may cause a minute breakage of the hermetic seal. We have found, however, that by employing the two fold portions of the fin and heat sealing the overlapped eight plies of the liner, any such capillary action is effectively prevented. Moreover, we have found it necessary to so position the longitudinal seam 33 so that it lies against one of the shorter top flaps rather than against one of the flaps which pull away from the liner during the sealing operation. In this Way, the integrity .of that longitudinal seam is not impaired during sealing of the container.

' As shown in FIG. 4 the fin position is reduced in height from the dotted line position to the solid line position when the double sealing action and the folding action is completed. As the fin is-folded over the rear top flap 47, the side flap 14 carrying its triangular portions of the liner bonded thereto is also folded over both the rear and front top flaps and finally the side flap 13 carrying its triangular portions of the liner bonded thereto is folded over the side flap 14, After this is accomplished the overwrap 11 may be added to the package, if such is employed. Otherwise, a simple adhesive'means may be used to fasten the side flap 13 upon the side flap 14. The thus described sealing action of one end of the container is duplicated during the sealing of the other end thereof, one end of course, being sealed prior to the other so that filling of the container may take place.

The container as made in accordance with the invention is sanitary as Well as mechanically strong. No free adhesives or coatings are present on the inner metallic surface which is in contact with the contents of the container. The reinforcing longitudinal seam 33 has no inwardly exposed edge of theliner and that seam moreover is doublesealed at its extremities so that channeling of liquid due to'capillary action cannot take place after filling and before opening of the container.

A form of lamination for use in the liner, which is now preferred, is shown in FIG. 16 which comprises a lamination of a metal (aluminum) foil layer 400, a layer of heat resistant glue 402, a layer of porous tissue 404, a layer of heat activated adhesive, such as rnicrocrystalline wax 406, alayer of wax impervious material, such as cellophane 408, a layer of heat activated adhesive, such as microcrystalline 410, and a layer of porous tissue 412. This lamination may be used to make the liner for the carton herein disclosed with the aluminum foil adjacent the contents of the container. The aluminum foil 400 is inside of the liner, whereas the layer 412 eventually is heat bonded to thecarton layer or lamination 414. The aluminum foil layer 400 may be, for example, in the order of about 0.0003 to 0.006 inch in thickness, such as 0.0004 inch in thickness. The foil400 may have the previously shown and described grooves 21 and 22, not repeated in 'FIG. 16. The layer 402 may be of any heat resistant glue desired. The porous tissue layer 404 may be a porous tissue paper of 8 pounds weight per ream of 500 sheets 24 by 36". The layer 406 may be of microcrystalline wax of sufficient thickness to permeate some of the porous tissue 404. The layer 408 may be cellophane of suitable thickness, such as .001". This may be any other type of material which is resistant to the action of the wax, and which resists tearing and has other similar character- 'istics of cellophane. The layers 410 and 412 may be substantially the same as layers 406 and 404 respectively. The Wax of layer 410 is sufficient to permeate the porous tissue of 412 and has sufiicient excess, so that it may exand 414 to produce a bonding action between the Per-forations pass through the foil 400 and layer of glue .195 9, now abandoned,

wall portion,

'greater than the distance portion, longitudinally along a side wall portion,

- containing a product 402 so the wax can pass through perforations during the sealing of the ends of the liner.

One of the advantages of this lamination of FIG. 16 is that the cellophane layer 408 is floating between the yielding porous tissue layers 404 and 412. Any differential movements between the unielding foil layer 400, the microcrystalline layers 406 and 410 and the carton layer 414 are compensated by the yielding action of the porous tissues, so that no tearing action is likely to be produced on the floating cellophane layer 408 at sharp corners and other bends.

By way of example, the thickness of a carton cardboard wall may be 0.015 inch, more' or less. The thickness of the foil lamination may be 0.005 inch, more or less. This illustrates the relatively short distance of heat travel required between the surface to be bonded and the heated aluminum foil. This is in comparison to the relatively long distance of heat travel (or great heat resistance) from the outside of the carton wall to the inner surface of the carton wall where the bonding is to take place.

This application is a continuation-in-part of our copending application Serial Number 830,692, filed July 30, for Lined Container for Liquids and Liner Therefor and Method for Rapidly Assembling which in turn is a continuation-in-part of our now abandoned application .Serial Number 751,040, filed July 25, 1958, for Liner Container for Liquids and Liner Therefor With Method for Rapidly This application is also a continuation-in-part of the copending applications Serial Number 606,873, filed August 29, 1956, for Flexible Container Adapted for Fluids; Serial Number 63 8,016, filed February 4, 1957, for Lined Container for Liquids and Liner Therefor; and Serial Number 768,609, filed October 21, 1958, for Lined Reclosable Container 'Having Opening and Reclosing Means.

While the form of the invention now preferred has been disclosed in accordance with the requirement of the statutes, other forms may be used, all coming within the scope of the claims which follow.

What we claim as new and desire to secure Patent is:

1. A lined container adapted to hold a product and comprising, a comparatively rigid, box-like member having a bottom portion, wall portions and a top portion, said top portion comprising a first top flap hinged to the front a second top flap hinged to the rear wall portion and side top flaps hinged to the side wall portions, said first and second top flaps having a combined length by Letters less than the distance between said front and rear wall portions and said side top flaps having a combined length between said side wall portions; and a liner having a non-metallic outer surface heatsealed to said bottom, top, and wall portions and an inner metallic surface heat-sealed to itself along bottom, side and top seams extending respectively across said bottom and said top seam being disposed above and between said first and second top flaps and beneath each of said side top flaps, said liner having a nonyielding layer intermediate said non-metallic outer surface and said inner metallic surface sandwiched between yielding layers to permit difierential movement between said container walls and said metallic surface without tearing of said unyielding layer because said unyielding layer is floatingly carried between said yielding layers, said liner therein.

2. A container as defined in claim 1 wherein a portion of said longitudinal seam is attached to at least one of said first and second top flaps.

3. A container as defined in across said top portion,

claim 1 wherein said liner includes an expansion pleat extending substantially par- 5. A container as defined in claim 1 wherein said top least eight plies of folded upon itself.

6. A container as defined in claim 1 wherein said metallie surface of said liner comprises aluminum.

7. For use in lined container adapted to hold liquids and to be rapidly assembled, filled and sealed, a laminated 9. A liner as defined in claim 7 including a band of perforations extending along the open ends of said col- 10. A liner having a layer of non-yielding metallic foil on a first side thereof and a layer of porous yielding material on the second side thereof, a layer of imperforate layers float said imperforate layer therebetween.

References Cited in the file of this patent UNITED STATES PATENTS 2,310,712 Schmied Feb. '9, 1943 2,363,425 Klein Nov. 21, 1944 2,396,565 Gardner Mar. 12, 1946 2,423,804 Waters July 8, 1947 2,441,778 Traver May 18, 1948 2,481,380 Anderson Sept. 6, 1949 2,599,708 Gottesrnan June 10, 1952 2,606,856 Hurrey et a1 Aug. 12, 1952 2,617,752 Von Hauteville Nov. 11, 1952 2,998,178 Jacke Aug. 29, 1961

Claims (1)

1. A LINED CONTAINER ADAPTED TO HOLD A PRODUCT AND COMPRISING, A COMPARATIVELY RIGID, BOX-LIKE MEMBER HAVING A BOTTOM PORTION, WALL PORTIONS AND A TOP PORTION, SAID TOP PORTION COMPRISING A FIRST TOP FLAP HINGED TO THE FRONT WALL PORTION, A SECOND TOP FLAP HINGED TO THE REAR WALL PORTION AND SIDE TOP FLAPS HINGED TO THE SIDE WALL PORTIONS, SAID FIRST AND SECOND TOP FLAPS HAVING A COMBINED LENGTH LESS THAN THE DISTANCE BETWEEN SAID FRONT AND REAR WALL PORTIONS AND SAID SIDE TOP FLAPS HAVING A COMBINED LENGTH GREATER THAN THE DISTANCE BETWEEN SAID SIDE WALL PORTIONS; AND A LINER HAVING A NON-METALLIC OUTER SURFACE HEATSEALED TO SAID BOTTOM, TOP, AND WALL PORTIONS AND AN INNER METALLIC SURFACE HEAT-SEALED TO ITSELF ALONG BOTTOM, SIDE AND TOP SEAMS EXTENDING RESPECTIVELY ACROSS SAID BOTTOM PORTION, LONGITUDINALLY ALONG A SIDE WALL PORTION, AND ACROSS SAID TOP PORTION, SAID TOP SEAM BEING DISPOSED ABOVE AND BETWEEN SAID FIRST AND SECOND TOP FLAPS AND BENEATH EACH OF SAID SIDE TOP FLAPS, SAID LINER HAVING A NONYIELDING LAYER INTERMEDIATE SAID NON-METALLIC OUTER SURFACE AND SAID INNER METALLIC SURFACE SANDWICHED BETWEEN YIELDING LAYERS TO PERMIT DIFFERENTIAL MOVEMENT BETWEEN SAID CONTAINER WALLS AND SAID METALLIC SURFACE WITHOUT TEARING OF SAID UNYIELDING LAYER BECAUSE SAID UNYIELDING LAYER IS FLOATINGLY CARRIED BETWEEN SAID YIELDING LAYERS, SAID LINER CONTAINING A PRODUCT THEREIN.

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