US3186624A

US3186624A - Reclosable carton

Info

Publication number: US3186624A
Application number: US260366A
Authority: US
Inventors: Edwin L Arneson
Original assignee: Federal Paper Board Co Inc
Current assignee: Federal Paper Board Co Inc
Priority date: 1963-02-25
Filing date: 1963-02-25
Publication date: 1965-06-01
Anticipated expiration: 1982-06-01

Description

June 1, 1965 E. L. ARNESON RECLOSABLE CARTON 4 Sheets-Sheet 1 Filed Feb. 25, 1963 R m V m [dd/mi. Jrrzwa June 1, 1965 E. L. ARNESON RECLOSABLE CARTON 4 Sheets-Sheet 2 Filed Feb. 25, 1963 June 1, 1965 E. ARNESON RECLOSABLE CARTON 4 Sheets-Sheet 3 Filed Feb. 25, 1963 INVENTOR Fwd/Z1. $72650,

June 1, 1965 E. L. ARNESON 3,186,624

RECLOSABLE CARTON Filed Feb. 25, 1963 4 Sheets-Sheet 4 l l I I I1 1 90 INVENTOR.

[6mm Z. dr/zew/z,

BY MQZW h W United States Patent 3,185,624 RECLQEiABLE CARTON Edwin L. Arneson, Morris, Till, assignor to Federal Paper Board Company, Inc, Bogota, N.3., a corporation of New York Filed Feb. 25, 1963, Ser. No. 260,366

1 6 Claims. (ill. ZZfi-Sl) This invention relates to packaging and is more particularly concerned with improvements in a carton of generally rectangular shape which is formed from a single blank of foldable sheet of material and which is adapted for filling through an initially open end, with the filling end being thereafter closed and the carton having a side wall formed to provide a reclosable cover which permits ready opening for removal of the contents and reclosing of the carton for storage, if desired.

In the packaging of certain products a generally rectangular carton has heretofore been employed which has been fabricated from a single blank of paperboard sheet material cut and scored to provide side and end wall panels which are secured together initially to form a tubular container with the flaps at one end being open for filling and being subsequently closed, the container in its filled and closed condition having one of the side walls hinged to adjoining side walls so that it may be swung to an open position to permit dispensing of the contents of the container through the side thereof and the reclosable cover thus formed generally having flaps along the free edges thereof which are disposed in the planes of the body forming front, side and end walls in the closed condition of the carton. This type of carton has been widely used in the packaging of certain consumer products. It has been employed particularly in the packaging of ice cream, in half gallon quantities, for sale directly to the consumer as distinguished from bulk packaging in larger quantities for sale to commercial users. While previous cartons of this type have been widely adapted for ice cream packaging, largely because of the ease with which the carton may be set up and filled on relatively inexpensive machinery, they have not been entirely satisfactory for a number of reasons. Generally, cartons of this type have been designed with the cover forming one of the larger sides so as to provide the largest possible opening for dispensing the ice cream which frequently is frozen to a hardness making removal from the carton difficult, but the users have been inclined to ignore the side opening reclosable cover feature of the carton and to open the carton by tearing out an end wall, resulting in difficulty in removing the contents, and frequently resulting, also, in the entire carton coming apart, so that satisfactory reclosure thereof, when only a part of the contents has been removed, is virtually impossible. Even when the cartons previously designed for ice cream packaging have been properly opened the cover arrangements have not been satisfactory because it is difficult to reclose the cover and when reclosed a sloppy appearance results. It is an object of the present invention, therefore, to provide an improved carton of the type referred to which is adapted to be used in the same manner and having a reclosable cover arrangement which may be readily opened by the consumer and readily closed so as to leave a neat and attractive package for return to storage when only a portion of the product is dispensed therefrom and-which also may be set up and filled by the manufacturer with only a slight modification of equipment now commonly used for setting up, filling and closing the previously developed cartons.

Another object of the invention is to provide improvements in a packaging container or carton of the type .which is formed from a blank of paperboard or similar material cut and scored to provide wall forming panels which are connected to form, when initially set up, a tubular container with an open end for receiving the product therein, which open end is then permanently closed, the carton having a side wall in the form of a cover which is initially closed and held by a breakable seal and which is readily released for hinging movement so as to permit the product 'to be dispensed with the cover being reclosable so as to restore the carton to its original condition except for the breakable seal.

A more specific object of the invention is to provide a generally rectangular trunk type carton which is formed from a single blank of paperboard or similar flexible material by cutting and creasing the blank so as to divide the same into a series of connected wall forming panels thereby permitting the carton to be formed or set up initially as a tube with one end closed and the other end ,open for filling and subsequent closing, the carton when fully closed having a body portion and a cover portion, with the body portion comprising a bottom wall and upstanding side and end walls, and with the cover portion hinged along one edge to a top forming edge of one of the body end walls and having connected side and end wall flaps along the other edges which are disposed in the plane of the corresponding walls of the body portion, and the end wall flap of the cover member which is opposite the hinge thereof being secured to the adjacent end wall of the body portion by readily breakable or releasable fastening means so as to permit easy opening of the cover portion for removal of the contents from the carton.

It is a further object of the invention to provide an improved carton of the type which is formed from a blank of paperboard material cut and scored so as to provide wall forming panels which may be connected to form, when initially set up, a tubular container with one end open for receiving the product therein, the open end being then permanently closed and the carton having a side wall in the form of a cover which is initially closed and held by a breakable seal but which may be readily released for hinging movement so as to permit the product to be dispensed through the side of the carton with the cover being reclosable so as to restore the carton to its original condition except for the breakable seal, the initial open end of the carton becoming the front thereof when closed and the cover forming side wall being hinged along one edge to the top edge of the back side wall and having connected side and end wall flaps along the other edges which are disposed in the planes of the end wall and the two adjacent side walls whereby the carton is provided with a side opening, captive telescopic cover.

It is a still further object of the invention to provide a paperboard carton of the type described which employs a minimum of paperboard material so that it may be economically manufactured and which is adapted to be set up and filled by the product manufacturer with only slight modification of the equipment now commonly used for setting up, filling and closing cartons of this type previously available or with new but relatively inexpensive machinery.

These and other objects and advantages of the invention will be apparent from a consideration of the carton structures which are shown by way of illustration in the accompanying drawings wherein:

FIGURE 1 is a perspective view of a carton in the closed condition which embodies the principal features of the invention;

FIGURE 2 is a plan view, to a smaller scale, showing the inside face of a paperboard blank which is cut and scored preparatory to forming the carton;

FIGURE 3 is a perspective view to an enlarged scale showing the carton in set up, tubular condition with the one end open for filling;

FIGURE 4 is a perspective view of one end of the set up carton illustrating the folding of certain of the end wall flapsor panels in closing'the open end of the carton;

FIGURE 5 is a perspective view similar to FIGURE 1 illustrating the carton with the cover swung to a partially .open position'so as to provide access to the interior of the carton;

FIGURE 6 is a perspective view of a modified form of the carton, in closed condition;

FIGURE 7 is a plan view, to a smaller scale, showing the inside face of a portion of a paperboard blank which is cut and scored preparatory to forming the carton of FIGURE 6;

FIGURE 8 is a perspective view of a further modified formof the carton in closed condition;

FIGURE 9 is a plan vieW,-to a smaller scale, showing theinside face of a paperboard blank which is cut and scored preparatory to forming the .carton of FIGURE 8;

FIGURE 10 is a perspective view similar to FIGURE FIGURE 12 is a plan view, to a smaller scale, showing the inside face. of a paperboard blank which is cut and scored preparatory to forming the carton of FIGURE 11; FIGURE 13 is a perspective view showing the carton of FIGURE 11 inset up, tubular condition with certain of the flaps or panels for closing the open side thereof in partially closed position; and

FIGURE 14 is a perspective view similar to FIGURE 11 illustrating the carton with the cover swung to a partially open position. 7

Referring first to FIGURES 1 to 5 of the drawings, the carton 10, which is illustrated, is particularly designed for packaging a product such as bulk ice cream in predetermined quantities, for example, one half gallons, for direct sale to the consumer. used for packaging any other product and it is not intended thatits use be limited to the specific product referred to; The carton ltl will be best understood by reference to the manner in which it is fabricated. A blank 11 (FIG- URE 2) of generally rectangular form is initially cut from The carton 10 may, of course, be

a sheet or web of paperboard or similar flexible sheet material, the blank being nested in the cutting to achieve maximum use of the stock material. The blank forming material may be treated by applying printing or coating to the surface, depending upon the product to be packaged. When used for ice cream a coating of wax, or the like, may be applied to the inside or both surfaces of the sheet material and suitable printing applied to the outside surface. The paperboard may, of course, be a laminate comprising two or more sheets of like or different char acter, printed or unprinted, as desired.

The blank 11 is cut andscored to provide a series of wall forming panels. In its initial form the cut and scored a blank is symmetrical about the longitudinal center line indicated at aa except for two panels at the. one end of the blank which differ as hereinafter described. The

blank 11 is divided by laterally spaced, longitudinally extending, parallel score and cutting

lines

12 and 12 which divide the blank into a center section 13 and two side sections 14 and 14', the latter extending along the side The two sections 14 and 14' which extend along the 4 side margins of the blank 11 are'halved by the

transverse cutting lines

25 and 25 extending from opposite ends of the transverse score line 16 and the halves at the one end of the blank are subdivided by

transverse score lines

26 and 26. extending from the ends of the, transverse score line 15, into side

wall forming panels

27 and 27 and front end wall forming panels orfiaps 28 and 28'. The side wall forming panels 27, 27' extend laterally of the bottom wall forming panel 21 and are integrally hinged thereto on the lines 12 Sand 12'.- .The front end wall forming panels 28 and 28' are freed from the front wall panel 29 on the cuttinglines 3t and 3t) which'constitute end portions of the longitudinally extending lines 12 and '12 so that these panels are integrally hinged to the panels 27 and 2'7'on the score lines 26 and 26'. The one end wall panel 28 is cut away at the end of the blank to provide a hook formation 31 which constitutes a looking or latching hookfor co-operation with .a keeper forming slit 32 cut in the panel 28'. The hook 31 is received inthe opening formed .by the slit 32;when these panels are folded into the plane of the front end wall.- At the opposite end of the blank the halves of the blank side sections 14 and 14' are greatly reduced in width and cut out or slit at 33 and 33 to provide narrow panels or flaps 34 and 34' extending from the back wall panel 22 and equally narrow'panels or flaps 35 and 35' extending outwardly of the top or cover forming panel 23; The panels or

flaps

34 and 34 provide for connecting the ends'of the side wall panels 27 and 27' and. the ends of the back wall panel 22 when the carton is set up. The panels 35 and 35' are hingedly connected to the top wall or cover panel 23 when the carton is set up and constitute cover side wall members. The corners of the blank are notched out at 36 and 36 as shown to free the cover front wall or flap member 24 from the cover side wall panels 35 and 35'. The

end portions

37 and 37 of'the

longitudinal score lines

12 and 12 are offset outwardly a slight distance to facilitate folding of the blank and setup of the carton. Eitherprior to setting up or during the setting up of the carton adhesive is applied to the panels 35 and 35' at 38 and 38'while adhesive is also applied to the outside surfaces of the panels 34 and 34' or to the inside of

panels

27 and 27 as indicated at 39 and 3?. v

In using the carton, the blank 11 is first folded and set up into tubular form as illustrated in FIGURE 3, the panels 34 and 34' being disposed on the inside, of the side wall panels 27 and 27' and the panels 35 and'35' be ing disposed on the outside of the side wall panels ZIand 27'. The adhesive areas 3 8 and 38' which are provided on the narrow cover

side wall panels

35 and 35 may be omitted if provision is made for hold ng these panels against the'walli panels 27 and 27' whenthe carton is 7 set up and until the filling and closing is completed. With the carton in the condition shown in FIGURE 3 it is filled with the product to be packaged through the open upper end, the front end wall forming panels. being'held if necessary, so as not to interfere with the filling operation. The product receiving end is then closed by first folding the panel 21) about its hinge line 1 5 into the plane of the finon-t wallso as to provide; an unbroken inner surface for engagement with the; product. The panel 24 is then hinged about the score line 13' into overlapping engagement with the marginal portionat the free end of the panel 20. followed by folding of the panels '28 and 28' with the locking tongue or hook 31 being engaged in the looking slit 32 as the hook bearing panel 28 is folded down into overlapping cngagernentwith the outside face of the panel28'. The filled carton is'then, in the condition shown in FIGURE land ready for delivery to the user.

In opening t-hecarton'for removal of the con-tents it is intended that, the side wall 23,.sh0uld be swung about the hinge forming crease line 17 after the

panels

35 and 35 have been released by breaking the seals formed by the adhesive areas 38 and3 8'. This provides access to the contents of the carton through the largest side thereof and also provides a hinged cover which may be reclosed to protect the remaining contents when the entire contents is not removed during the use of the package.

The modified form of the carton which is illustrated at 49 in FIGURE 6 employs a blank 41 which is show-n in part only in FIGURE 7. Since the'blank 41 is cut and creased in the same manner as the blank 11 except for the addition of certain panels at the cover forming end thereof cor-responding elements of the two blanks will be identified by the same numerals. The end portion of the blank 41 is cut and creased to provide a cover front wall panel 42 and corner connecting flaps or tabs 43 and 43' which extend outwardly of the cover front Wall panel 42 and which are divided therefrom by the hinge forming crease lines 44 and 44' which constitute the end portions of the hinge lines 12 and 1-2. The corner connecting flaps 43 and 43' are freed from the cover slde wall panels 34 and '34 on the cutting lines 45 and 45' extending from the ends of transverse crease line d8.

The carton 40 is set up for filling in the same manner as illustrated in FIGURE 3. However, in closing the end wall forming panels after the carton is filled the cover front wall panel 42 is held in the plane of the top wall forming panel 5.23 until all of the other end wall panels are closed after which'it is hinged downwardly about the crease line 18 into engagement with the overlapping end wall panels 28 and 28' and the corner connecting tabs '43 and 43 which have been provided with an adbesive are then folded down about the crease lines 44 and 44' into adhering engagement with the cover side wall panels 34- and 34' so as to form the cart-on as shown in FIGURE 6. This arrangement connects the ends of the cover front wall panel 42 to the front ends of the cover side wml panels 34 and 34' so as to impart greater rigidity to the front portion of the reclosing telescoping cover.

The form of the carton which is shown at 50 in FIG- URE 8 is derived from a blank :51 which is cut and scored as shown in FIGURE 9. The blank 51 which is sym'mmetrical about a longitudinal center line b b is divided longitudinally by the transversely spaced, longitudinally extending score lines 52 and 52' into a center section 53 and side sections 54 and 54'. Transverse, longitudinally spaced

score lines

55, 56, 57 and 5S divide the center section 53 into an end wall forming panel 60,

side or bottom wall forming panel 61, end or back wall forming panel 62, top wall or cover forming panel 63 and a cover front Wall panel or flap 64 extending at the end of the blank.

The

side sections

54 and 54 of the blank are cut on the lines 65 and 65' which extend laterally from the ends of .the transverse score line 56 and the portions of these sections at one end of the blank are subdivided by the transverse score lines 66 and r66, which extend laterally of the transverse score line 55, to provide side

wall forming panels

67 and 67 extending laterally of the bottom wall forming panel 61 and end Wall forming panels or flaps 68 and 68'. The end wall panels 63 and 68' are hingedly connected to the. side wall panels 67 and 67' along the score lines 66 and 66 and are freed from the end wall panel '60 by cut-ting lines 7% and 79' which coincide with the end portions of the longitudinal score lines $2 and 52'. The corners of the blank are cut out at 71 and 71' to reduce the width of the end Wall panels as and 6%. The panel 68 is out at the end of the blank to form a locking tongue or hook formation 72 while the panel 68 is cut at 72' to form a locking slit for cooperation with the locking hook 72. At the other end of the blank the side sections 54 and 54' are reduced in width, notched out at '73 and 73' to provide narrow panels 74- and 74 extending on opposite sides of the back wall panel 62 and cover

side Wall panels

75 and 75 which extend laterally of the cover or top wall forming panel at their ends to provide corner connecting flaps 76 and 76' which are separated firom the ends of the panels 75 and 7 5 by hinge forming

score lines

77 and 77, the latter extending from the ends of transverse score line 58. The

corner connecting flaps

76 and 76 are freed from the end flaps 64 by the notched out portions 78 and 78'. The cover front wall panel 64 has a somewhat greater width than the panels 75 and 75' and the Width of this panel is also greater than the reduction in width of the panels 68 and '68 due to the cutting thereof at 71 and 7-1. Adhesive is applied to the corner connecting flaps '76 and 76, the panels 74 and 7 or the ends of

panels

67 and 67 as indicated and also to the areas 79 and 79' on panels 75 and 75'. Y

The blank 51 is set up into tubular carton form in the a same manner as described with reference to the blank 11 with the panels 7-4- and 74, being adhesively connected to the panels 67 and 67'. The set up carton is filled with a product which is to be packaged and the open end of the carton is closed. The

end'wall panels

6d, 64, 68 and 68 are folded into the plane of the end walls in the same manner with the adhesive coated

corner connecting tabs

76 and 76 being folded last into engagement with the outside corners of the end wall panel 64 which places the filled carton 55 in the condition illustrated in FIGURE 8. When the carton 5% is opened by breaking the seals on the

panels

75 and 75 and hinging the panel 63 about the score line 57 atelescoping reclosa'ble cover having connected side and end walls is provided.

The form of the carton which is illustrated at 8b in FIGURE 11 is fabricated from a generally rectangular blank 81 (FIGURE 12) which is cut and scored to divide the same into Wall forming panels. The blank 81 is symmetrical about the longitudinal center line cc and is divided by longitudinally extending, parallel, transversely spaced score lines 82 and 82' into a center section s-Z and two side sections 84- and 84'. The center section 83 is sub-divided by longitudinally spaced, parallel, transversescore lines 85, 8d, 87 and 88 into a front wall forming panel 90, a bottom wall forming panel 91, a back Wall forming panel 92, a top Wall or cover forming panel 9 3 and a front Wall and tear strip forming panel 94-. The front wall forming panel 99) is notched or cut at 95 and 95. The cover front wall panel 9 5 at the other end of the blank is cut to provide a transverse tear strip 96. The two side sections $4 and 34 of the blank are divided by'cutting lines 97 and 97' extending from the ends of the transverse score line 86. The portions of the end sections 55% and $4 at the Wide end of the blank are subdivided by the transverse score lines 98 and??? extend ing from the ends ofthe transverse score line 85 into side or end wall forming panels 1% and 1th? and front wall forming'panels of flaps Tilt and 101'. The front wall panels or flaps 1M and lttlll are separated from the front wall forming panel 96' in the center section 83 of the blank on cutting lines Th2 and 102' which coincide with the ends of the

longitudinal score lines

82 and 82. The portions of the side sections 84 and 34- at the other end of the blank are reduced in width and sub-divided by notches N3 and 163' so as to provide panels or connecting flaps 1M and see extending from the ends of the back wall 92 and the side or end wall wall forming panels ltd and 1%" extending from the ends of the top wall or cover panel 93. Qorner connecting tiaps res and 166' are provided on the ends of the cover end Wall forming panels 1% and M5 which are adapted to hinge about the transverse score lines 167 and it)? extending from the ends of the transverse score line 3% in the center portion of the blank and are separated from the front wall forming panel 94 by notches 108 and 1%. Adhesive areas 110 and Hit are preferably provided on the cover end Wall forming panels 1'95 and i695 and the panel 94 is provided with the adhesive areas 111, 112, and 112.

' Adhesive is also provided 100 and 100'.

anaemia v r at 3113 and 113 on the panels 'whenset up for opening of the cover forming panel 93.

The front side wall panels 9%, 94 and $8 and 98' are allowed to remain in the plane of the adjoining wall P3111 els or held against interference during the operation. In closing the open side or end after the carton is filled the panels 1691 and fill are first folded onto the top of the product with the corner connecting tabs 1% and 196 being folded preferably with the panels fill and fill. The panel 96) is then folded into overlying relation with the panels 101 and fill and the panel 9 is folded into overlapping relation with the margins of the panel d ll so as to bring the filled carton till into the condition shown in FIGURE 11.

Iri using the carton 80, the tear strip 95 is first removed and the cover end walls W5 and 1105' are pulled outwardly a suflicient distance to break the seals formed by the adhesive areas 119 and Ltd. This leaves the carton with a reclosable, telescoping cover comprising rigidly connected top wall 93, end walls Hi5 and 1% and front wall 94 as shown in FIGURE 14. With this arrangement of the carton the product may be dispensed from the broadest side of the carton.

In all the forms of the carton illustrated one of the larger walls constitutes the bottom wall (21, st; 1) when the carton is positioned on a supporting surface for opening-and removal of the contents through the top, the oppositely disposed wall which constitutes the top or'cover wall (23, 63,93) being hinged for opening about the top edge of one of the four upstanding side walls (22, 62, 92) which in two of the illustrated forms of the carton is a short side wall (22, 62) and in the third form thereof is a long side wall (92). In describing the several forms of the carton, the shortest of the upstanding side walls have been referred to as end walls for convenience in description. Also, the upstanding wall to which the cover forming top wall member is hinged has been referred to as'the'back wall and the opposite wall has been referred to as the front wall. It will be understood that the terms used are relative and that changes in the relative dimensions of the cartons are not precluded thereby.

While specific deails of construction and particularmaterials. are referred to in describing the illustrated forms of the carton, it will be understood that other structural arrangements and equivalent materials may be resorted to within the spirit of the invention.

I claim:

1. A generally rectangular paperboard f container formed from a cut and scored paperboard blank which is folded and adhesively connected so as to initially form a tubular container of rectangular cross section with one sideclosed and the opposite side open for filling, the open side becoming the front wall when the filled and closed container is positioned for opening, and the filled and closed container when positioned for opening, comprising a body forming portion and a side opening cover forming portion, saidbody forming portion comprising a bottom wall, upstanding front and back walls integrally hinged thereto and upstanding connecting side walls each comprising a panel hinged to the edge ofthe bottom wall, corner connecting flaps hinged to the end edges of the back wall and connected to the inside faces of adjoining side walls, front wall forming flaps hinged to the front edges of thebody side walls and folded into the plane of the front Wall, said container cover forming portion comprising a top wall integrally hinged to the body back wall, a depending front wall and depend- 8 1 ing narrow connecting side walls,said cover front wall overlying thetop' margin of the frontwall of the body portion and being connected thereto byreadily separa ble fastening means,'said cover'sidelwalls each compris ing a panel hinged to the top wall and a corner connecting flap hinged to the front vend edge of eachsaid panel and secured beneath the end portions of the cover front wall and said body front Wall having portions cut away along the top margin thereof to accommodatethe co.r ner connecting flaps whichvare secured to the coverfront wall "whereby the front wall of the body portion has a uniform two ply thickness atthe upper margin beneath the overlying cover front wall. 1 2. A generally rectangular paperboard container formed from .a cut and scored paperboard blank which is folded and adhes'ively. connected so as to initially form a tubular container of rectangular cross section with one side closed and the other's'ide open for'filling, the open side being closed when the container is filled so that'it becomes the frontwall of'the fillcd'container when the container is positioned for opening and the closed container when positioned for opening, comprising a body forming portion and a side opening cover forming portion, said body forming portion including a bottom wall, upstanding front and back-wallforming panels integrally hinged thereto and connecting side walls each comprising a panel'hingedto the edge of the bottom wall, corner connectingflaps hinged to the end edges of the back wall and connected to the near ends of the adjoining side walls, and front wall forming flaps hinged to the front edges of said side walls and folded into the plane and inside ofsaid front wall'panel, said container cover forming portion comprising a top wall which is integrally hinged along an edge thereof to the top edge of the back side wall of the body portion, a cover front wall hinged along an opposite edge of said top wall and overlying the top margin of the front wall of the body portion and relatively narrow wall forming panels hinged to the adjoining edges of the top wall and overlying top marginal'portions of the corresponding side walls of the body portion with a corner connecting flap hinged to the end edge of each of said narrow wall forming panels and secured to the cover front wall.

3. A carton as recited in claim.;2, and said front Wall forming panelof said body forming portion being disposed on the outside of said front wall forming flaps and having top'marginal portions thereof cut away at the corners to accommodate the corner connecting flaps which are secured to the cover front wall.

4. A carton formed from a paperboard blank which is cut and scored so that it'may be formed into a tube of rectangular cross section and closed by a wall panel at one cndwhichis integral with two adjacent oppositely disposed wall panels for filling through the other end which. 'isthe'reafter closed and which becomes the front wallwhen the filled and closed carton is positioned for opening, said carton in closed condition and positioned for opening having b'ody and cover forming portions with 7 tical frontedges of the body side walls and folded into engagement. with the inside face of the front wall'panel which is hinged to the bottom wall, said cover forming portion comprising a top wall which is integrally hinged to the top edge of the back wall, a pairof narrow cover side walls hinged to opposite edges of said top wall which adjoin the back wall edge, a cover front Wall panel integrally hinged to the front edge of said top wall and corner flaps connecting the cover side walls and front Wall panels, said cover front wall panel overlying the top margin of the body front wall panel and having a readily rupturable connection therewith.

5. A carton as recited in claim 4 and said cover side wall panels being secured to the body side wall panels by rupturable adhesive seals.

6. A carton formed from a paperboard blank which is cut and scored so that it may be formed into a tube having a rectangular cross section and closed at one end for filling through the other end which is thereafter closed, the closed end being formed by a panel which is integral with oppositely disposed side walls and which becomes the back wall of the filled and closed carton when positioned for opening with the filling end becoming the front wall, said carton in closed condition and in position for opening having body and cover forming portions with the cover forming portion closing a side wall and being adapted to be opened by hinging movement, said body portion comprising a bottom wall, a back side wall integrally hinged to the back edge of the bottom Wall, side walls integrally hinged to opposite side edges of the bottom wall, corner flaps hingedly connecting opposite ends of the back wall and adjoining ends of the side walls, a front wall panel integrally hinged to the front edge of the bottom wall, and a pair of front wall panels integrally hinged to the front edges of the body side walls and folded into face engagement with the inside face of the front wall panel which is hinged to 10 the bottom wall, said cover forming portion comprising a top wall which is integrally hinged to the back side wall, a pair of narrow side wall panels hinged to opposite edges of said top wall and overlying the top margins of the corresponding body walls, a front wall panel integrally hinged to the front edge of said top wall, corner connecting flaps extending from said narrow side wall panels and secured inside said cover front wall panel, said body front wall panel lying on the outside of the body portion and having its upper corners cut out to provide pockets for accommodating said corner connecting flaps, said cover front Wall panel overlying the top margin of the body front wall panel and said cover front wall panel having a connection with said body front wall panel which is readily broken.

References Cited by the Examiner UNITED STATES PATENTS 1,985,990 1/35 Hanson 22933 2,218,509 10/40 Goodyear.

2,680,558 6/54 Mai 229-51 2,835,378 5/58 Sramek 229-51 3,000,548 9/61 Frazier 229-51 3,018,942 1/ 62 Arneson 229-51 3,019,959 2/ 62 Skowronski 229--5 1 3,109,577 11/63 Knipp 22.9-51

FRANKLIN T. GARRETT, Primary Examiner.

Claims

1. A GENERALLY RECTANGULAR PAPERBOARD CONTAINER FORMED FROM A CUT AND SCORED PAPERBOARD BLANK WHICH IS FOLDED AND ADHESIVELY CONNECTED SO AS TO INITIALLY FORM A TUBULAR CONTAINER OF RECTANGULAR CROSS SECTION WITH ONE SIDE CLOSED AND THE OPPOSITE SIDE OPEN FOR FILLING, THE OPEN SIDE BECOMING THE FRONT WALL WHEN THE FILLED AND CLOSED CONTAINER IS POSITIONED FOR OPENING, AND THE FILLED AND CLOSED CONTAINER WHEN POSITIONED FOR OPENING, COMPRISING A BODY FORMING PORTION AND A SIDE OPENING COVER FORMING PORTION, SAID BODY FORMING PORTION COMPRISING A BOTTOM WALL, UPSTANDING FRONT AND BACK WALLS INTEGRALLY HINGED THERETO AND UPSTANDING CONNECTING SIDE WALLS EACH COMPRISING A PANEL HINGED TO THE EDGE OF THE BOTTOM WALL, CORNER CONNECTING FLAPS HINGED TO THE END EDGES OF THE BACK WALL AND CONNECTED TO THE INSIDE FACES OF ADJOINING SIDE WALLS, FRONT WALL FORMING FLAPS HINGED TO THE FRONT EDGES OF THE BODY SIDE WALLS AND FOLDED INTO THE PLANE OF THE FRONT WALL, SAID CONTAINER COVER FORMING PORTION COMPRISING A TOP WALL INTEGRALLY HINGED TO