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Publication numberUS3307770 A
Publication typeGrant
Publication dateMar 7, 1967
Filing dateJul 26, 1965
Priority dateJul 26, 1965
Publication numberUS 3307770 A, US 3307770A, US-A-3307770, US3307770 A, US3307770A
InventorsWysocki Lawrence S
Original AssigneeWaldorf Paper Prod Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Butter cartons and the like
US 3307770 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

March 7, 1967 L. s. WYSOCKI BUTTER CARTONS AND THE LIKE 2 Sheets-Sheet 2 Filed July 26, 1965 INVENTOR 1444/90/65 5 Wysocm BY Y L rm TTORNEY shape.

United States Patent Ofifice 3,307,770 Patented Mar. 7, 1967 3,307,770 BUTTER CARTONS AND THE LIKE Lawrence S. Wysocki, Chicago, Ill., assignor to Waldorf Paper Products Company, St. Paul, Minn., a corporation of Minnesota Filed July 26, 1965, Ser. No. 474,605 Claims. (Cl. 229--51) This invention relates to an improvement in cartons for butter and the like and deals particularly with a carton which may be easily opened and reclosed.

Butter, oleomargarine, and the like is often packaged in rectangular wrapped sticks of product, each of which normally contains one-quarter pound of the product. The product is then enclosed in an outer rectangular coated carton which is often heat sealed in closed position. As it is desirable to tightly seal the cartons to preserve the product until it is used, difficulty is often encountered in opening the cartons. If aknife is used to separate the closing flaps, care must be taken not to puncture the wrapped product within the carton. Normally one stick of the product is removed at a time, and with the usual sealed cartons, there is no way to reclose them effectively once they have been opened.

It has been found that by forming a carton in the form of a rectangular tube having overlapping front panels, and closure flaps on all of the panels, folded to form side wall closures, with the closure flaps attached to the top or cover panel folded outwardly of the other flaps and the front panel attached to the top or cover panel lying outwardly of the front panel attached to the bottom panel, an effective package for the product may be formed. Furthermore, by providing weakened lines of separation extending across the top panel closure flaps and a score line extending across thetop panel connecting the ends of the weakened line, a hinged lid may be provided which may be readily swung into open position. By attaching the closure flaps of the outer front panel to the portions of the top wall closure flaps forwardly of the weakened lines, the hinged lid maintains its angular By leaving the closure flaps on the inner front wall panel freeof attachment with the other closure flaps, the inner front wall may be folded forwardly to further increase the size of the opening.

A feature of one form of construction of the invention lies in the provision of a'carton having a pair of closure flaps hingedly connected to the top panel and having a front panel hinged to the top panel and lying outwardly of the inner front wall panel of the carton. A pair of weakened lines of separation extend across these closure flaps from the forward corners of the closure flaps at the lower edges thereof to a point spaced from the forward end of the cover panel. A fold line connects the end of the weakened lines of separation, extending across the cover panel parallel to the forward edge thereof. By tearing the flanges along the weakened lines of separation, a lid having generally triangular side walls is produced which may be swung up to reveal the contents.

A feature of a modified form of construction of the carton lies in the fact that the diagonal weakened lines of separation may extend diagonally upwardly from a point spaced from the forward end of the carton to produce, when opened, a larger opening to simplify the removal of the carton contents.

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

In the drawings, forming a part of the specification,

FIGURE 1 is a perspective view of the carton in closed condition.

FIGURE 2 is a perspective view of the carton in partially opened position.

FIGURE 3 is a perspective view of the carton in fully opened position.

FIGURE 4 is a diagrammatic view of the blank from which the carton is formed.

FIGURE 5 is a perspective view of a modified form of carton in closed position.

FIGURE 6 is a view of a similar carton in open position.

FIGURE 7 is a diagrammatic view from which the carton of FIGURES 5 and 6 is formed.

The carton is illustrated in general by the letter A. As indicated in the drawings, the carton includes a front panel 10, a bottom panel 11, a rear panel 12, a top panel 13, and a front cover panel 14, the panels being connected along parallel fold lines 15, 16, 17, and 19. As will be understood, the description of the various panels is merely to orient the panels as they are illustrated in FIGURES 1 to 3 of the drawings. In other words, the carton is often used in an erect position where the panel 12 forms the bottom panel. The front wall 10 is provided at opposite ends with a pair of closure flaps or corner flaps 20, the flaps 20 being connected to the panel along a pair of parallel fold lines 21 and 22. As indicated, the flaps 20 are preferably rounded as indicated at 23, the center of curvature being substantially at the juncture of the fold lines 21, 22, and 15. When the carton is erect, this center of curvature is substantially aligned with the fold line 15 connecting the panels 10 and 11. The bottom panel 11 is provided with closure flaps 24. The rear wall 12 is provided with corner flaps or closure flaps 25 while the top panel 15 is provided with closure flaps 26. The flaps 24, 25, and 26 are foldably connected to their respective panels along extensions of the fold lines 21 and 22.

The top panel 13 is provided with a transverse fold line 27 extending at right angles to the fold lines 21 and 22 and connecting the same. Perforated lines or other weakened lines of separation 29 extend diagonally from the ends of the fold line 27 to the end edges 30 of the flaps 26. The outer ends of the weakened lines 29 terminate in closely spaced relation to the end edges 31 of the flaps 26. v

The cover front panel 14 is connected along extensions of the fold lines 21 and 22 to substantially triangular closure or corner flaps 32. The corner flaps 32 are of approximately the same shape as thearea of the closure flaps 26 lying between the diagonal weakened lines 29, the flap edges 31 and the fold lines 21, 22. The corner flaps 32 are later secured in face contact with those triangular areas of the flaps 26.

A pair of spaced score lines 33 may extend across the cover front panel 14 at right angles to the fold lines 21, 22. These score lines tend to stiffen the panel 14 and to prevent the flange from bulging outwardly.

In the closing of the cartons, the cartons may be folded into tubular form, usually about the product; until the cover panel 14 lies outwardly of and in surface contact with the inner front panel 10. If desired, heat and pressure may be provided to lightly seal these two panels together, although this is not necessary.

The flaps 20 and 25 are next folded into a common plane, the flap 24 holded to overlie the flaps 20 and 25, the flaps 32 folded to lie outwardly of the flaps 24, and heat and pressure supplied to adhere the flaps 26 to the underlying flaps 24 and 32.

When it is desired to open the carton, the paperboard is split along the weakened lines 29 and the portion of the cover panel 13 which is between the fold lines 19 and 27, together with the cover front panel 14, corner flaps 32, and the triangular areas of the flaps 26, provide (J a lid which may be folded back in the manner illustrated in FIGURE 2 of the drawings.

The distance between the fold lines 19 and 27 preferably exceeds one quarter the width of the top panel 13 so that an entire stick of product is visible when the carton is used to contain butter or oleomargarine. If it is preferred, the front panel 14 may be swung down into the plane of the bottom panel 13 as indicated in FIGURE 3 of the drawings to provide better access to the contents.

The carton B which is illustrated in FIGURES 5 through 7 of the drawings is virtually identical to the structure previously described with the exception of the fact that the carton B is provided with a larger dispensing opening. Cartons B are of the type used for containing six rectangular sticks of product in side-by-side relation, rather than the four sticks of product contained in carton A.

The carton B includes a front panel 35, a bottom panel 36, a rear panel 3'7, and a top panel 39 which are connected along parallel fold lines 40, 41, and 42,. A cover front panel 43 is hingedly connected to the forward edge of the top panel 39 along a fold line 44. Closure flaps are connected to all of the panels along a pair of parellel fold lines 45 and 46 which intersect the previouslydescribed fold lines at right angles.

The front panel 35 is provided with a pair of closure flaps 47. The bottom panel 36 is provided with closure flaps 49. The rear wall panel 37 is provided with a pair What is claimed is:

1. A carton for butter and the like including:

an inner front panel, a bottom panel, a rear wall panel, a top panel, and an outer front wall panel hingedly connected along parallel fold lines,

closure flaps hingedly connected to opposite side edges of said panels, v,

the closure flaps on said outer front panel being folded outwardly of the closure flaps on said bottom panel and inwardly of said closure flaps of said top panel,

said closure flaps on said top panel being secured in face contact to the exposed area of said bottom panel closure flaps and to said outer front wall closure flaps,

weakened lines of separation extending across said top panel closure flaps from top to bottom thereof beyond the ends of said outer front panel closure flaps, and

a fold line extending across said top panel connecting the upper ends of said weakened lines and parellel to the lines of fold connecting said top panel to said rear wall panel and said outer front wall panel.

2. The structure of claim 1 and in which the areas of said top panel closure flaps forwardly of said weakened lines are of substantially triangular shape, and said outer of closure flaps 50. The top panel 39 is provided with a pair of closure flaps 51. The cover front panel 43 is provided with a pair of corner flaps 52.

The top panel 39 is divided into two sections 53 and 54 by a fold line 55 which extends across the panel 39 at right angles to the fold lines 45 and 46. A pair of weakened lines of separation 56 extend diagonally across the closure flaps 51, the weakened lines 56 being inclined toward the forward ends of the flaps 51. The front flange 43 may be provided with a pair of score lines 57 extending thereacross. The weakened lines 56 divide the flaps 51 into two substantially trapezoidal areas.

In forming the carton B, the flaps 47 and 50 are folded into a common plane and the bottom wall flaps 49 are folded outwardly thereof. The corner flaps 52 are then folded to overlie the ends of the flaps 49. The closure flaps 51 are then folded over the exposed area of the flaps 49 and the entire area of the corner flaps 52 and are secured in this position.

While the cartons have been described as being heat sealed together, obviously an adhesive could be used if it were preferred. It should be noted that in both forms of construction, the inner front panel closure flaps 20 and 47 project beyond the periphery of the outer front wall panel, permitting the individual folding of these flaps.

When it is desired to open the cartons B, it is only necessary to rip the closure flaps 51 along the weakened lines 56 at which time the forward portion 54 of the top panel 39, together with portions of the closure flaps 51, the front cover flange 43, and the corner flaps 52 may form a lid which may be folded to expose the contents.

In accordance with the patent statutes, I have described the principles of construction and operation'of my improvement in cartons for butter and the like; while I have endeavored to set forth the best embodiment 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.

front wall closure flaps are similarly shaped.

3. The structure of claim 1 and in which the areas of said top panel closure flaps forwardly of said weakened lines are substantially trapezoidal in shape.

4. The structure of claim 1 and in which the rear panel closure flaps and the inner front panel closure flaps lie inwardly of said bottom panel closure flap.

5. A carton for Butter and the like including:

an inner front panel, a bottom panel, a rear wall panel,

a top panel, and an outer front panel hingedly connected along parallel fold lines,

closure flaps hingedly connected to opposite side edges of said panels, the closure flaps on said outer front panel being folded outwardly of the closure flaps on said bottom panel and inwardly of said closure flaps of said top panel,

said closure flaps on said top panel being secured in face contact to the exposed area of said bottom panel closure flaps and to said outer front wall closure flaps,

rear panel closure flaps and inner front panel closure flaps lying inwardly of said bottom panel closure flaps,

said inner front panel closure flaps having an arcuate edge, the center of arcuation being substantially aligned with the line of fold connecting said front panel to said bottom panel,

weakened lines ofseparation extending across said top panel closure flaps from top to bottom thereof beyond the ends of said front panel closure flaps, and

a fold line extending across said top panel connecting the upper ends of said weakened lines and parallel to the lines of fold connecting said top panel to said rear wall panel and said outer front wall panel.

References Cited by the Examiner UNITED STATES PATENTS 340,904 4/ 1886 Auchterlonie. 2,801,785 8/1957 Manizza 229-36 X 2,980,316 4/1961 Buttery et al 229--51 X 3,108,733 10/1963 Tyrseck et al 20657 X 3,144,191 8/ 1964 Saidel 229-S 1 X GEORGE O, RALSTON, Primary Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US340904 *Feb 6, 1886Apr 27, 1886 Lonie
US2801785 *Jul 30, 1953Aug 6, 1957Continental Can CoBox
US2980316 *Nov 9, 1959Apr 18, 1961Kvp Sutherland Paper CoCarton
US3108733 *Oct 10, 1960Oct 29, 1963Robertson Paper Box Company InEnd open box
US3144191 *Oct 6, 1961Aug 11, 1964Integral Packaging CompanyReclosable carton
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4732276 *Aug 28, 1987Mar 22, 1988Maschinenfabrik Alfred Schmermund Gmbh & Co.Hinged-lid package
US4817861 *Feb 24, 1987Apr 4, 1989Henrikson Gregory AFile storage carton
US5441698 *Sep 10, 1993Aug 15, 1995Beckman Instruments, Inc.Bevel closure and device
US5725146 *Oct 25, 1996Mar 10, 1998Arnold BersonBox with raised structurally enhanced top cover having vent openings
US5747351 *Jun 7, 1995May 5, 1998Smithkline Diagnostics, Inc.Immunochemical-based test device with lift and twist specimen full tab
US5877028 *Mar 31, 1993Mar 2, 1999Smithkline Diagnostics, Inc.Immunochromatographic assay device
US5998220 *Feb 10, 1994Dec 7, 1999Beckman Coulter, Inc.Opposable-element assay devices, kits, and methods employing them
US6017767 *Jun 5, 1995Jan 25, 2000Beckman Coulter, Inc.Assay device
US6033627 *Nov 17, 1997Mar 7, 2000Smithkline Diagnostics, Inc.Bevel closure assay device housing
US6168956May 29, 1991Jan 2, 2001Beckman Coulter, Inc.Multiple component chromatographic assay device
US6302319 *Mar 27, 2001Oct 16, 2001Igloo Products Corp.Party tray carrier
US6326214 *Mar 3, 1999Dec 4, 2001Yung Hsiang LiuImmunity testing device
US7066333May 8, 2003Jun 27, 2006International Paper CompanyOffice paper end-display shipper display
US8413801Apr 10, 2008Apr 9, 2013International Paper CompanyLidded container with a tear strip
US8459449Oct 13, 2006Jun 11, 2013International Paper CompanyEasy-opening carton for shipping and storing cut paper
Classifications
U.S. Classification229/231, 36/7.10R, 229/131, 229/122
International ClassificationB65D5/54
Cooperative ClassificationB65D5/5405
European ClassificationB65D5/54B