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Publication numberUS2527167 A
Publication typeGrant
Publication dateOct 24, 1950
Filing dateOct 15, 1947
Priority dateOct 15, 1947
Publication numberUS 2527167 A, US 2527167A, US-A-2527167, US2527167 A, US2527167A
InventorsWauda George E
Original AssigneeMarathon Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2527167 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

0Q2., 22, 2250 G, E, WA'UDA 2,222,227

CARTON Filed Oct. l5, 1947 2 Sheets-Sheet l Il f 0d 2%, QSO G, E. WAUDA 2,527,157

CARTON Filo'l 00t- 15, 1947 2 Sheets-Sheet 2 Patented Oct. 24, 1950 UNITED STATES PATENT OFFICE 4 CARTON George E. Wanda, Neenah, Wis., assigner to Marathon Corporation,

poration of Wisconsin Application October 15, 1947, Serial No. 779,933

2 Claims.

The invention relates to a collapsible carton made preferably from a single blank of cardboard and the like. More specifically the invention relates to a carton having a tray or receptacle portion provided with a hinged cover provided with positive releasable locking means for retaining the cover in closed condition when goods are p'zickaged in the carton.

Further details and advantages of the present invention will be apparent from the following specification and drawings wherein:

Figure l is a plan view of the outer surface of anintegral blank from which the improved carton is formed;

Figure 2 is a perspective view of a fully set-up carton formed from the blank illustrated in Figure 1;

Figure 3 is a sectional view taken along the line 3-3 of Figure 2; 1

Figure 4 is a fragmental, sectional view taken along the line 4-4 of Figure 3;

Figure 5 is a fragmental, vertical, sectional view of the commodity-filled carton illustrating the relationship of the fcover locking means and the cooperating locking flap of the tray, and

Figure 6 is a view similar to Figure 5, illustrating the manner inwhich the cover is releasably locked to the tray.

For the purpose of illustrating the invention, there is shown inthe accompanying drawings a form thereof which is at present preferred,since the same has been found inv'practice to give satisfactory and reliable results, although it is to be understood that the -various instrumentalities of which the invention consists can be variously arranged and organized and that the invention is not limited to the precise arrangements and organizations of the cartonparts as herein shown and described.

Referring to the drawings, the carton is made from an integral blank of paper, cardboard and the like, suitably cut and scored as illustrated in Figure 1 to provide a foldable tray portion, indicated generally by numeral 5 in Figure 2. The tray portion 5 comprises a bottom wall I3, front -wall Il, rear wall I2, and end walls I9. Hinge flaps I8, diagonally scored at 59, are integrally connected to the rear wall I2 and the end walls I9 by score lines 5I and 52, respectively. Preferably, the score line 5U is perforated. The hinge flaps I8 are provided with L-shaped notches Il at their free corners to permit adjacent substantially triangular segments 54 to be glued to the r'ear wall I2. The unadhered segments 55 hinge the end walls I8 to the rear wall I2 along Rothschild, Wis., a corthe score line 50, as illustratedin Figure 2. The segments 54, however, need not be glued to the rear wall I2 to achieve the desired hinging action. End walls I9 are also provided with diagonal score lines 8, which in combination with the scored hinge flaps I8, permit collapsing of the tray portion 5 in fiat folded position.

The front wall I 4 is provided with end flaps 20. Triangular segments 30 of the flaps 20 are adapted to be overlapped and glued to the inner surface of triangular portions 3| of end walls I9. leaving triangular segments 32 of the flaps 20 free and unadhered. When the tray portion 5 is set up from its flat collapsed position illustrated in Figure 2, the free portions 32 of flaps 20 will slide over the bottom panel I3 to assume the final set-up position whereby the tray portion will remain in its fully set-up condition for receiving goods 4D to be packaged therein.

The front wall I4 of the tray portion 5 is provided at its upper edge with an externally folded locking ap I5 integrally hinged to the front wall. The flap I5 is preferably hinged to the wall Il along a score line 33 positioned at the upper edge of the wall I4 so that when flap I5 is bent back it has a tendency to spring outwardly. Locking flap I5, having diagonally cut free side edges 3 and a free forward edge 26, is adapted to engage and lock with coacting portions on a hinged cover portion, indicated generally by numeral 6 in Figure 2. 'I'he cover 6 comprises a top wall II, side walls I1 and a front wall IIJ. The top wall II is integrally hinged to the top of rear wall I2 of the tray portion 5 as shown in Figure 2. Side walls Il are provided with flaps I6, the major areas of which are overlapped and adhered to portions of the front wall I0 of the cover 6. The side walls I1 are also provided with diagonal score lines I to permit co1- lapsing the cover portion into flat condition.

The flaps I6 are recessed or cut along lines 2 and 4 adjacent the front wall I0 so as to provide a substantially L-shaped recessed portion. The sides of the flaps I6 which are to be overlapped and adhered to the front wall I0 of' the cover are coated with adhesive except for the marginal areas 60. To aid in defining the area which is unadhered to the front wall I0, the flap I6 may be cut at 4'. The cut line 4' is preferably a continuation of the line 4 and is approximately oneeighth (M3) inch in length. Thus, when the flaps I6 are overlapped and glued to the inside surface of front wall I 0, pockets 6I are formed by the marginal areas 60 in coniunction with the unadhered, underlying front wall portions, as

shown in Figures 4, 5 and 6. The adhesive may be applied to selected areas of the front wall I!! instead of the flaps I6 so that upon overlapping, the flaps I6 are adhered to the front wall i0 except for the pocket forming portions. Also, the carton material itself may be treated, coated or laminated with suitable compositions or materials which will cause adherence upon the application of heat and pressure. When heat is utilized to obtain adherence between the flaps I8 and the front wall I0, the adjacent surfaces which form the pockets 5I are either masked so that adherence is not obtained at these areas or else the application of heat and pressure is selectively limited to avoid adherence at these areas.

After filling the set-up tray portion 5 shown in Figure 2 with a suitable commodity I0, the cover portion E is placed in closed position as shown in Figure 5. 1n this position, the inwardly bevelled abutment edges 3 of the locking ap I5 will abut and engage with the inclined abutment edges 4 of aps I6. It will be noted that the width B of the locking flap I5 is slightly less than the distance A of the cut line 2 from the top panel Il of the cover 6. The tendency of the flap I5 to spring outwardly on its hinge line 33 will cause the locking flap to be urged against the front wall I of the cover 6. Thus, with the carton closed as shown in Figure 5, efforts to open the carton by movement in the direction of the arrow C, as shown in Figure 6, will cause the leading edge 26 of the locking ap I5 to enter the pockets 6| and positively lock and retain the cover in its closed position, the abutment edges 4 serving to guide the bevelled edges 3 of the locking flap I5. The cover will not open unless considerable force is applied to it upon which the locking flap will hinge upwardly and thus release its locking function without, however, tearing or rupturing any part of the carton as the walls of the carton are suiilciently flexible. The cover 6 can be readily reclosed and locked in closed position as often as may be desired. The construction described permits a positive anchoring or locking action which cannot be obtained by simply abutting the edges of the locking flap with the edges of extension flaps IG.

Numerous modifications may be made in the carton construction previously described which constitutes one embodiment of my invention. The formation of the pockets 6I with respect to the front wall I0 which are adapted to receive the locking ap I can be replaced by other equivaient means. For example, flaps I6 may be replaced by separate tabs, of carton stock or other material of suiiicient stiness, which are not connected to the side walls I1. The locking flap I5 also need not extendthe full length of the upper edge of the wall I5, but may be replaced by two separate flaps hinged adjacent each end of the front wall Il. A separate tab may also be glued at the middle of the front wall I0 of the cover and constructed to provide pocket portions for receiving and engaging with a mating tongue portion hinged at the middle of the upper edge of the front wall Il of the tray portion. The locking construction herein disclosed is obviously not dependent upon the speciilc tray and cover construction illustrated in the drawings and can obviously be applied effectively to any type of carton construction having a tray portion and a cover portion hinged thereto. Some examples of other cartons with which my improved locking construction may be used are disclosed in Patent Numbers 2,369,385 through 2,369,392, issued February 13, 1945, or the pending application of Harold Riege et al., Serial Number 553,414, filed September 9, 1944, now Patent No. 2,437,835 dated March 16, 1948.

The locking construction herein disclosed serves to retain the cover in locked position when the illled with goods cartons are handled. Furthermore, when the filled cartons are to be wrapped in an outer wrapper by automatic machinery the cover will not spring open during the wrapping operations. My carton is thus particularly adapted for making packages which are required to be completely wrapped with a protective wrapper as for example in the case of packaging frozen foods and the like.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

I claim:

1. A collapsible carton formed from a single blank suitably cut, scored and glued to provide a foldable tray having front, rear and side walls, a foldable cover hinged to said rear wall, said front wall having an externally folded locking flap hinged at the upper edge thereof, said cover comprising a top wall, side walls and a front wall. said cover side walls each having a flap extension said flap extensions each being cut to provide re entrant recesses in said nap extensions facing the top wall of said cover and having a cut edge opposed to the longitudinal edge of said locking flap, said flap extensions being overlapped and adhered by an adhesive area to inner portions of said cover front wall, said adhesive being spaced inwardly from said cut edge whereby pocket portions are provided in conjunction with the unadhered underlying cover front wall for receiving portions of said locking flap to thereby retain said cover in releasably locked condition 2. A collapsible carton of paper, cardboard or the like formed from a single blank suitably cut, scored and glued to provide a foldable tray portion having a bottom, a front, a rear and two opposed side walls, end flaps hingedly connected at each end of said front wall, said end flaps being overlapped and adhered to the said adjacent side walls and having free, unadhered portions adapted to slide over said bottom wall and maintain the tray portion in set-up condition, said front wall having an externally folded freely hinged locking ilap extending along the upper edge thereof, said locking ilap being bevelled inwardly of the carton at the ends thereof, fold lines provided in said side walls to permit collapsing of said tray portion into flat collapsed condition, s. foldable cover hinged to the said rear wall adapted to be telescoped over said tray portion for closing same, said cover comprising a top wall, two opposed side walls and a front wall, fold lines provided in said cover side walls to permit collapsing of said cover into hat collapsed condition, said .cover side walls being substantially coextensive of said cover and having aligned out edges und intersecting cut edges extending inwardly for a short distance from said aligned edges, said ap extensions being overlapped and adhered by an adhesive area to inner portions of said cover front Wall, the adhesive area being spaced inwardly from the said aligned cut edges of said ap extensions, which in conjunction with unadhered, underlying cover front wall portions provide pockets, said iiap extensions and hinged locking ap being substantially wholly contained within said cover when the cover is in closed position, portions of said locking ap being arranged to move within said pockets to thereby retain the cover in closed position and to permit swinging open of said cover without rupture of the carton, the Walls of said carton being sulciently exible to permit flexing thereof without rupture of th f 6 material while said hinged locking iiap is under compressive stress during opening of the cover part.


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

UNITED STATES PATENTS Number Name Date 651,070 Enoch June 5, 1900 1,646,665 Smith Oct. 25, 1927 1,928,792 Ottenger Oct. 3, 1933 l5` 2,160,643 Burel May 30, 1939 2,369,385 Carruth et al Feb. 13, 1945

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US651070 *Oct 20, 1899Jun 5, 1900John C EnochCover-fastening for boxes or like articles.
US1646665 *Aug 2, 1926Oct 25, 1927Smith Charles MBox
US1928792 *Jan 11, 1932Oct 3, 1933Nathan OttingerBox construction
US2160643 *Nov 10, 1937May 30, 1939Charles BurelFolding box
US2369385 *Jul 21, 1942Feb 13, 1945Nat Folding Box CoHinged cover container
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2652969 *Dec 3, 1951Sep 22, 1953Marathon CorpCarton
US2961144 *Jul 21, 1958Nov 22, 1960American Box Board CoPilfer-proof box
US3971505 *Nov 8, 1974Jul 27, 1976Hachiro OhkuboContainer
US4018378 *Mar 24, 1976Apr 19, 1977Sprinter Pack AbCarton tray with cover
US4050624 *Nov 29, 1974Sep 27, 1977Williams Donald FOne-piece box with tapered sides and method of making same
U.S. Classification229/117.7, 229/129, 229/145, 229/186, 229/171, 229/190
International ClassificationB65D5/64, B65D5/36, B65D5/66
Cooperative ClassificationB65D5/3642, B65D5/6667
European ClassificationB65D5/36B4A, B65D5/66D2E1A