Top structure for a collapsible carton

• US 4,981,254 A
• Filed: 05/01/1990
• Issued: 01/01/1991
• Est. Priority Date: 05/01/1990
• Status: Expired due to Term

• Current Assignee: Inland Paperboard and Packaging, Inc. (International Paper Company)
• Original Assignee: Inland Container Corp. (International Paper Company)
• Inventors: Depper, John T.
• Primary Examiner(s): Elkins, Gary E.
• Application Number:
  US07/517,581
• Time in Patent Office: 245 Days
• Field of Search: 229/117.13, 229/117.14, 229/117.16, 229/117.17
• US Class Current: 229/117.14
• CPC Class Codes: B65D 5/46088 formed by extensions of closure flaps, by closure flaps or by extensions of side flaps of a container formed by folding a blank to form a tubular body

Abstract

A carton having a tubular body is provided with an automatic, or nearly automatic, folding top construction, having triple-thickness handles at opposed ends of the carton, upstanding above the carton closure flaps. Two of the three thickness portions of the handles are hinged to the closure flaps and are automatically formed as the closure flaps are folded to a closed position. The remaining layer of the handles includes a hinged flap swung into position overlying the handle layers. As the third layer is swung into position, locking tabs carried by the third layer are received in recesses on the major closure flaps, thus locking the handles and the major closure flaps in a fully closed position.

Claims

1. A carton comprising:

(a) a tubular body with opposed endwalls between a pair of opposed sidewalls, the tubular body surrounding a carton interior and defining a top opening,

(b) a bottom wall,

(c) a pair of opposed cover flaps closing the top opening of the carton, and

(d) upstanding handle means at opposite ends of the carton, extending above the cover flaps, each handle means including;

(1) a first panel defining a handhole, the first panel extending from an end wall and having an upper edge remote from the end wall;

(2) a pair of reinforcing panels extending from the top panels to overlie said first panel, and cooperating to define a hand hole in registry with the first panel hand hole; and

(3) a locking flap defining a hand hole extending from the upper edge of the first panel so as to be foldable over the reinforcing panels and said locking flap having locking means for locking to said cover flaps to maintain the locking flap and the cover flaps in fixed positions.

2. The carton of claim 1 wherein the cover flaps have opposed edges defining notches for interlocking interengagement, one with the other, to hold the cover flaps in a closed position covering the carton interior.

3. The carton of claim 1 wherein the locking flap locking means comprises a lower edge of the locking flap wedged against the cover panels to maintain the cover panels in a closed position, and tabs extending from the locking flap lower edge, receivable in recesses formed in the cover panels to prevent dislocation of the locking flap from the wedging position.

4. The carton of claim 1 wherein the first panel is trapezoidal, the reinforcing panels cooperate to form a trapezoidal configuration, and the locking flap is generally rectangular and dimensioned to overlie a central portion of the reinforcing panels without extending therebeyond.

5. A carton having a tubular body with a pair of opposed endwalls and a pair of opposed sidewalls, generally rectangular end panels extending from the endwalls and generally rectangular side panels extending from the side walls, the end panels being foldable to form upstanding handle means with each handle means including three overlapping handle layers, each end panel including:

a first generally trapezoidal panel portion defining a handhole, extending from an end wall and having an upper edge remote from the end wall;

a pair of reinforcing panels on opposite sides of the trapezoidal panel portion, and hingeably joined thereto so as to abut one another to define a hand hole in registry with the hand hole of the trapezoidal portion when folded thereover; and

a locking flap portion hingeably joined to the trapezoidal panel, between the reinforcing panels, so as to be foldable over said reinforcing panels, said locking flap portion having locking means for locking to said cover flaps and defining a handhole aligned in registry with the hand holes of said reinforcing panels when folded thereover.

6. A blank for a carton having a tubular body surrounding a carton interior and defining a top opening, with a pair of opposed cover panels closing the top opening of the carton, and upstanding handle means at opposite ends of the carton, extending above the cover flaps, each handle means including three overlapping handle layers, the carton blank comprising:

a serial succession of a pair of endwalls interposed between a pair of sidewalls;

generally rectangular cover panels joined by hinge means to the side walls, the cover panels including a free edge remote from the sidewalls and located between a pair of opposing side edges which define locking apertures therein; and

generally rectangular end panels extending from the endwalls, each end panel including;

a first generally trapezoidal panel portion defining a handhole, joined with hinge means to the end wall and having an upper edge remote from the end wall;

a pair of reinforcing panels joined with hinge means to opposite sides cf the trapezoidal panel portion, the reinforcing panels having generally colinear free edges extending generally parallel to the base of the generally trapezoidal panel portion, said reinforcing panels defining recesses at their free edges which cooperate when folded over the trapezoidal portion to define a hand hole in registry with the hand hole of the trapezoidal portion;

hinge means joining the reinforcing panels to opposed side edges of the cover panels, and

a locking flap between the reinforcing panels, joined by hinge means to the trapezoidal panel so as to be foldable over said reinforcing panels, said locking flap having a free edge extending above the colinear free edges of the reinforcing panels, and tab means extending from the free edge of the locking flap so as to be received in said locking apertures.