Reinforced automatic bottom closure

• US 3,899,124 A
• Filed: 11/08/1974
• Issued: 08/12/1975
• Est. Priority Date: 11/08/1974
• Status: Expired due to Term

• Current Assignee: John D. Desmond, Joseph J. Hart
• Original Assignee: John D. Desmond, Joseph J. Hart
• Inventors: Desmond, John D., Hart, Joseph J.
• Primary Examiner(s): Moorhead, Davis T.
• Application Number:
  US05/522,020
• Time in Patent Office: 277 Days
• Field of Search: 229/41R,41B,39R
• US Class Current: 229/117
• CPC Class Codes: B65D 5/10 with end closures formed by inward-folding of self-locking flaps hinged to tubular body
• CPC Class Codes: B65D 5/4608 Handgrip holes

Abstract

A heavy-duty, collapsible carrying carton including an integral handle arrangement and an automatic self-erecting bottom closure arrangement with integral reinforcing means.

Claims

1. In a heavy-duty, collapsible carrying carton adapted to be brought from a collapsed condition to an erected condition by the application of pressure against two diagonally opposed corners thereof and being formed from a unitary blank of foldable paperboard, the combination of:

a. opposed pairs of major and minor side walls hingedly interconnected to form a tubular structure open at the top and bottom;

b. at least one of said major side walls including handle means for grasping and carrying the carton;

c. top and bottom closure means for closing the top and bottom of the carton;

d. said bottom closure means including opposed first and second pairs of closure flaps associated with said pairs of major and minor side walls, respectively;

e. said closure flaps of said first pair each including;

i. a flat, unscored, bottom panel hingedly attached at one edge to a lower edge of a related major side wall and presenting in a medial area thereof a recess adapted to interlock with a corresponding recess in the bottom panel of the other closure flap of said first pair when the carton is in erected condition;

ii. a reinforcing side panel hingedly attached to said bottom panel, at an edge parallel to and opposite from the edge of the bottom panel which is hinged to a major side wall, and disposed to lie against the inner surface of the opposed major side wall when the carton is in an erected condition;

f. said closure flaps of said second pair each including;

i. a first panel section hingedly attached at one edge to a lower edge of a related minor side wall;

ii. a second panel section hingedly attached to said first panel section and in fold-back relation therewith, when said carton is in a collapsed condition;

iii. said second panel section being secured to an adjacent bottom panel and interposed between said first panel section and said bottom panel when the carton is in a collapsed condition.

2. In a heavy-duty, collapsible carton adapted to be brought from a collapsed condition to an erected condition by the application of pressure against two diagonally opposed corners thereof and being formed from a unitary blank of foldable paperboard, the combination of:

a. opposed pairs of major and minor side walls hingedly interconnected to form a tubular structure open at the top and bottom;

b. top and bottom closure means for closing the top and bottom of the carton;

c. said bottom closure means including opposed first and second pairs of closure flaps associated with said pairs of major and minor side walls, respectively;

d. said closure flaps of said first pair each including;

i. a flat, unscored, bottom panel hingedly attached at one edge to a lower edge of a related major side wall and presenting in a medial area thereof a recess adapted to interlock with a corresponding recess in the bottom panel of the other closure flap of said first pair when the carton is in erected condition;

ii. a reinforcing side panel hingedly attached to said bottom panel at an edge parallel to and opposite from the edge of the bottom panel which is hinged to a major side wall, and disposed to lie against the inner surface of the opposed major side wall when the carton is in an erected condition;

e. said closure flaps of said second pair each including;

i. a first panel section hingedly attached at one edge to a lower edge of a related minor side wall;

ii. a second panel section hingedly attached to said first panel section and in fold-back relation therewith, when said carton is in a collapsed condition;

iii. said second panel section being secured to an adjacent bottom panel and interposed between said first panel section and said bottom panel when the carton is in a collapsed condition.

3. In a heavy-duty, collapsible carrying carton adapted to be brought from a collapsed condition to an erected condition by the application of pressure against two diagonally opposed corners thereof and being formed from a unitary blank of foldable paperboard, the combination of:

a. opposed pairs of major and minor side walls hingedly interconnected to form a tubular structure open at the top and bottom;

b. top and bottom closure means for closing the top and bottom of the carton;

c. said bottom closure means including opposed first and second pairs of closure flaps associated with said pairs of major and minor side walls, respectively;

d. said closure flaps of said first pair each including;

i. a bottom panel hingedly attached at one edge to a lower edge of a related major side wall and presenting in a medial area thereof a recess adapted to interlock with a corresponding recess in the bottom panel of the other closure flap of said first pair when the carton is in erected condition;

ii. a reinforcing side panel hingedly attached to said bottom panel, at an edge parallel to and opposite from the edge of the bottom panel which is hinged to a major side wall, and disposed to lie against the inner surface of the opposed major side wall when the carton is in an erected condition;

e. said closure flaps of said second pair each including a panel hingedly attached at one edge to a lower edge of a related minor side wall and secured to an adjacent bottom panel.

4. In a heavy-duty, collapsible carrying carton adapted to be brought from a collapsed condition to an erected condition by the application of pressure against two diagonally opposed corners thereof and being formed from a unitary blank of foldable paperboard, the combination of:

a. opposed pairs of major and minor side walls hingedly interconnected to form a tubular structure open at the top and bottom;

b. top and bottom closure means for closing the top and bottom of the carton;

c. said bottom closure means including opposed first and second pairs of closure flaps associated with said pairs of major and minor side walls, respectively;

d. said closure flaps of said first pair each including;

i. a bottom panel hingedly attached at one edge to a lower edge of a related major side wall and presenting in a medial area thereof a recess adapted to interlock with a corresponding recess in the bottom panel of the other closure flap of said first pair when the carton is in erected condition;

ii. a reinforcing side panel hingedly attached to said bottom panel, at an edge parallel to and opposite from the edge of the bottom panel which is hinged to a major side wall, and disposed to lie against the inner surface of the opposed Major side wall when the carton is in an erected condition;

e. said closure flaps of said second pair each including a side panel hingedly attached at one edge to a lower edge of a related minor side wall;

f. a pair of panel sections each of which is hingedly attached to one of related side panel and bottom panel and being secured to the other of said panels and interposed between said related panels when the carton is in a collapsed condition.