US3690543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding carton
Assignee: Packaging Corp of America
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Filing: 1971-06-24
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Granted: 1972-09-12
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Expires: 1991-06-24
Abstract
Abstract A folding carton is provided which is adapted to assume a collapsed tubular condition when in an unloaded condition. The carton is provided with bottom closure flaps which automatically assume a closed bottom-forming position when the collapsed tubular carton is set up for loading.
Inventors
- 👤 Charles R Zeitter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:17
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/36; B65D5/3607; B65D5/3614; B65D5/3621
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
252 words
A folding carton adapted to assume a collapsed tubular condition and provided with an automatic bottom closing feature when said carton is set up for loading, said carton comprising two pairs of opposed walls foldably connected so as to define a tube when said carton is set up; a first set of closure flaps foldably connected to the lower end limits of a first pair of opposed walls, each flap of said first set having a first section foldably connected to the lower end limit of a wall of The first pair, and a second section foldably connected to said first section and in fold-back relation with respect thereto, when said carton assumes a collapsed tubular condition; and a second set of closure flaps foldably connected to the lower end limits of a second pair of opposed walls, each flap of said second set having a first portion foldably connected to the lower end limit of a wall of the second pair and a second portion foldably connected to said first portion and in fold-back relation with respect thereto, when said carton assumes a collapsed tubular condition; the second section and the second portion of adjacent closure flaps being affixed to one another and disposed in sandwiched relation with the first section and the first portion of said adjacent closure flaps when said carton is in a collapsed tubular condition; the first sections of said first set of closure flaps being in interlocking relation when said carton is set up for loading.
Claim 2
Dependent Claim
252 words
A folding carton adapted to assume a collapsed tubular condition and provided with an automatic bottom closing feature when said carton is set up for loading, said carton comprising two pairs of opposed walls foldably connected so as to define a tube when said carton is set up; a first set of closure flaps foldably connected to the lower end limits of a first pair of opposed walls, each flap of said first set having a first section foldably connected to the lower end limit of a wall of The first pair, and a second section foldably connected to said first section and in fold-back relation with respect thereto, when said carton assumes a collapsed tubular condition; and a second set of closure flaps foldably connected to the lower end limits of a second pair of opposed walls, each flap of said second set having a first portion foldably connected to the lower end limit of a wall of the second pair and a second portion foldably connected to said first portion and in fold-back relation with respect thereto, when said carton assumes a collapsed tubular condition; the second section and the second portion of adjacent closure flaps being affixed to one another and disposed in sandwiched relation with the first section and the first portion of said adjacent closure flaps when said carton is in a collapsed tubular condition; the first sections of said first set of closure flaps being in interlocking relation when said carton is set up for loading.
Claim 3
Dependent Claim
77 words
The carton of claim 1 wherein each closure flap of the first set, the first and second sections thereof are interconnected by a first diagonally extending foldline, and in each closure flap of the second set, the first and second portions thereof are interconnected by a second diagonally extending foldline; the second foldline between the first and second portions being in substantial registered relation with a side of the adjacent second section affixed to said second portion.
Claim 4
Dependent Claim
48 words
The carton of claim 1 wherein the second section of each closure flap of the first set is of substantially triangular configuration and with one side thereof foldably connected to the first section and with a second side thereof substantially aligned with a folding connection between adjacent walls.
Claim 5
Dependent Claim
40 words
The carton of claim 3 wherein the first section of each closure flap of the first set has a curved outer edge with one end thereof terminating at the foldline between said first and second sections and forming a notch.
Claim 6
Dependent Claim
30 words
The carton of claim 1 wherein said closure flaps automatically fold back upon themselves and are concealed between the carton walls when said carton is in a collapsed tubular condition.
Claim 7
Dependent Claim
218 words
A blank of sheet material for use in forming a tubular carton having an automatically folded bottom when said carton is set up from a collapsed tubular condition, said blank comprising four elongated wall panels arranged in side-by-side relation and separated from one another by foldlines; first closure flaps foldably connected to the lower end limits of alternate wall panels; and second closure flaps foldably connected to the lower end limits of remaining intermediate wall panels; each first closure flap including a first section having a first side thereof foldably connected to the lower end limit of one of said alternate wall panels, and a second section having one side thereof foldably connected to a second side of said first section, the first and second sides of said first section defining an acute included angle whereby said second section is movable into a fold-back relation with said first section; each second closure flap including a first portion having a first side thereof foldably connected to the lower end limit of one of said intermediate wall panels, and a second portion foldably connected to a second side of said first portion, the first and second sides of said first portion defining an acute included angle whereby said second portion is movable into a fold-back relation with said first portion.
Claim 8
Dependent Claim
218 words
A blank of sheet material for use in forming a tubular carton having an automatically folded bottom when said carton is set up from a collapsed tubular condition, said blank comprising four elongated wall panels arranged in side-by-side relation and separated from one another by foldlines; first closure flaps foldably connected to the lower end limits of alternate wall panels; and second closure flaps foldably connected to the lower end limits of remaining intermediate wall panels; each first closure flap including a first section having a first side thereof foldably connected to the lower end limit of one of said alternate wall panels, and a second section having one side thereof foldably connected to a second side of said first section, the first and second sides of said first section defining an acute included angle whereby said second section is movable into a fold-back relation with said first section; each second closure flap including a first portion having a first side thereof foldably connected to the lower end limit of one of said intermediate wall panels, and a second portion foldably connected to a second side of said first portion, the first and second sides of said first portion defining an acute included angle whereby said second portion is movable into a fold-back relation with said first portion.
Claim 9
Dependent Claim
35 words
The blank of claim 6 wherein the first sides of said first sections and said first portions are substantially coextensive with the lower end limits of the wall panels to which they are foldably connected.
Claim 10
Dependent Claim
28 words
The blank of claim 6 wherein adjacent closure flaps are separated from one another by cuts, each cut being substantially aligned with a foldline separating adjacent wall panels.
Claim 11
Dependent Claim
43 words
The blank of claim 6 wherein the apexes of said acute angles are in spaced relation and each apex is disposed at substantiaLly the lower end limit of one elongated side of the wall panel to which said closure flap is foldably connected.
Claim 12
Dependent Claim
17 words
The blank of claim 6 wherein all of said included angles are of substantially the same size.
Claim 13
Dependent Claim
57 words
The blank of claim 6 wherein the surface thereof forming the interior surface of the set up carton is capable of being bonded to itself, and the opposite surface of the blank forming the exterior surface of the set up carton has a finish rendering same not readily capable of being bonded to itself or another surface.
Claim 14
Dependent Claim
20 words
The blank of claim 6 including top closure flaps foldably connected to the upper end limits of said wall panels.
Claim 15
Dependent Claim
25 words
The blank of claim 6 wherein said first closure flaps are of substantially like configuration and said second closure flaps are of substantially like configuration.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |