US3581976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking box
Assignee: Domtar Inc
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Filing: 1969-04-02
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Granted: 1971-06-01
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Expires: 1989-04-02
Abstract
Abstract A tray comprising, integrally connected, a bottom panel having bottom side panels and a front panel having front side panels, each front side panel being foldably connected at one edge to a bottom side panel and at its opposite edge to a locking panel, a locking flap formed in each of the bottom side panels and fold lines in said front side panels permitting the front panel and bottom side panels to be moved into erected position perpendicular to the bottom panel and the locking flaps to cooperate with the locking panels to secure the panels in erected position.
Inventors
- 👤 Norman E Burgess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:26
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/64; B65D5/66; B65D5/6626; B65D5/665; B65D5/6652
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
A carton comprising a bottom panel and a front panel interconnected by a first fold line, a pair of bottom side panels foldably connected one to each side of said bottom panel, locking flaps formed by a slit in each of said bottom side panels and connected to said bottom side panels by fold lines, a ledge forming panel foldably connected to said front panel by a fold line substantially parallel to said first fold line, a pair of locking panels, means foldably connecting said ledge forming panel to each of said locking panels whereby said locking panels may be folded substantially perpendicular to said ledge forming panel, a locking hook projecting from a side edge of each said locking panel remote from said front panel, each said locking flap being foldable out of the plane of its respective bottom side panel on its said fold line connecting same to its respective bottom side panel into a position overlying said locking hook on its adjacent said locking panel.
Claim 2
Dependent Claim
168 words
A carton comprising a bottom panel and a front panel interconnected by a first fold line, a pair of bottom side panels foldably connected one to each side of said bottom panel, locking flaps formed by a slit in each of said bottom side panels and connected to said bottom side panels by fold lines, a ledge forming panel foldably connected to said front panel by a fold line substantially parallel to said first fold line, a pair of locking panels, means foldably connecting said ledge forming panel to each of said locking panels whereby said locking panels may be folded substantially perpendicular to said ledge forming panel, a locking hook projecting from a side edge of each said locking panel remote from said front panel, each said locking flap being foldable out of the plane of its respective bottom side panel on its said fold line connecting same to its respective bottom side panel into a position overlying said locking hook on its adjacent said locking panel.
Claim 3
Dependent Claim
38 words
A carton as defined in claim 1 further comprising a rear panel foldably connected to said bottom panel and a top panel foldably connected to said rear panel by fold lines substantially parallel to said first fold line.
Claim 4
Dependent Claim
109 words
A carton as defined in claim 2 further comprising top side panels foldably connected one at each side of said top panel, a locking slot extending in from the free side edge of each said top side panel adjacent the free end edge thereof and forming a locking tab between said slot and said free end edge, said slit and said slot cooperating to permit each said top side panel to be positioned on one side of its adjacent said bottom side panel with each said locking tab being positioned on the other side of said adjacent bottom side panel thereby to lock said top panel in closed position.
Claim 5
Dependent Claim
17 words
A carton as defined in claim 3 wherein said one side is the outside of the carton.
Claim 6
Dependent Claim
32 words
A carton as defined in claim 4 further comprising a pair of top rear flaps foldably connected one to the side of each said top side panel remote from said free edge.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |