Patent US4877178A successfully refreshed from Google Patents.
US4877178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paperboard foldable carton
Assignee: Dopaco Inc
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Filing: 1989-05-04
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Granted: 1989-10-31
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Expires: 2009-05-04
Abstract
Abstract A carton having a tray and cover locked in closed position by means of a pair of detents extending forwardly and above the front wall of the tray. The detents are of double thickness being formed by overlapped extensions of the glue flaps and side walls of the tray. A pair of slots in the cover receives the detents in a closed position to lock the cover to the tray.
Inventors
- 👤 Larry Eisman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:50
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/64; B65D5/66; B65D5/6626; B65D5/665; B65D5/667; B65D5/68
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A carton formed from a unitary blank of cut and foldable paperboard comprising: a tray, a cover fitting over said tray, and a fold line hinge connecting said tray and cover, said tray comprising: a bottom panel, two side walls, a rear wall and a front wall, said front wall having two glue flaps, each glue flap being adhered to one of said side walls, each glue flap having a detent in an upper portion thereof extending forwardly and above said front wall, each side wall having a detent in an upper portion thereof extending forwardly and above said front wall, each glue flap detent and each side wall detent being in overlapped joined relation to form a pair of double thickness detents, said cover comprising: a top panel, two side walls, a rear wall and a front wall, said front wall having a slot at each end portion thereof, said slots receiving said pair of detents when said cover is closed to lock said cover to said tray.
Claim 2
Dependent Claim
169 words
A carton formed from a unitary blank of cut and foldable paperboard comprising: a tray, a cover fitting over said tray, and a fold line hinge connecting said tray and cover, said tray comprising: a bottom panel, two side walls, a rear wall and a front wall, said front wall having two glue flaps, each glue flap being adhered to one of said side walls, each glue flap having a detent in an upper portion thereof extending forwardly and above said front wall, each side wall having a detent in an upper portion thereof extending forwardly and above said front wall, each glue flap detent and each side wall detent being in overlapped joined relation to form a pair of double thickness detents, said cover comprising: a top panel, two side walls, a rear wall and a front wall, said front wall having a slot at each end portion thereof, said slots receiving said pair of detents when said cover is closed to lock said cover to said tray.
Claim 3
Dependent Claim
88 words
A carton according to claim 1 wherein said cover rear wall is joined to said tray rear wall by said fold line hinge, said tray rear wall having two glue flaps, each tray rear wall glue flap being adhered to one of said tray side walls, each tray rear wall glue flap having an upper portion extending above said tray side walls, said upper portions abutting the cover rear wall when the cover is in closed position to prevent forward movement of said cover to release said detents.
Claim 4
Dependent Claim
14 words
A carton according to claim 2 wherein said upper portion is trapezoidal in shape.
Claim 5
Dependent Claim
192 words
A carton formed of a separable tray and cover, said tray comprising: a bottom panel, a first pair of opposed similar tray side walls, a second pair of opposed similar tray side walls, said first pair of side walls being of greater depth than said second pair, said second pair of side walls having a glue flap at each end portion thereof adhered to an adjacent end portion of said first side walls, each glue flap having a detent in an upper portion thereof extending outwardly and above said second side walls, each said first side wall having a detent extending outwardly and above said second side walls, said glue flap detents and said first side wall detents being in overlapped joined relation to form two pairs of double thickness detents, said cover comprising: a top panel, a first pair of opposed similar cover side walls, a second pair of opposed similar cover side walls, said first pair of cover side walls having slots at each end portion thereof, said slots receiving said two pairs of detents when said cover is placed on said tray to lock said cover to said tray.
Claim 6
Dependent Claim
192 words
A carton formed of a separable tray and cover, said tray comprising: a bottom panel, a first pair of opposed similar tray side walls, a second pair of opposed similar tray side walls, said first pair of side walls being of greater depth than said second pair, said second pair of side walls having a glue flap at each end portion thereof adhered to an adjacent end portion of said first side walls, each glue flap having a detent in an upper portion thereof extending outwardly and above said second side walls, each said first side wall having a detent extending outwardly and above said second side walls, said glue flap detents and said first side wall detents being in overlapped joined relation to form two pairs of double thickness detents, said cover comprising: a top panel, a first pair of opposed similar cover side walls, a second pair of opposed similar cover side walls, said first pair of cover side walls having slots at each end portion thereof, said slots receiving said two pairs of detents when said cover is placed on said tray to lock said cover to said tray.
Claim 7
Dependent Claim
60 words
A carton according to claim 4 wherein a glue flap is provided at each end portion of said first pair of cover side walls, an opening being provided in each glue flap, a relieved portion being provided at each end of said second pair of cover side walls, said openings and relieved portions overlapping each other to form said slots.
Claim 8
Dependent Claim
13 words
A carton according to claim 5 wherein said opening is trapezoidal in shape.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |