US3708109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy open carton with reclosure feature
Assignee: F.N. Burt Co Inc
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Filing: 1971-10-06
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Granted: 1973-01-02
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Expires: 1991-10-06
Abstract
Abstract The upper closure and reclosure structure of the carton comprises a closure panel comprising the upper portion of the back panel of the carton hinged to the remaining fixed portion of that panel and secured along its side edges to the side panels of the carton by means of a break-away tear line. Hinged to the upper edge of the closure panel is a closure flap in the form of a truncated tongue. The opposite or front panel has a hinged top flap and the side panels have hinged dust flaps. Upon initial closure of the carton, the tongue is at the bottom, then the side flaps, and then the outer or top flap. The side flaps are glued to the underside of the top flap along a portion nearer the hinge of the top flap, and the portions of the side flaps nearer the closure panel are partially slit in a direction parallel to the hinge of the closure panel and creased in the direction at right angles to the slits to provide bendable ears or tabs between which the tongue of the closure panel may be frictionally held upon reclosure of the carton. The front panel flap extends only part way toward the rear, and the sidewall flaps are bevelled off adjacent the rear center of the top of the carton to expose the closure panel flap for finger pressure to open it.
Inventors
- 👤 C Rosenburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:04
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/70; B65D5/705
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
A carton of parallelopiped configuration having front, back and sidewall panels, and flaps extending from the upper and lower ends of said panels to form top and bottom closure structures; the upper portion of said back panel connected with the lower fixed portion of the back panel by a creased transverse hinge line to provide a swinging closure panel and a top closure flap hinged to the upper edge of said hinged closure panel; the top closure flap of the front wall panel extending toward the rear at the top of the carton and the top closure flaps of the sidewall panels extending inwardly toward each other and beneath said front wall flap, and each sidewall flap having a portion of its upper surface area glued to the underside of said frOnt panel flap; other portions of said sidewall flaps being free of adhesive and adapted to frictionally inter-engage the top flap of the closure panel upon reclosure.
Claim 2
Dependent Claim
158 words
A carton of parallelopiped configuration having front, back and sidewall panels, and flaps extending from the upper and lower ends of said panels to form top and bottom closure structures; the upper portion of said back panel connected with the lower fixed portion of the back panel by a creased transverse hinge line to provide a swinging closure panel and a top closure flap hinged to the upper edge of said hinged closure panel; the top closure flap of the front wall panel extending toward the rear at the top of the carton and the top closure flaps of the sidewall panels extending inwardly toward each other and beneath said front wall flap, and each sidewall flap having a portion of its upper surface area glued to the underside of said frOnt panel flap; other portions of said sidewall flaps being free of adhesive and adapted to frictionally inter-engage the top flap of the closure panel upon reclosure.
Claim 3
Dependent Claim
44 words
The carton, as set forth in claim 1, in which the side edges of the upper closure portion of the back panel are connected with the adjoining edges of the sidewall panels by tear lines for easy frangibility upon initial opening of the carton.
Claim 4
Dependent Claim
79 words
The carton, as set forth in claim 1, in which the top closure flaps of the sidewall panels are slit along lines transversely of the carton, to define the boundary separating the glued and the uncoated portions; the uncoated portions thus appearing as bendable ears, the top flap of the closure panel adapted to be inserted beneath the portion glued to the front wall flap and above the uncoated ear portion and frictionally held in such position upon reclosure.
Claim 5
Dependent Claim
55 words
The carton, as set forth in claim 3, in which the slits in the side flaps do not extend all the way to the sidewalls, and the flap of the closure panel is substantially in the form of a truncated triangle, whereby to frictionally engage the side flaps approximately to the depth of said slits.
Claim 6
Dependent Claim
76 words
The carton, as set forth in claim 1, in which the top closure flap of the front wall panel extends only part way across the top of the carton and the sidewall flaps are bevelled off near the rear center of the top of the carton to provide sufficient exposure of the shank portion of the top flap of the closure panel for the application of finger pressure to move the closure panel to open position.
Claim 7
Dependent Claim
252 words
A carton of parallelopiped configuration having front, back and sidewall panels, and flaps extending from the upper and lower ends of said panels to form top and bottom closure structures; the upper portion of said back panel connected with the lower fixed portion of the back panel by a creased transverse hinge line to provide a swinging closure panel, and a top closure flap hinged to the upper edge of said hinged closure panel; the top closure flap of the front wall panel extending toward the rear at the top of the carton and the top closure flaps of the sidewall panels extending inwardly toward each other and beneath said front wall flap, and each sidewall flap having a portion of its upper surface area glued to the underside of said front panel flap; and the closure panel flap extending beneath at least a portion of each of said sidewall flaps; the side edges of the upper closure portion of the back panel connected with the adjoining edges of the sidewall panels by tear lines for easy frangibility upon initial opening of the carton; the front wall flap extending only part way rearwardly at the top of the carton, and the sidewall flaps being bevelled off near the rear center of the top of the carton to provide sufficient exposure of the shank portion of the top flap of the closure panel for the application of finger pressure to move the closure panel to open position and break the marginal tear lines.
Claim 8
Dependent Claim
252 words
A carton of parallelopiped configuration having front, back and sidewall panels, and flaps extending from the upper and lower ends of said panels to form top and bottom closure structures; the upper portion of said back panel connected with the lower fixed portion of the back panel by a creased transverse hinge line to provide a swinging closure panel, and a top closure flap hinged to the upper edge of said hinged closure panel; the top closure flap of the front wall panel extending toward the rear at the top of the carton and the top closure flaps of the sidewall panels extending inwardly toward each other and beneath said front wall flap, and each sidewall flap having a portion of its upper surface area glued to the underside of said front panel flap; and the closure panel flap extending beneath at least a portion of each of said sidewall flaps; the side edges of the upper closure portion of the back panel connected with the adjoining edges of the sidewall panels by tear lines for easy frangibility upon initial opening of the carton; the front wall flap extending only part way rearwardly at the top of the carton, and the sidewall flaps being bevelled off near the rear center of the top of the carton to provide sufficient exposure of the shank portion of the top flap of the closure panel for the application of finger pressure to move the closure panel to open position and break the marginal tear lines.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |