Patent US3680764A successfully refreshed from Google Patents.
US3680764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opening arrangement for drumhead cartons
Assignee: Riegel Paper Corp
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Filing: 1970-06-11
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Granted: 1972-08-01
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Expires: 1990-06-11
Abstract
Abstract An improved opening arrangement for dispensing the contents of a hermetically sealed drumhead carton is disclosed herein. A removable opening panel is included in the upper portion of a side wall, and its removal is facilitated by an integral lift tab formed in a contiguous dust flap. The lift tab is arranged and pre-cut so that it may be readily grasped and removed along with the opening panel to provide a dispensing opening in the carton while leaving the drumhead completely intact. Where reclosing of the carton is necessary or desired, the opening panel may be appropriately hinged in the carton side wall, and the carton may be reclosed by tucking the lift tab adjacent the drumhead.
Inventors
- 👤 Chauncey Young
- 👤 William H Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:09
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/42; B65D5/70; B65D5/701; B65D5/703
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
232 words
An end sealed carton fabricated from sheet material including a paperboard layer, comprising a. a carton body having consecutively articulated first side, front wall, second side, and rear wall panels; b. first and second dust flaps articulated to the end of each of said side wall panels along first and second hingE lines; c. end flaps articulated to the ends of each of said front and rear wall panels along hinge lines; d. a sealing membrane having parallel side edges; e. means strongly bonding said membrane to the inner surfaces of all of said flaps to close off the ends of said carton; f. an opening panel of less than full carton width defined within one of said side wall panels by a U-shaped line of weakness and an intermediate portion of said first hinge line; g. a pre-cut lift tab contiguous with said opening panel and defined within one of said dust flaps; h. said lift tab being hinged to said opening panel at an edge of said carton, defined by a score line; i. said membrane being bonded to said lift tab in a narrow longitudinal zone extending adjacent to said score line; and j. the portions of said lift tab remote from said score line being unbonded to said membrane; k. whereby lifting of said tab effects the separation of said tab and said membrane at said narrow zone.
Claim 2
Dependent Claim
232 words
An end sealed carton fabricated from sheet material including a paperboard layer, comprising a. a carton body having consecutively articulated first side, front wall, second side, and rear wall panels; b. first and second dust flaps articulated to the end of each of said side wall panels along first and second hingE lines; c. end flaps articulated to the ends of each of said front and rear wall panels along hinge lines; d. a sealing membrane having parallel side edges; e. means strongly bonding said membrane to the inner surfaces of all of said flaps to close off the ends of said carton; f. an opening panel of less than full carton width defined within one of said side wall panels by a U-shaped line of weakness and an intermediate portion of said first hinge line; g. a pre-cut lift tab contiguous with said opening panel and defined within one of said dust flaps; h. said lift tab being hinged to said opening panel at an edge of said carton, defined by a score line; i. said membrane being bonded to said lift tab in a narrow longitudinal zone extending adjacent to said score line; and j. the portions of said lift tab remote from said score line being unbonded to said membrane; k. whereby lifting of said tab effects the separation of said tab and said membrane at said narrow zone.
Claim 3
Dependent Claim
59 words
The carton of claim 1, further characterized in that a. said end flaps have relieved portions adjacent said one of said dust flap; b. said relieved portions are sufficient to provide access to said lift tab when said one of said dust flap is infolded and said end flaps are infolded over said infolded one of said dust flap.
Claim 4
Dependent Claim
25 words
The carton of claim 1, further characterized in that said membrane is sealed to said one of said dust flaps only along inboard portions thereof.
Claim 5
Dependent Claim
25 words
The carton of claim 2, in which a. said U-shaped line of weakness includes two tearable leg portions and a generally horizontal hinge line therebetween.
Claim 6
Dependent Claim
45 words
The carton of claim 4, in which a. said relieved portions define fingers in said end flaps; b. said fingers being adapted to retain said lift tab when the same has been reinserted, after opening, in said carton adjacent said membrane to reclose said carton.
References Cited (Backward Citations)
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |