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US3746243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seals for drumhead cartons
Assignee: Image Products Group LLC
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Filing: 1972-01-24
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Granted: 1973-07-17
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Expires: 1992-01-24
Abstract
Abstract This disclosure is directed to an improved method of construction of drumhead type cartons (i.e., parallelepiped cartons whose ends are sealed by independent, taut membranes). A portion of the glue flap in the manufacturer''s joint is extended beyond the end edges and is provided with a special edge configuration (e.g., sawtooth or non-straight edge) to provide a transverse dam or dams at the region of the manufacturer''s joint to which the membrane is tightly adhered. Absolute tightness at the joint maybe further enhanced by simultaneosuly cross-crushing and cross-sealing the membrane and underlying special edge portions by a specially configured sealing platen.
Inventors
- 👤 C Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:49
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/02; B65D5/0272
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
224 words
In a parallelepiped carton having consecutively articulated first side, front, second side, and rear walls with said rear wall adhered to said first side wall by a glue flap articulated to said rear wall; said carTon having first, front, second, and rear closing flaps articulated to each of said first side, front, second side and rear walls, respectively, and a glue flap segment having an outer edge lying along a generally straight line articulated to said glue flap; said glue flap segment being adhered to said first flap and defining therewith a composite flap having a discrete shoulder therein, and improved drumhead closure characterised in that characterized a. the side edge of said glud flap segment includes at least one interruption having a trough glue inwardly of said generally straight line; b. a heat sealable membrane tightly adhered about the periphery of the end of said carton at the edges thereof to said glue flap segment, the exposed portion of said first flap not underlying the glue flap segment, said front flap, said second flap, and said rear flap; c. said membrane being adhered by circumscribing heat seals; d. a portion of said membrane being crushed into the trough of said segment and intersecting said generally straight line; e. whereby the end of said parallelpiped carton is sealed in an airtight and siftproof fashion.
Claim 2
Dependent Claim
224 words
In a parallelepiped carton having consecutively articulated first side, front, second side, and rear walls with said rear wall adhered to said first side wall by a glue flap articulated to said rear wall; said carTon having first, front, second, and rear closing flaps articulated to each of said first side, front, second side and rear walls, respectively, and a glue flap segment having an outer edge lying along a generally straight line articulated to said glue flap; said glue flap segment being adhered to said first flap and defining therewith a composite flap having a discrete shoulder therein, and improved drumhead closure characterised in that characterized a. the side edge of said glud flap segment includes at least one interruption having a trough glue inwardly of said generally straight line; b. a heat sealable membrane tightly adhered about the periphery of the end of said carton at the edges thereof to said glue flap segment, the exposed portion of said first flap not underlying the glue flap segment, said front flap, said second flap, and said rear flap; c. said membrane being adhered by circumscribing heat seals; d. a portion of said membrane being crushed into the trough of said segment and intersecting said generally straight line; e. whereby the end of said parallelpiped carton is sealed in an airtight and siftproof fashion.
Claim 3
Dependent Claim
17 words
The carton of claim 1, in which said interruptions are in the form of sawtooth shaped projections.
Claim 4
Dependent Claim
156 words
In a parallelepiped carton having consecutively articulated first side, front, second side, and rear walls with said rear wall adhered to said first side wall by a glue flap articulated to said rear wall; said carton having first, front, second, and rear closing flaps articulated to each of said first side, front, second side and rear walls, respectively, and a glue flap segment; said glue flap being adhered to said first wall, an improved drumhead closure characterized in that a. said glue flap segment terminating at the upper and lower edges of said first wall; b. said glue flap end edges including a series of interruptions, whereby said glue flap end edges are crushable during subsequent membrane application; c. a membrane sealed to said first, second, front and rear flaps and to the interrupted end edges of said glue flap; d. whereby the end of said parallelpiped carton is sealed in an airtight and siftproof fashion.
Claim 5
Dependent Claim
156 words
In a parallelepiped carton having consecutively articulated first side, front, second side, and rear walls with said rear wall adhered to said first side wall by a glue flap articulated to said rear wall; said carton having first, front, second, and rear closing flaps articulated to each of said first side, front, second side and rear walls, respectively, and a glue flap segment; said glue flap being adhered to said first wall, an improved drumhead closure characterized in that a. said glue flap segment terminating at the upper and lower edges of said first wall; b. said glue flap end edges including a series of interruptions, whereby said glue flap end edges are crushable during subsequent membrane application; c. a membrane sealed to said first, second, front and rear flaps and to the interrupted end edges of said glue flap; d. whereby the end of said parallelpiped carton is sealed in an airtight and siftproof fashion.
Claim 6
Dependent Claim
17 words
The carton of claim 3, in which said interruptions are in the form of sawtooth shaped projections.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |