Patent US2900095A successfully refreshed from Google Patents.
Patent JPS5269711A successfully refreshed from Google Patents.
US4428525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easy access sandwich carton
Assignee: International Paper Co
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Filing: 1982-08-09
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Granted: 1984-01-31
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Expires: 2002-08-09
Abstract
Abstract A carton having upper and lower hingedly connected halves with "V" shaped cross sections, adapted to be folded compactly and firmly closeable when erected and filled with contents are disclosed. The cartons are especially suitable for use in packaging fast food items particularly hot or cold sandwiches on rolls or buns.
Inventors
- 👤 Arne H. Brauner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:03
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/36; B65D5/42; B65D5/64; B65D5/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
375 words
A folding carton consisting of (A) a lower portion having a substantially "V" shaped cross section comprising a bottom wall, a rear wall hingedly attached thereto, and two lower side walls hingedly attached to said bottom and rear walls; each of said side walls comprising an inner lower flap hingedly attached to said bottom wall and an outer lower flap hingedly attached to said rear wall, said outer lower flap being divided into substantially equal glue and non-glue panels by a fold line extending upwardly from the intersection of said outer lower flap and said bottom and rear walls, said glue panel being the panel relatively more remote from the line of attachment of said outer lower flap to said rear wall and said outer lower flap being secured to said inner lower flap only at said glue panel; said inner lower flap bearing a tab adapted to be cooperatively engaged in a slit sited about at the fold line connecting said rear wall and said outer lower flap; and (B) an upper portion having a substantially "V" shaped cross section, comprising a top wall hingedly attached to the rear wall of said lower portion, a front wall hingedly attached to said top wall and two upper side wall portions hingedly attached to said front and top wall, each of said upper side wall portions comprising an inner upper flap hingedly attached to said front wall and an outer upper flap hingedly attached to said top wall, said outer upper flap being divided into substantially equal glue and non-glue panels by a fold line extending downwardly from the intersection of said outer upper flap and said top and front walls, said glue panel being the panel relatively more remote from the line of attachment of said outer upper flap to said top wall and said outer upper flap being secured to said inner upper flap only at said glue panel; said lower side walls extending partially inside said upper side walls in the erected and closed carton; said bottom wall having a flap hingedly extending therefrom on the front edge thereof, said flap having a "U" shaped slit therein adapted to form a reverse tab cooperatively engageable in a corresponding slot in said front wall.
Claim 2
Dependent Claim
375 words
A folding carton consisting of (A) a lower portion having a substantially "V" shaped cross section comprising a bottom wall, a rear wall hingedly attached thereto, and two lower side walls hingedly attached to said bottom and rear walls; each of said side walls comprising an inner lower flap hingedly attached to said bottom wall and an outer lower flap hingedly attached to said rear wall, said outer lower flap being divided into substantially equal glue and non-glue panels by a fold line extending upwardly from the intersection of said outer lower flap and said bottom and rear walls, said glue panel being the panel relatively more remote from the line of attachment of said outer lower flap to said rear wall and said outer lower flap being secured to said inner lower flap only at said glue panel; said inner lower flap bearing a tab adapted to be cooperatively engaged in a slit sited about at the fold line connecting said rear wall and said outer lower flap; and (B) an upper portion having a substantially "V" shaped cross section, comprising a top wall hingedly attached to the rear wall of said lower portion, a front wall hingedly attached to said top wall and two upper side wall portions hingedly attached to said front and top wall, each of said upper side wall portions comprising an inner upper flap hingedly attached to said front wall and an outer upper flap hingedly attached to said top wall, said outer upper flap being divided into substantially equal glue and non-glue panels by a fold line extending downwardly from the intersection of said outer upper flap and said top and front walls, said glue panel being the panel relatively more remote from the line of attachment of said outer upper flap to said top wall and said outer upper flap being secured to said inner upper flap only at said glue panel; said lower side walls extending partially inside said upper side walls in the erected and closed carton; said bottom wall having a flap hingedly extending therefrom on the front edge thereof, said flap having a "U" shaped slit therein adapted to form a reverse tab cooperatively engageable in a corresponding slot in said front wall.
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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) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |