US4235341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirally wound container with strippable layer
Assignee: Dow Chemical Co
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Filing: 1978-09-19
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Granted: 1980-11-25
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Expires: 1998-09-19
Abstract
Abstract A spirally wound container for leavened dough and other products which is opened by side rupture. The container comprises a fiber board body having multiple thermoplastic film plies. An inner transparent ply of film adheres to the surface of the fiber board spirally wound can body and is rupturable therewith. An outer ply of film forms a label cover for the container and is strippable prior to opening of the container. After the label ply is stripped from the container, the transparent inner ply permits reading of graphics printed on the fiber body of the can. The inner film ply strengthens the body ply and acts as a moisture barrier.
Inventors
- 👤 Leandra P. Martin
- 👤 Robert A. Luecke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:53
CPC Classifications
B; B65; B65D; B65D3/00; B65D3/22; Y; Y10; Y10S; Y10S206/00; Y10S206/83
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A multi-ply spirally wound container openable by rupture of ply seams comprising a base fibrous ply, an inner thermoplastic film ply adhered to and surrounding the base ply, said inner film ply being transparent film, the exterior of the base ply containing graphics readable through the inner film ply, an outer film ply surrounding the inner film ply, said outer film ply being peelable from the inner film ply, the inner film ply being of such a strength and gauge that it can rupture together with the base ply when the container is twisted or hit upon a hard object, said container being closed at both ends thereof to contain product therein.
Claim 2
Dependent Claim
112 words
A multi-ply spirally wound container openable by rupture of ply seams comprising a base fibrous ply, an inner thermoplastic film ply adhered to and surrounding the base ply, said inner film ply being transparent film, the exterior of the base ply containing graphics readable through the inner film ply, an outer film ply surrounding the inner film ply, said outer film ply being peelable from the inner film ply, the inner film ply being of such a strength and gauge that it can rupture together with the base ply when the container is twisted or hit upon a hard object, said container being closed at both ends thereof to contain product therein.
Claim 3
Dependent Claim
31 words
The structure of claim 1 wherein the inner film ply has a thickness of about 0.2 mil to about 0.4 mil and the base fibrous ply is thin and smooth surfaced.
Claim 4
Dependent Claim
41 words
The structure of claim 1 wherein the inner film ply comprises a coextruded thermoplastic film material wherein one layer is a corona discharge-treated low density of polyethylene film and another layer of which is a layer of general purpose polystyrene film.
Claim 5
Dependent Claim
20 words
The container of claim 1 wherein a metal foil liner is adhered to the inner surface of the base ply.
Claim 6
Dependent Claim
21 words
The structure of claim 1 wherein the inner film ply comprises a multilayered structure of polyethylene film and impact polystyrene film.
Claim 7
Dependent Claim
34 words
The structure of claim 1 wherein the inner film ply comprises a corona discharge-treated low density polyethylene film and the outer film ply comprises a blend, the major component of which is impact polystyrene.
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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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |