US5298310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Striped film and apparatus and method
Assignee: Cryovac LLC
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Filing: 1992-01-24
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Granted: 1994-03-29
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Expires: 2012-01-24
Abstract
Abstract Striped films of the invention can have two or more preferably polymeric layers, of which at least one continuous or discontinuous layer includes a pigmented resin. The striped film is produced by modifying conventional coextrusion dies to restrict the flow of a pigmented melt stream. The result is a striped film useful for identifying the contents of a package made from the film, tamper evidence, counterfeit protection and verification of properties. The stripes can be of one or more colors, and vary in width and spacing. The pigment can be a material visible in ordinary light, or a material invisible in ordinary light but visible in e.g. ultraviolet light.
Inventors
- 👤 Marvin R. Havens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:20
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/12; B29C48/16; B29C48/17; B29C48/18; B29C48/19; B29C48/20; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/302; B32B27/304; B32B27/306; B32B27/32; B32B27/34; B32B27/36; B32B27/365; B32B3/00; B32B3/10; B32B3/18; B32B3/22; B32B7/00; B32B7/04; B32B7/12; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B32B2250/00; B32B2250/24; B32B2307/00; B32B2307/40; B32B2307/402; B32B2307/4026; B32B2323/00; B32B2323/04; B32B2325/00; B32B2327/00; B32B2327/06; B32B2329/00; B32B2329/04; B32B2367/00; B32B2369/00; B32B2377/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/914; Y10S428/915; Y10S428/916; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/1307; Y10T428/1334; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24893; Y10T428/24901; Y10T428/249921
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
A film comprising at least three layers, of which at least one interior layer comprises a pigmented resin distributed so that the resulting film has a striped appearance; each of the layers comprising a polymeric resin.
Claim 2
Dependent Claim
36 words
A film comprising at least three layers, of which at least one interior layer comprises a pigmented resin distributed so that the resulting film has a striped appearance; each of the layers comprising a polymeric resin.
Claim 3
Dependent Claim
14 words
The film according to claim 1 wherein the pigment is detectable in ordinary light.
Claim 4
Dependent Claim
14 words
The film according to claim 1 wherein the pigment is detectable in ultraviolet light.
Claim 5
Dependent Claim
11 words
The film according to claim 1 comprising at least four layers.
Claim 6
Dependent Claim
11 words
The film according to claim 1 wherein the film is oriented.
Claim 7
Dependent Claim
12 words
The film according to claim 1 wherein the film is heat shrinkable.
References Cited (Backward Citations)
US2808617A
Cited
US3565737A
Cited
US4327136A
Cited
US4552789A
Cited
US4737391A
Cited
US4837956A
Cited
US4923551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |