US5084324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Micro-bubble laminate with perforated substrate
Assignee: Cryovac LLC
•
Filing: 1990-04-06
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Granted: 1992-01-28
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Expires: 2010-04-06
Abstract
Abstract A micro-bubble laminate is made by drawing a heated thermoplastic film through the perforations of a perforated substrate laminated to the film. The bubbles may then be trapped by laminating an additional thermoplastic layer to the laminate construction. This laminate may be used in producing air cushioning or bubble laminates, and the inventive process avoids the intricate and expensive machinery typically used in the production of air cushioning materials.
Inventors
- 👤 Henry G. Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/008; B29C51/12; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B32B38/00; B65; B65D; B65D81/00; B65D81/02; B65D81/03; B29L; B29L2031/00; B29L2031/712; B29L2031/7138; B32B38/04; B32B2038/047; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T428/24479; Y10T428/24562; Y10T428/24628; Y10T428/24661; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31938
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
68 words
A micro-bubble laminate comprising: a) a perforated substrate comprising a metallic or thermoplastic web; b) a first thermoplastic film adhered to the perforated substrate, and formed by drawing while heated through the perforations of the perforated substrate into gas bubbles protruding up through the perforations of the perforated substrate; and c) a second thermoplastic film adhered to the surface of the first thermoplastic film opposite the perforated substrate.
Claim 2
Dependent Claim
68 words
A micro-bubble laminate comprising: a) a perforated substrate comprising a metallic or thermoplastic web; b) a first thermoplastic film adhered to the perforated substrate, and formed by drawing while heated through the perforations of the perforated substrate into gas bubbles protruding up through the perforations of the perforated substrate; and c) a second thermoplastic film adhered to the surface of the first thermoplastic film opposite the perforated substrate.
Claim 3
Dependent Claim
14 words
The laminate according to claim 1 wherein the perforated substrate is a thermoplastic material.
Claim 4
Dependent Claim
16 words
The laminate according to claim 2 wherein the perforated substrate comprises a propylene polymer or copolymer.
Claim 5
Dependent Claim
14 words
The laminate according to claim 3 wherein the perforated substrate comprises biaxially oriented polypropylene.
Claim 6
Dependent Claim
14 words
The laminate according to claim 2 wherein the perforated substrate comprises a multilayer film.
Claim 7
Dependent Claim
24 words
The laminate according to claim 1 wherein the first thermoplastic film comprises a film having a sealant layer of an olefin polymer or copolymer.
Claim 8
Dependent Claim
23 words
The laminate according to claim 6 wherein the first thermoplastic film comprises a film having a sealant layer of ethylene vinyl acetate copolymer.
Claim 9
Dependent Claim
15 words
The laminate according to claim 1 wherein the first thermoplastic film comprises a multilayer film.
Claim 10
Dependent Claim
24 words
The laminate according to claim 1 wherein the second thermoplastic film comprises a film having a sealant layer of an olefin polymer or copolymer.
Claim 11
Dependent Claim
23 words
The laminate according to claim 9 wherein the second thermoplastic film comprises a film having a sealing layer of ethylene vinyl acetate copolymer.
Claim 12
Dependent Claim
23 words
The laminate according to claim 1 wherein at least one of the perforated substrate, first thermoplastic film, and second thermoplastic film is cross-linked.
Claim 13
Dependent Claim
13 words
The laminate according to claim 11 wherein the cross-linking is done by irradiation.
Claim 14
Dependent Claim
21 words
The laminate according to claim 8 wherein the first thermoplastic film includes a layer comprising a material of low oxygen permeability.
Claim 15
Dependent Claim
21 words
The laminate according to claim 1 wherein the second thermoplastic film includes a layer comprising a material of low oxygen permeability.
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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) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |