US4188445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated fabric of polypropylene
Assignee: Chromatex Inc
•
Filing: 1978-12-21
•
Granted: 1980-02-12
•
Expires: 1998-12-21
Abstract
Abstract A laminated fabric includes a layer of woven olefin yarns bonded to a layer of non-woven olefin material to form a unitary fabric structure.
Inventors
- 👤 Philip R. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:33
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B27/00; B32B27/12; B32B37/00; B32B37/12; B32B37/14; B32B37/16; B32B37/20; B32B37/203; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2305/00; B32B2305/10; B32B2305/18; B32B2305/20; B32B2323/00; B32B2323/10; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3707; Y10T442/378; Y10T442/3805
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A process for forming a laminated fabric comprising the steps of conveying a pre-formed layer of woven polypropylene yarns from a storage location to a spraying station, conveying a pre-formed layer of non-woven polypropylene material from a storage location to said spraying station, spraying one surface of said woven polypropylene yarn and one surface of the non-woven polypropylene material with a solvent-based adhesive, conveying said pre-formed layer of woven polypropylene yarn and said pre-formed layer of non-woven polypropylene material to a bonding station whereat said pre-formed layer of woven polypropylene yarn and said pre-formed layer of non-woven polypropylene material are bonded together under pressure at a temperature below 200° F. to produce a unitary fabric structure having greater strength and stability characteristics than the layer of woven polypropylene yarns without shrinkage or distortion of the characteristics of the polypropylene yarns.
Claim 2
Dependent Claim
140 words
A process for forming a laminated fabric comprising the steps of conveying a pre-formed layer of woven polypropylene yarns from a storage location to a spraying station, conveying a pre-formed layer of non-woven polypropylene material from a storage location to said spraying station, spraying one surface of said woven polypropylene yarn and one surface of the non-woven polypropylene material with a solvent-based adhesive, conveying said pre-formed layer of woven polypropylene yarn and said pre-formed layer of non-woven polypropylene material to a bonding station whereat said pre-formed layer of woven polypropylene yarn and said pre-formed layer of non-woven polypropylene material are bonded together under pressure at a temperature below 200° F. to produce a unitary fabric structure having greater strength and stability characteristics than the layer of woven polypropylene yarns without shrinkage or distortion of the characteristics of the polypropylene yarns.
Claim 3
Dependent Claim
59 words
The process of claim 1 wherein said bonding station includes first and second pairs of co-acting pressure rollers spaced from one another and said bonding step includes the step of passing said layer of woven polypropylene yarn and said layer of non-woven polypropylene material between each pair of pressure rollers at said bonding station to bond the layers together.
Claim 4
Dependent Claim
57 words
The process of claim 2 wherein said first pair of pressure rollers applies a first pressure to said layer of woven polypropylene yarns and said layer of non-woven polypropylene material and said second pair of pressure rollers applies a second and higher pressure to said layer of woven polypropylene yarns and said layer of non-woven polypropylene material.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein said solvent is a chlorinated hydrocarbon.
Claim 6
Dependent Claim
65 words
A laminated fabric formed by the process of bonding a pre-formed layer of woven polypropylene yarns to a pre-formed layer of non-woven polypropylene material using a solvent-based adhesive at a temperature less than 200° F. to produce a unitary fabric structure having greater strength and stability characteristics than the layer of woven polypropylene yarns without shrinkage or distortion of the characteristics of the polypropylene yarns.
Claim 7
Dependent Claim
65 words
A laminated fabric formed by the process of bonding a pre-formed layer of woven polypropylene yarns to a pre-formed layer of non-woven polypropylene material using a solvent-based adhesive at a temperature less than 200° F. to produce a unitary fabric structure having greater strength and stability characteristics than the layer of woven polypropylene yarns without shrinkage or distortion of the characteristics of the polypropylene yarns.
Claim 8
Dependent Claim
89 words
The laminated fabric formed by the process of claim 5 wherein the process further includes the steps of coating the bottom surface of the pre-formed layer of woven polypropylene yarns with a solvent based adhesive and conveying said layer of woven polypropylene yarns and said preformed layer of non-woven polypropylene material to a bonding station whereat said layers are bonded together under pressure applied by passing said layer of woven polypropylene yarns and said layer of non-woven polypropylene material successively between first and second co-acting pairs of pressure rollers.
Claim 9
Dependent Claim
62 words
The laminated fabric formed by the process of claim 6 wherein said first pair of pressure rollers applied a first pressure to said layer of woven polypropylene yarns and said layer of non-woven polypropylene material and said second pair of pressure rollers applies a second and higher pressure to said layer of woven polypropylene yarns and said layer of non-woven polypropylene material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |