US3795031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the continuous shrinkage of random webs
Assignee: Vepa AG
•
Filing: 1970-11-13
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Granted: 1974-03-05
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Expires: 1990-11-13
Abstract
Abstract A process for the shrinkage of random webs which includes the steps of drawing-in a web of textile material to be treated, freely guiding the web of textile material over a distance which is at least equal to the width of the untreated web of textile material and which is substantially vertical, pleating the width of the web of textile material to form a wave-like fleece, conveying the pleated wave-like fleece over the conveying surface of at least one sieve means and passing a heated fluid processing medium through the conveying surface and through said fleece and thereafter removing the treated fleece from the conveying surface of said sieve means. Drawing-in the web is effected to provide overfeeding in the length of the web onto the seive means.
Inventors
- 👤 H Fleissner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/04; D04H1/06; Y; Y10; Y10S; Y10S68/00; Y10S68/903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
160 words
A process for the production of webs of textile material by shrinking a continuous random web of textile material on a sieve means through which a heated fluid processing medium is passed, which comprises drawing-in the web of textile material to be treated, freely guiding the web of textile material over a distance which is at least equal to the width of the untreated web of textile material and which is substantially vertical, pleating the width of the web of textile material to form a wavelike random web, conveying the pleated wave-like random web to the conveying surface of at least one sieve means, passing a heated fluid processing medium through said conveying surface and through said random web, said web being drawn in at a rate sufficient to provide overfeeding in the length of the random web to the conveying surface of said sieve means, and thereafter removing the random web from the conveying surface of said sieve means.
Claim 2
Dependent Claim
160 words
A process for the production of webs of textile material by shrinking a continuous random web of textile material on a sieve means through which a heated fluid processing medium is passed, which comprises drawing-in the web of textile material to be treated, freely guiding the web of textile material over a distance which is at least equal to the width of the untreated web of textile material and which is substantially vertical, pleating the width of the web of textile material to form a wavelike random web, conveying the pleated wave-like random web to the conveying surface of at least one sieve means, passing a heated fluid processing medium through said conveying surface and through said random web, said web being drawn in at a rate sufficient to provide overfeeding in the length of the random web to the conveying surface of said sieve means, and thereafter removing the random web from the conveying surface of said sieve means.
Claim 3
Dependent Claim
24 words
The process of claim 1, wherein the processing medium is a fluid selected from the group consisting of a treatment liquor and a gas.
Claim 4
Dependent Claim
41 words
The process of claim 1, wherein the sieve means is in a treatment chamber containing said processing medium and the continuous random web is fed through the processing medium at least until the web is heated up to the shrinking temperature.
Claim 5
Dependent Claim
46 words
The process of claim 1, wherein the random web is formed wave-like from the middle of the untreated web towards the outer edges thereof, as viewed in the direction of travel of the web before entering the processing medium for the shrinking stage of the process.
Claim 6
Dependent Claim
50 words
The process of claim 1, wherein the web of textile material to be treated is drawn in by roller means, and then freely guided to pleating means for providing overfeeding in the width of the web of textile material, said roller means being disposed substantially vertically above said pleating means.
Claim 7
Dependent Claim
31 words
The process of claim 1, wherein the sieve means includes at least one sieve drum means subjected to a suction draft and said processing medium is drawn through said random web.
Claim 8
Dependent Claim
31 words
The process of claim 1, wherein said web is composed of at least two fiber types, one of said fiber types shrinking more under the influence of heat than the other.
Claim 9
Dependent Claim
39 words
The process of claim 1, wherein said sieve means is immersed in a treatment chamber containing a liquid processing medium and the random web is passed through the liquid processing medium to the conveying surface of said sieve means.
References Cited (Backward Citations)
US2197147A
Cited
US2910763A
Cited
GB1004909A
Cited
FR1323405A
Cited
FR1480200A
Cited
NL6602895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |