US3739436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the continuous treatment of pile fabrics
Assignee: MEIER WINDHORST A KG
•
Filing: 1971-04-22
•
Granted: 1973-06-19
•
Expires: 1991-04-22
Abstract
Abstract A process for the continuous treatment of webs of material having an upright nap consisting at least partially of thermoplastic fibers, and in particular for restoring the upright nap of velvet, velours, plush and the like, which comprises subjecting the web of material to a temperature above the softening point of the thermoplastic fibers and moving the webs substantially vertically with respect to the direction of travel of the web, and subsequently cooling it to a temperature below the softening point of the fibers before exposing the web to any mechanical or hydrodynamic pressure. Apparatus for carrying out the treatment is also described.
Inventors
- 👤 E Naujoks
- 👤 H Rommel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:12
CPC Classifications
D; D06; D06C; D06C29/00; D06C2700/00; D06C2700/29
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A process for the continuous treatment of webs of material having upright naps and composed at least partially of fibers having thermoplastic properties, wherein the nap of the web has been displaced during a wet-treatment at elevated temperatures, comprising: subjecting the web of material to a treatment bath having a temperature above the softening point of the thermoplastic fibers thereof; oscillating the web of material in the treatment bath so as to restore the nap to an upright position; raising the nap in the bath to a substantially vertical position by engaging the nap with a doctor blade; and cooling the web of material to a temperature below the softening point of the thermoplastic fibers before exposing the web to mechanical or hydrodynamic pressure by injecting cooling liquid into the treatment bath adjacent the web of material.
Claim 2
Dependent Claim
137 words
A process for the continuous treatment of webs of material having upright naps and composed at least partially of fibers having thermoplastic properties, wherein the nap of the web has been displaced during a wet-treatment at elevated temperatures, comprising: subjecting the web of material to a treatment bath having a temperature above the softening point of the thermoplastic fibers thereof; oscillating the web of material in the treatment bath so as to restore the nap to an upright position; raising the nap in the bath to a substantially vertical position by engaging the nap with a doctor blade; and cooling the web of material to a temperature below the softening point of the thermoplastic fibers before exposing the web to mechanical or hydrodynamic pressure by injecting cooling liquid into the treatment bath adjacent the web of material.
Claim 3
Independent Claim
173 words
An apparatus for the continuous treatment of webs of material having upright nap and composed at least partially of fibers having thermoplastic properties, wherein the nap of the web has been displaced during a wet-treatment at elevated temperatures, comprising: a container for receiving liquid having a temperature above the softening point of the thermoplastic fibers of the web of material; conveyor means for passing the web of material through said liquid in said container; a rotatable, polygonal-shaped roller, mounted on said container adjacent said web of material, for oscillating said liquid and the web of material disposed therein; a vertically disposed doctor blade, mounted on said container adjacent said roller, for engaging the nap of the web of material and restoring the nap to an upright position; and means, mounted on said container, for injecting cooling liquid into the treatment bath adjacent the web of material, for cooling the web to a temperature below the softening point of the thermoplastic fibers of the web, for fixing the nap in said restored upright position.
Claim 4
Independent Claim
173 words
An apparatus for the continuous treatment of webs of material having upright nap and composed at least partially of fibers having thermoplastic properties, wherein the nap of the web has been displaced during a wet-treatment at elevated temperatures, comprising: a container for receiving liquid having a temperature above the softening point of the thermoplastic fibers of the web of material; conveyor means for passing the web of material through said liquid in said container; a rotatable, polygonal-shaped roller, mounted on said container adjacent said web of material, for oscillating said liquid and the web of material disposed therein; a vertically disposed doctor blade, mounted on said container adjacent said roller, for engaging the nap of the web of material and restoring the nap to an upright position; and means, mounted on said container, for injecting cooling liquid into the treatment bath adjacent the web of material, for cooling the web to a temperature below the softening point of the thermoplastic fibers of the web, for fixing the nap in said restored upright position.
Claim 5
Dependent Claim
25 words
The apparatus as recited in claim 2, wherein said means for injecting cooling liquid into the treatment bath comprises a weir mounted on said container.
References Cited (Backward Citations)
US2699592A
Cited
US2970362A
Cited
US2904981A
Cited
GB1085058A
Cited
US3279022A
Cited
US3589147A
Cited
US3644954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |