US3880201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for severing textile fabric
Assignee: Parks Cramer Co
•
Filing: 1973-08-21
•
Granted: 1975-04-29
•
Expires: 1993-08-21
Abstract
Abstract Textile fabric is severed by the impingement thereagainst of a heated fluid stream, preferably compressed air heated to a temperature at least sufficient to soften thermoplastic yarns forming a portion of the fabric and impinged against the yarns at a velocity at least sufficient to separate the softened yarns, and the fabric being maintained in a tensioned condition and supported adjacent the location of impingement.
Inventors
- 👤 Jr Charles D Lee
- 👤 Iii James H Henderlite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:32
CPC Classifications
D; D06; D06H; D06H7/00; D06H7/22; D03; D03D; D03D49/00; D03D49/70; D03J; D03J1/00; D03J1/06; D03J1/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A method of severing a length of textile fabric comprising the steps of moving fabric along a predetermined path of travel while imposing on the fabric forces tensioning the fabric in the plane of the path and while contacting one face of the fabric to restrain the fabric against movement in one direction transversely away from the plane of the path, delivering a flowing stream of gas while heating the gas stream to an elevated temperature and while directing the heated gas stream in the one direction for impingement against the moving and tensioned fabric at a location generally opposite the restraining contact therewith, and severing the fabric with the heated gas stream.
Claim 2
Independent Claim
113 words
A method of severing a length of textile fabric comprising the steps of moving fabric along a predetermined path of travel while imposing on the fabric forces tensioning the fabric in the plane of the path and while contacting one face of the fabric to restrain the fabric against movement in one direction transversely away from the plane of the path, delivering a flowing stream of gas while heating the gas stream to an elevated temperature and while directing the heated gas stream in the one direction for impingement against the moving and tensioned fabric at a location generally opposite the restraining contact therewith, and severing the fabric with the heated gas stream.
Claim 3
Dependent Claim
154 words
The combination, with a textile apparatus for handling textiLe fabric, of means for severing textile fabric and comprising means for moving the fabric along a predetermined path of travel, means for imposing on the fabric forces tensioning the fabric in the plane of the path, means contacting one face of the fabric for restraining the fabric against movement in one direction transversely away from the plane of the path, means for delivering a flowing stream of pressurized gas, and means for heating the gas stream to an elevated temperature and for directing the heated gas stream transversely of the plane of the path in the one direction and for impinging the heated gas stream against the other face of the fabric at a location generally opposite the location at which said restraining means contacts the one face of the fabric for severing the fabric at a location spaced inwardly from any side edge thereof.
Claim 4
Dependent Claim
154 words
The combination, with a textile apparatus for handling textiLe fabric, of means for severing textile fabric and comprising means for moving the fabric along a predetermined path of travel, means for imposing on the fabric forces tensioning the fabric in the plane of the path, means contacting one face of the fabric for restraining the fabric against movement in one direction transversely away from the plane of the path, means for delivering a flowing stream of pressurized gas, and means for heating the gas stream to an elevated temperature and for directing the heated gas stream transversely of the plane of the path in the one direction and for impinging the heated gas stream against the other face of the fabric at a location generally opposite the location at which said restraining means contacts the one face of the fabric for severing the fabric at a location spaced inwardly from any side edge thereof.
Claim 5
Dependent Claim
198 words
In combination with a textile loom for manipulating textile yarns to form at a fabric forming location a woven textile fabric which includes at least some thermally degradable yarns, the fabric having at at least one edge successive separated weft yarn ends protruding therefrom and said loom having means for moving the fabric along a predetermined path of travel from the fabric forming location and means for imposing on the fabric forces tensioning the fabric in the plane of the path of travel; means for severing the fabric along a warpwise longitudinal line spaced inwardly of but adjacent to said one edge, said severing means comprising thermally insulating housing means mounted on said loom, means for supplying a flowing stream of noncombustible gas, means mounted within said housing means for receiving the gas stream and for heating the same to an elevated temperature of at least about 500*F., and means for directing the heated gas stream transversely of said plane of the path and for impinging the heated gas stream against a face of the tensioned fabric at a velocity of at least about 6,000 feet per minute to sever the fabric while producing a smoothly cut edge.
Claim 6
Dependent Claim
198 words
In combination with a textile loom for manipulating textile yarns to form at a fabric forming location a woven textile fabric which includes at least some thermally degradable yarns, the fabric having at at least one edge successive separated weft yarn ends protruding therefrom and said loom having means for moving the fabric along a predetermined path of travel from the fabric forming location and means for imposing on the fabric forces tensioning the fabric in the plane of the path of travel; means for severing the fabric along a warpwise longitudinal line spaced inwardly of but adjacent to said one edge, said severing means comprising thermally insulating housing means mounted on said loom, means for supplying a flowing stream of noncombustible gas, means mounted within said housing means for receiving the gas stream and for heating the same to an elevated temperature of at least about 500*F., and means for directing the heated gas stream transversely of said plane of the path and for impinging the heated gas stream against a face of the tensioned fabric at a velocity of at least about 6,000 feet per minute to sever the fabric while producing a smoothly cut edge.
Claim 7
Dependent Claim
14 words
The combination according to claim 3 wherein said stream supplying means supplies compressed air.
References Cited (Backward Citations)
US3036358A
Cited
US3144882A
Cited
US3135298A
Cited
US3174515A
Cited
US3414955A
Cited
US3461920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |