Patent US3646744A successfully refreshed from Google Patents.
US3646744A
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Method and apparatus for bulking yarn
Assignee: United States Department of Agriculture
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Filing: 1969-12-22
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Granted: 1972-03-07
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Expires: 1989-12-22
Abstract
Abstract An apparatus utilizing ultrasonic components was designed and used in combination with select chemicals to produce permanent bulking in cotton and other yarns. The method constitutes immersing the yarns in cross-linking formulations and subjecting these while immersed to ultrasonic irradiation. An extension of the method comprises imparting resiliency to the bulked yarns. This is accomplished both by mechanical and by chemical means.
Inventors
- 👤 Ralph A Rusca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:53
CPC Classifications
D; D06; D06B; D06B13/00; D02; D02G; D02G1/00; D06M; D06M10/00; D06M10/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A method of imparting a stretchable bulked configuration to cellulosic and other textile yarns which comprises: a. immersing a textile yarn in a solution containing a crosslinking agent; b. subjecting the yarn, while so immersed, to acoustic energy irradiation to cause said yarn to acquire a bulked configuration; c. transporting the wet bulked yarn with a minimum of tension to a heating zone; d. applying a falsetwist to the yarn while being transported and before said yarn reaches the curing zone; and e. heating the falsetwisted yarn to cure the cross-linking agent thereby producing a cross-linked stretchable, bulked yarn.
Claim 2
Independent Claim
99 words
A method of imparting a stretchable bulked configuration to cellulosic and other textile yarns which comprises: a. immersing a textile yarn in a solution containing a crosslinking agent; b. subjecting the yarn, while so immersed, to acoustic energy irradiation to cause said yarn to acquire a bulked configuration; c. transporting the wet bulked yarn with a minimum of tension to a heating zone; d. applying a falsetwist to the yarn while being transported and before said yarn reaches the curing zone; and e. heating the falsetwisted yarn to cure the cross-linking agent thereby producing a cross-linked stretchable, bulked yarn.
Claim 3
Independent Claim
120 words
A method of imparting a stretchable bulked configuration to cellulosic and other textile yarns which comprises: a. immersing a textile yarn in a solution containing a cross-linking agent; b. subjecting the yarn, while so immersed, to acoustic energy irradiation to cause said yarn to acquire a bulked configuration; c. heating the wet bulked yarn, while under a minimum of tension, to cure the cross-linking agent, thereby cross-linking the yarn and setting the bulked configuration; d. passing said cross-linked yarn through a catalyst solution to partially break the cross-links while applying a falsetwist to the wet yarn; and e. then heating the wet, falsetwisted yarn to recure the cross-linking agent to set the falsetwist, thereby producing a cross-linked stretchable bulked yarn.
Claim 4
Independent Claim
120 words
A method of imparting a stretchable bulked configuration to cellulosic and other textile yarns which comprises: a. immersing a textile yarn in a solution containing a cross-linking agent; b. subjecting the yarn, while so immersed, to acoustic energy irradiation to cause said yarn to acquire a bulked configuration; c. heating the wet bulked yarn, while under a minimum of tension, to cure the cross-linking agent, thereby cross-linking the yarn and setting the bulked configuration; d. passing said cross-linked yarn through a catalyst solution to partially break the cross-links while applying a falsetwist to the wet yarn; and e. then heating the wet, falsetwisted yarn to recure the cross-linking agent to set the falsetwist, thereby producing a cross-linked stretchable bulked yarn.
Claim 5
Dependent Claim
215 words
Apparatus for imparting a stretchable, bulked configuration to cellulosic and other textile yarns comprising: a. a source of supply of said yarn; b. a tank for containing a solution of chemical cross-linking agent to react with the yarn, said tank having a yarn inlet point and a yarn exit point; c. transducer means mounted within said tank; d. means for generating an electrical signal having at least a sonic frequency connected to said transducer; e. heating means disposed outside and beyond the yarn exit point of the tank; f. transporting means for passing yarn from the source of supply in proximity to the transducer and then through the heating means, said transporting means including first guide means for guiding yarn from said source of supply to the entrance point of the tank, second guide means to maintain yarn immersed in the tank in proximity to the transducer, first driven means for withdrawing yarn through the exit point of the tank while applying a minimum of tension to the yearn, and second driven means beyond the heating means for drawing yarn from the first driven means through said heating means; and g. means disposed betweeN said first and second driven means for applying a falsetwist to the yarn prior to its passage into the heating means.
Claim 6
Dependent Claim
215 words
Apparatus for imparting a stretchable, bulked configuration to cellulosic and other textile yarns comprising: a. a source of supply of said yarn; b. a tank for containing a solution of chemical cross-linking agent to react with the yarn, said tank having a yarn inlet point and a yarn exit point; c. transducer means mounted within said tank; d. means for generating an electrical signal having at least a sonic frequency connected to said transducer; e. heating means disposed outside and beyond the yarn exit point of the tank; f. transporting means for passing yarn from the source of supply in proximity to the transducer and then through the heating means, said transporting means including first guide means for guiding yarn from said source of supply to the entrance point of the tank, second guide means to maintain yarn immersed in the tank in proximity to the transducer, first driven means for withdrawing yarn through the exit point of the tank while applying a minimum of tension to the yearn, and second driven means beyond the heating means for drawing yarn from the first driven means through said heating means; and g. means disposed betweeN said first and second driven means for applying a falsetwist to the yarn prior to its passage into the heating means.
Claim 7
Dependent Claim
249 words
Apparatus for imparting a stretchable, bulked configuration to cellulosic and other textile yarns comprising: a. a source of supply of said yarn; b. a first tank for containing a solution of a chemical cross-linking agent to react with the yarn; c. transducer means mounted within said first tank; d. means for generating an electrical signal having at least a sonic frequency connected to said transducer; e. a second tank for containing a cross-link breaking catalyst solution; f. first heating means located between said first and second tanks; g. driven windup means for winding up finished, treated yarn; h. yarn transporting means for passing yarn, serially, from the source of supply through the first tank, the first heating means, through the second tank, and finally to said windup means, said transporting means including means for guiding yarn into and out of said first tank while passing said yarn in proximity to the transducer, means for guiding said yarn from the first tank through the first heating means to the second tank, and means for guiding said yarn from said second tank to the yarn windup means; i. means for driving said windup means while applying a minimum of tension to the yarn; j. second heating means disposed between the second tank and windup means for heating yarn withdrawn from said second tank; and k. means disposed between the windup means and the second tank for applying a falsetwist to the yarn prior to its passage through the second heating means.
Claim 8
Dependent Claim
249 words
Apparatus for imparting a stretchable, bulked configuration to cellulosic and other textile yarns comprising: a. a source of supply of said yarn; b. a first tank for containing a solution of a chemical cross-linking agent to react with the yarn; c. transducer means mounted within said first tank; d. means for generating an electrical signal having at least a sonic frequency connected to said transducer; e. a second tank for containing a cross-link breaking catalyst solution; f. first heating means located between said first and second tanks; g. driven windup means for winding up finished, treated yarn; h. yarn transporting means for passing yarn, serially, from the source of supply through the first tank, the first heating means, through the second tank, and finally to said windup means, said transporting means including means for guiding yarn into and out of said first tank while passing said yarn in proximity to the transducer, means for guiding said yarn from the first tank through the first heating means to the second tank, and means for guiding said yarn from said second tank to the yarn windup means; i. means for driving said windup means while applying a minimum of tension to the yarn; j. second heating means disposed between the second tank and windup means for heating yarn withdrawn from said second tank; and k. means disposed between the windup means and the second tank for applying a falsetwist to the yarn prior to its passage through the second heating means.
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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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |