US3886015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite thread and process for making the same
Assignee: Individual
•
Filing: 1973-08-23
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Granted: 1975-05-27
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Expires: 1993-08-23
Abstract
Abstract A composite thread having a core composed of one or more filaments circumscribing which is a sheath of the same or different material. The composite thread has physical properties different from the physical properties of the individual components of which it is formed. The sheath is formed of a heat formable polymeric film which is stretched or elongated with respect to the core during manufacture of the composite thread. A process for manufacturing a composite thread wherein the sheath circumscribes the filament or filaments that constitute the core and wherein the materials are drawn through a die so as to establish the cross-sectional shape of the composite thread. As the elements are drawn through the die greater tension is applied to the sheath material so that it is elongated relative to the core filaments thereby to afford the desired physical properties.
Inventors
- 👤 Robert F Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/36; D04; D04H; D04H3/00; D04H3/08; D04H3/12; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/101
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A PROCESS FOR MANUFACTUREIN AN ELONGATE THEREAD HAVING PHYSICAL PROPERTIES DIFFERENT FROM AND SUBSTANTIALLY SUPERIOR TO THE PHYSICAL PROPERTIES OF THE INDIVIDUAL COMPONENTS COMPRISING THE STEPS OF PROVIDING A CORE HAVING AT LEAST ONE FLAMENT, PROVIDING A TAPE OF POLYMERIC FILM HAVING A WIDTH GREATHER THAN THE CIRCUMFERENCE OF THE FLAMEMENT AND A LENGTH LESS THAN THE LENGTH OF THE FILAMENT, HEATING THE TAPE, APPLYING TENSION TO THE TAPE TO STRETCH THE TAPE TO A LENGTH APPROXIMATING THAT OF THE FILAMENT, PLACING THE TAPE IN CIRCUMSCRIBING RELATION TO THE FILAMENT WHILE CONTINUING THE TENSION APPLYING STEP TO FORM A COMPOSITE MEMBER AND TO PROVIDE AN INTIMATE INTERSPERSION OF THE FILAMENT WITHIN THE SHEATH, AND COOLING THE COMPOSITE MEMBER, WHEREBY SAID ELONGATE THREAD HAS A BREAK STRENGTH AT LEAST APPROXIMATELY EQUAL TO THE BREAK STRENGTH OF SAID CORE AND TAPE COMBINED.
Claim 2
Dependent Claim
140 words
A PROCESS FOR MANUFACTUREIN AN ELONGATE THEREAD HAVING PHYSICAL PROPERTIES DIFFERENT FROM AND SUBSTANTIALLY SUPERIOR TO THE PHYSICAL PROPERTIES OF THE INDIVIDUAL COMPONENTS COMPRISING THE STEPS OF PROVIDING A CORE HAVING AT LEAST ONE FLAMENT, PROVIDING A TAPE OF POLYMERIC FILM HAVING A WIDTH GREATHER THAN THE CIRCUMFERENCE OF THE FLAMEMENT AND A LENGTH LESS THAN THE LENGTH OF THE FILAMENT, HEATING THE TAPE, APPLYING TENSION TO THE TAPE TO STRETCH THE TAPE TO A LENGTH APPROXIMATING THAT OF THE FILAMENT, PLACING THE TAPE IN CIRCUMSCRIBING RELATION TO THE FILAMENT WHILE CONTINUING THE TENSION APPLYING STEP TO FORM A COMPOSITE MEMBER AND TO PROVIDE AN INTIMATE INTERSPERSION OF THE FILAMENT WITHIN THE SHEATH, AND COOLING THE COMPOSITE MEMBER, WHEREBY SAID ELONGATE THREAD HAS A BREAK STRENGTH AT LEAST APPROXIMATELY EQUAL TO THE BREAK STRENGTH OF SAID CORE AND TAPE COMBINED.
Claim 3
Dependent Claim
37 words
A process according to claim 1 wherein said placing step includes the steps of providing a die having an opening corresponding to the shape of the elongate thread, and drawing the composite member through the die opening.
Claim 4
Dependent Claim
170 words
A process for manufacturing an elongate thread having physical properties different from and substantially superior to the physical properties of the individual components comprising the steps of providing a core having at least one filament, providing a tape of polymeric film having a width greater than the circumference of the filament, providing a die having an opening corresponding to the desired cross-sectional shape of the thread, introducing the tape and the core into the die opening with the tape in circumscribing relation to the core and to provide an intimate interspersion of the filament within the sheath heating at least the tape, drawing the tape and core through the die opening to form a composite member, said drawing step being performed so as to tension the tape sufficient to elongate the tape relative to the core, and cooling the composite member after performance of the drawing step, whereby said elongate thread has a break strength at least approximately equal to the break strength of said core and tape combined. 3.
Claim 5
Dependent Claim
170 words
A process for manufacturing an elongate thread having physical properties different from and substantially superior to the physical properties of the individual components comprising the steps of providing a core having at least one filament, providing a tape of polymeric film having a width greater than the circumference of the filament, providing a die having an opening corresponding to the desired cross-sectional shape of the thread, introducing the tape and the core into the die opening with the tape in circumscribing relation to the core and to provide an intimate interspersion of the filament within the sheath heating at least the tape, drawing the tape and core through the die opening to form a composite member, said drawing step being performed so as to tension the tape sufficient to elongate the tape relative to the core, and cooling the composite member after performance of the drawing step, whereby said elongate thread has a break strength at least approximately equal to the break strength of said core and tape combined. 3.
Claim 6
Dependent Claim
11 words
AN ELONGATE THREAD FORMED ACCORDING TO THE PROCESS OF CLAIM 3.
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |