US3702055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing false twisted threads from thermoplastic resin tapes
Assignee: Mitsubishi Chemical Corp
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Filing: 1969-08-04
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Granted: 1972-11-07
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Expires: 1989-08-04
Abstract
Abstract A method for manufacturing false twisted thermoplastic thread from thermoplastic resin tape comprises passing the tape through a region wherein an eddy stream of a high temperature high pressure fluid such as steam, superheated steam and air is present. The eddy stream is produced by eccentrically jetting a high pressure fluid of a temperature not lower than the plasticizing point having the thermoplastic resin tape into a cylindrical thread forming tube. The thermoplastic resin tape is false twisted so as to form a cylindrical bundled thread and simultaneously thermoset in the bundled form all by the effect of the eddy stream.
Inventors
- 👤 Kenzo Kosaka
- 👤 Masami Tsunewaki
- 👤 Hideo Tanaka
- 👤 Akira Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:38
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; D02; D02G; D02G1/00; D02G1/02; D02G1/0286; Y; Y10; Y10S; Y10S57/00; Y10S57/907
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
111 words
A method for manufacturing false twisted thermoplastic resin threads comprising: feeding a thermoplastic resin tape into a cylindrical thread forming means, eccentrically jetting a high pressure fluid having a temperature not lower than the plasticizing temperature of said thermoplastic resin tape into said thread forming means to form an eddy stream of said fluid within said thread forming means effective to false twist and split the fed tape by a twisting action of said eddy stream to convert the resin tape to a cylindrical bundled thread form, simultaneously thermo-setting said cylindrical bundled thread form by the heating effect of said fluid, and delivering said resultant thread from said thread forming means.
Claim 2
Independent Claim
111 words
A method for manufacturing false twisted thermoplastic resin threads comprising: feeding a thermoplastic resin tape into a cylindrical thread forming means, eccentrically jetting a high pressure fluid having a temperature not lower than the plasticizing temperature of said thermoplastic resin tape into said thread forming means to form an eddy stream of said fluid within said thread forming means effective to false twist and split the fed tape by a twisting action of said eddy stream to convert the resin tape to a cylindrical bundled thread form, simultaneously thermo-setting said cylindrical bundled thread form by the heating effect of said fluid, and delivering said resultant thread from said thread forming means.
Claim 3
Dependent Claim
14 words
A method as set forth in claim 1, in which said fluid is air.
Claim 4
Dependent Claim
18 words
A method as set forth in claim 2, in which said polyolefine resin tape is a polypropylene tape.
Claim 5
Dependent Claim
19 words
A method as set forth in claim 2, in which said polyolefine resin tape is a polyethylene resin tape.
Claim 6
Dependent Claim
26 words
A method as set forth in claim 2, in which said polyolefine resin tape is a mixed resin tape consisting of polypropylene resin and polyethylene resin.
Claim 7
Dependent Claim
27 words
A method as set forth in claim 5, said mixed resin tape consists of 60 to 95 percent polypropylene resin and 5 to 40 percent polyethylene resin.
Claim 8
Dependent Claim
14 words
A method as set forth in claim 1, in which said fluid is steam.
Claim 9
Dependent Claim
15 words
A method as set forth in claim 7, in which said steam is superheated steam.
Claim 10
Dependent Claim
19 words
A method as set forth in claim 1, in which said thermoplastic resin tape is a polyolefine resin tape.
Claim 11
Dependent Claim
17 words
A method as set forth in claim 1, said thermoplastic resin tape is an acrylic resin tape.
Claim 12
Dependent Claim
20 words
A method as set forth in claim 1, in which said thermoplastic tape is a highly oriented thermoplastic resin tape.
Claim 13
Dependent Claim
20 words
A method as set forth in claim 1, in which a pressure of said fluid is 0.5 to 10 kg/cm2.
Claim 14
Dependent Claim
20 words
A method as set forth in claim 12, in which said pressure of said fluid is 2 to 4 kg/cm2.
Claim 15
Dependent Claim
35 words
A method as set forth in claim 1, in which said resultant thread is delivered at a delivering velocity of 80 to 110 percent with respect to a feeding velocity of said thermoplastic resin tape.
Claim 16
Dependent Claim
22 words
A method as set forth in claim 14, in which said delivering velocity is 90 to 100 percent of said feeding velocity.
Claim 17
Dependent Claim
23 words
A method as set forth in claim 1, further comprising heating said fluid jetted into said thread forming means to a desired temperature.
Claim 18
Dependent Claim
29 words
A method as set forth in claim 1, in which at least two thermoplastic resin tapes are fed into said cylindrical thread forming means in a parallel tape form.
Claim 19
Dependent Claim
32 words
A method as set forth in claim 1, in which said thermoplastic resin tape which is just manufactured through a tape manufacturing means is successively fed into said cylindrical thread forming means.
Claim 20
Dependent Claim
18 words
A method as set forth in claim 1, further comprising thermo-treating said resultant thread at a desired temperature.
Claim 21
Dependent Claim
24 words
A method as set forth in claim 19, in which said thermo-treating temperature is at least a melting point of said thermoplastic resin tape.
Claim 22
Independent Claim
74 words
A method for manufacturing resin threads comprising: providing a plasticizable resin tape to be formed into a thread; longitudinally advancing said resin tape through a cylindrical zone; and contacting the advancing resin tape within said cylindrical zone with a fluid vortex having sufficient temperature and pressure to effect splitting and bundling of the resin tape into a cylindrical thread accompanied by heat-setting of the cylindrical thread by the heat energy of the fluid vortex.
Claim 23
Independent Claim
74 words
A method for manufacturing resin threads comprising: providing a plasticizable resin tape to be formed into a thread; longitudinally advancing said resin tape through a cylindrical zone; and contacting the advancing resin tape within said cylindrical zone with a fluid vortex having sufficient temperature and pressure to effect splitting and bundling of the resin tape into a cylindrical thread accompanied by heat-setting of the cylindrical thread by the heat energy of the fluid vortex.
Claim 24
Dependent Claim
60 words
A method according to claim 21; wherein said contacting step comprises contacting the advancing resin tape at an upstream portion of said cylindrical zone sufficiently remote from the downstream end thereof to ensure that the bundled resin tape is heated enough by the fluid making-up said fluid vortex to effectively heat-set the bundled resin tape in its cylindrical thread configuration.
Claim 25
Dependent Claim
24 words
A method according to claim 21; wherein said fluid vortex has a temperature not lower than the plasticizing temperature of said plasticizable resin tape.
Claim 26
Dependent Claim
22 words
A method according to claim 21; wherein said fluid vortex has a pressure within the range of from 0.5 to 10 Kg/cm2.
Claim 27
Dependent Claim
57 words
A method according to claim 21; wherein said advancing step comprised longitudinally advancing said resin tape through said cylindrical zone from an entrance end thereof to an exit end thereof and wherein the advancing rate of the bundled resin tape at said exit end is 80 to 110% that of the resin tape at said entrance end.
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |