US3763520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for transferring tows
Assignee: Teijin Ltd
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Filing: 1971-09-02
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Granted: 1973-10-09
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Expires: 1991-09-02
Abstract
Abstract The present invention relates to methods and apparatus for displacing the travelling path of tows in substantially parallel form in a process for advancing and transferring tows. Tow feed roller means and take-up roller means therefor are disposed in parallel and a plurality of guide cylinders are arranged therebetween, at least two of the guide cylinders being disposed in nonparallel relation with both the feed and take-up rollers such that distortions are not caused in the plane of the tows going around the rollers. The lengths of the tows travelling between the feed and take-up roller means are thus made substantially equal at any portion across the tows thereby preventing uneven tow tension in the advancing tows.
Inventors
- 👤 N Izawa
- 👤 H Toyoshima
- 👤 N Kikuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:43
CPC Classifications
B; B65; B65H; B65H23/00; B65H23/04; B65H23/02; B65H2301/00; B65H2301/30; B65H2301/35; B65H2301/351; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/4146; B65H2404/00; B65H2404/10; B65H2404/15; B65H2404/152; B65H2404/1521; B65H2404/15212
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
218 words
In a method for advancing and transferring tows through a plurality of guide cylinders between feed roller means and takeup roller means, the axes of said feed roller means and said take-up roller means being substantially parallel to each other, the improvement comprising arranging the axes of at least two of said guide cylinders in nonparallel relation with the axes of said feed and take-up roller means; arranging respectively in a plane each pair of a line defining a position where the tow departs fRom said feed roller means or one of said guide cylinders and a line defining a position where the tow arrives at one of said guide cylinders or said take-up roller means, said pair of lines being, respectively, on a pair of members consisting of (a) said feed roller means and one of said guide cylinders, (b) two of said guide cylinders, or (c) one of said guide cylinders and said take-up roller means, each pair of members being adjacent to each other along the path of travel of the tows; and moving the advancing tows from said feed roller means to contact in succession said guide cylinders and reach said take-up roller means while changing the advancing directions of the tows to thereby displace the tows paths in parallel in a plane figure.
Claim 2
Dependent Claim
218 words
In a method for advancing and transferring tows through a plurality of guide cylinders between feed roller means and takeup roller means, the axes of said feed roller means and said take-up roller means being substantially parallel to each other, the improvement comprising arranging the axes of at least two of said guide cylinders in nonparallel relation with the axes of said feed and take-up roller means; arranging respectively in a plane each pair of a line defining a position where the tow departs fRom said feed roller means or one of said guide cylinders and a line defining a position where the tow arrives at one of said guide cylinders or said take-up roller means, said pair of lines being, respectively, on a pair of members consisting of (a) said feed roller means and one of said guide cylinders, (b) two of said guide cylinders, or (c) one of said guide cylinders and said take-up roller means, each pair of members being adjacent to each other along the path of travel of the tows; and moving the advancing tows from said feed roller means to contact in succession said guide cylinders and reach said take-up roller means while changing the advancing directions of the tows to thereby displace the tows paths in parallel in a plane figure.
Claim 3
Dependent Claim
38 words
A method as set forth in claim 1 in which the parallel displacement of the tow paths is adjusted by changing the angle of said guide cylinders relative to the axes of said feed and take-up roller means.
Claim 4
Dependent Claim
29 words
A method as set forth in claim 1 in which the parallel displacement of the tow paths is adjusted by changing the intervals between at least two guide cylinders.
Claim 5
Dependent Claim
38 words
A method as set forth in claim 1 in which the parallel displacement of the tow paths is adjusted by changing the interval between one of said guide cylinders and one of said feed or take-up roller means.
Claim 6
Dependent Claim
28 words
A method of claim 1 in which there are only two of said guide cylinders, said two guide cylinders being disposed in substantially parallel relation to each other.
Claim 7
Dependent Claim
63 words
In apparatus for transferring tows from feed roller means to take-up roller means having substantially parallel axes of rotation by displacing tow paths in parallel form, the improvement comprising two guide cylinders disposed in substantially parallel relation to each other between said feed and take-up roller means, said two guide cylinders being disposed in nonparallel relation to said feed and take-up roller means.
Claim 8
Dependent Claim
63 words
In apparatus for transferring tows from feed roller means to take-up roller means having substantially parallel axes of rotation by displacing tow paths in parallel form, the improvement comprising two guide cylinders disposed in substantially parallel relation to each other between said feed and take-up roller means, said two guide cylinders being disposed in nonparallel relation to said feed and take-up roller means.
Claim 9
Dependent Claim
25 words
An apparatus as set forth in claim 6 in which at least one of said two guide cylinders is movable in parallel with the other.
Claim 10
Dependent Claim
30 words
An apparatus as set forth in claim 6 in which angles between the axes of said two guide cylinders and axes of said feed and take-up roller means are adjustable.
Claim 11
Dependent Claim
25 words
An apparatus as set forth in claim 8 in which at least one of said two guide cylinders is movable in parallel to the other.
Claim 12
Dependent Claim
15 words
An apparatus as set forth in claim 6 in which said guide cylinders are rotatable.
Claim 13
Dependent Claim
15 words
An apparatus as set forth in claim 6 in which said guide cylinders are stationary.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |