Patent US3559965A successfully refreshed from Google Patents.
US3559965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating synthetic filaments
Assignee: Teijin Ltd
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Filing: 1969-07-18
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Granted: 1971-02-02
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Expires: 1989-07-18
Abstract
Abstract An apparatus for heating a great number of synthetic filaments or a tow uniformly and with good thermal efficiency in a slittype heater while having them run in and out of the slit by disposing a plurality of buffer plates in the slit to obstruct outside air flowing into the slit with the running filaments, and thereby prevent a drop of air temperature in the slit, and make possible a substantially constant air temperature transversely of the slit.
Inventors
- 👤 Kinyu Ishida
- 👤 Yasuhiro Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:24
CPC Classifications
D; D02; D02J; D02J13/00; D02J13/001; D01; D01D; D01D10/00; D01D10/02; D01D10/04; D01D10/0436; D01D10/0463; D02J1/00; D02J1/22; D02J1/224
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
A slit-type heater as claimed in claim 1 in which said buffer plates in one heater plate are offset in the direction of the length of the slit from the buffer plates in the other heater plate.
Claim 2
Dependent Claim
18 words
A slit-type heater as claimed in claim 1 in which said buffer plates are I-shaped in cross section.
Claim 3
Dependent Claim
28 words
A slit-type heater as claimed in claim 1 in which said buffer plates are T-shaped in cross section with the crossbar portion thereof adjacent the other heater plate.
Claim 4
Dependent Claim
28 words
A slit-type heater as claimed in claim 1 in which said buffer plates are L-shaped in cross section with the transverse portion thereof adjacent the other heater plate.
References Cited (Backward Citations)
US1656709A
Cited
US2624934A
Cited
US2877332A
Cited
US3319047A
Cited
US3349222A
Cited
US3387833A
Cited
US3444357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |