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US3625811A
Expired / Lapsed
US
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Method of preparing yarn and the like from animal hide
Assignee: Fujita Shoten KK
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Filing: 1968-01-19
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Granted: 1971-12-07
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Expires: 1988-01-19
Abstract
Abstract Collagen fiber is obtained from limed animal hide by a process which involves reliming, treating with an enzyme, and finally, beating to loosen the fiber structure of the hide. The fiber structure is then opened mechanically to obtain collagen fiber. The collagen fiber obtained is readily spun into yarn or string. Either the collagen fiber or the spun collagen yarn or string is treated with modifying agents such as tanning agents to improve its characteristics. The collagen yarn and string may be used for a large variety of knitted and woven products.
Inventors
- 👤 Hiroshi Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
D; D01; D01C; D01C3/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
21 words
A method according to claim 1 wherein said split pelt is obtained from the shoulder and belly portions of limed hide.
Claim 2
Dependent Claim
20 words
A method according to claim 1 wherein said placing step is carried out for a duration of about 8 days.
Claim 3
Dependent Claim
30 words
A method according to claim 1 wherein said treating step is carried out from 20 to 60 minutes at a temperature within a range of from 30* to 35* C.
Claim 4
Dependent Claim
24 words
A method according to claim 1 wherein said enzyme is used in an amount of 40 to 80 pu per g. of said pelt.
Claim 5
Dependent Claim
38 words
A method according to claim 1 wherein said pelt is dried and then aged for a period of up to 2 weeks in a zone having a relative humidity, between 85- 95 percent prior to beating said pelt.
Claim 6
Dependent Claim
23 words
A method according to claim 1 in which said collagen fiber is spun into yarn prior to being treated with said tanning agent.
Claim 7
Dependent Claim
22 words
A method according to claim 1 in which said collagen fiber is spun into yarn after being treated with said tanning agent.
Claim 8
Dependent Claim
32 words
A method as according to claim 1 wherein said tanning agent is selected from the group consisting of chrome complex salt, aluminum salt of high basicity, vegetable tannin, synthetic tannin and aldehyde.
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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |