US3929013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defect-detecting method and apparatus
Assignee: Deering Milliken Research Corp
•
Filing: 1974-04-11
•
Granted: 1975-12-30
•
Expires: 1994-04-11
Abstract
Abstract A method for detecting defects in textile yarns comprising the steps of withdrawing yarns from packages, winding each yarn a plurality of wraps around a support surface with the wraps of each yarn being displaced from the wraps of adjacent yarns, applying a composition comprising a colorant and a solvent mixture to the yarn wraps on the support surface, permitting the composition to undergo phase separation, and comparing the resulting depths of shade of the respective yarn wraps. Also, apparatus for conducting such method.
Inventors
- 👤 James E Hendrix
- 👤 Hans H Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; D; D06; D06H; D06H3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A method for detecting defects in textile yarns comprising the steps of withdrawing yarns from packages, winding each yarn under substantially equal tension a plurality of wraps around a support surface with the wraps of each yarn being displaced from the wraps of adjacent yarns, applying a composition comprising a colorant and a solvent mixture to the yarn wraps on said support surface, permitting said composition to undergo phase separation, and comparing the resulting depths of shade of the respective yarn wraps.
Claim 2
Independent Claim
82 words
A method for detecting defects in textile yarns comprising the steps of withdrawing yarns from packages, winding each yarn under substantially equal tension a plurality of wraps around a support surface with the wraps of each yarn being displaced from the wraps of adjacent yarns, applying a composition comprising a colorant and a solvent mixture to the yarn wraps on said support surface, permitting said composition to undergo phase separation, and comparing the resulting depths of shade of the respective yarn wraps.
Claim 3
Dependent Claim
23 words
A method according to claim 1 wherein each yarn is wound around the support surface until contact with adjacent yarn wraps is achieved.
Claim 4
Dependent Claim
17 words
A method according to claim 1 wherein said composition is applied to the yarn wraps by spraying.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |