US3831444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yarn quality assessment method and apparatus therefor
Assignee: Kurabo Industries Ltd
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Filing: 1973-01-26
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Granted: 1974-08-27
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Expires: 1993-01-26
Abstract
Abstract A method and apparatus for assessing knitting quality of yarn which comprises a plurality of elements which operatively cooperate so that some prediction can be made about the knitting quality of the yarn by the detection of the accumulated value of the resistances to various forces as a yarn winding tension, and by the comparison of the data with the respective standard value, an evaluation of the yarn can be made easily and simply before the yarn is knitted.
Inventors
- 👤 T Sasaki
- 👤 K Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:59
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08; G01N3/56; G01N33/00; G01N33/36; G01N33/365; G01N2203/00; G01N2203/02; G01N2203/026; G01N2203/0262; G01N2203/0278; G01N2203/028
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
155 words
A method for assessing the knitting quality of yarn and similar materials comprising placing a cone or similar mass of yarn the quality of which is to be assessed in a fixed position, passing said yarn in an unwinding direction from said cone and successively through a means for imposing resistances on said yarn including yarn to yarn frictional resistance, yarn to needle frictional resistance, and bending resistance, and then winding said yarn up at a constant speed by a take up means for unwinding the yarn from the cone for imposing an unwinding resistance thereon and imposing yarn to yarn frictional resistance, yarn to needle frictional resistance and bending resistance on said yarn, and detecting at a point between the last of said resistance means and take up means the yarn tensile force representing the accumulative value of said resistance imposed on said yarn, and comparing the detected value with previously determined standard values.
Claim 2
Independent Claim
155 words
A method for assessing the knitting quality of yarn and similar materials comprising placing a cone or similar mass of yarn the quality of which is to be assessed in a fixed position, passing said yarn in an unwinding direction from said cone and successively through a means for imposing resistances on said yarn including yarn to yarn frictional resistance, yarn to needle frictional resistance, and bending resistance, and then winding said yarn up at a constant speed by a take up means for unwinding the yarn from the cone for imposing an unwinding resistance thereon and imposing yarn to yarn frictional resistance, yarn to needle frictional resistance and bending resistance on said yarn, and detecting at a point between the last of said resistance means and take up means the yarn tensile force representing the accumulative value of said resistance imposed on said yarn, and comparing the detected value with previously determined standard values.
Claim 3
Dependent Claim
49 words
A method according to claim 1, wherein the accumulated resistances on the yarn is detected by placing a weight on said yarn and comparing the movement of said weight between predetermined limits due to yarn tensile force with the similar movement of said weight for a good quality yarn.
Claim 4
Dependent Claim
45 words
A method according to claim 1, wherein the accumulated resistance on the yarn is detected by detecting the position of the free end of a chain when the other end of the chain is suspended from the yarn which has settled in a fixed position.
Claim 5
Dependent Claim
50 words
A method according to claim 1, wherein the accumulated resistance on the yarn is detected by detecting the position of a floating pulley around which the yarn is run and to which is connected one end of a chain the other end of which is kept at a fixed position.
Claim 6
Independent Claim
135 words
An apparatus for assessing the knitting quality of yarn comprising a means for leading yarn from a cheese or cone or similar device in an unwinding direction, means for winding in said yarn at a constant speed, a means between said leading means and said winding means for generating resistances to be imposed on said yarn including yarn to yarn frictional resistance, needle to yarn frictional resistance and bending resistance in a yarn passed therethrough, a detecting means between said resistance generating means and said winding means for detecting a yarn tensile force representing the accumulative value of said resistances including unwinding resistance imposed on said yarn, and a means operatively associated with said detecting means for measuring said accumulative tensile force detected by said detecting means in comparison with a previously determined standard value.
Claim 7
Independent Claim
135 words
An apparatus for assessing the knitting quality of yarn comprising a means for leading yarn from a cheese or cone or similar device in an unwinding direction, means for winding in said yarn at a constant speed, a means between said leading means and said winding means for generating resistances to be imposed on said yarn including yarn to yarn frictional resistance, needle to yarn frictional resistance and bending resistance in a yarn passed therethrough, a detecting means between said resistance generating means and said winding means for detecting a yarn tensile force representing the accumulative value of said resistances including unwinding resistance imposed on said yarn, and a means operatively associated with said detecting means for measuring said accumulative tensile force detected by said detecting means in comparison with a previously determined standard value.
Claim 8
Dependent Claim
55 words
An apparatus according to claim 5, wherein said detecting means comprises a floating pulley which is suspended on said yarn on which said accumulative tensile acts upwards, and said measuring means comprises a weight attached to said floating pulley so as to urge it downwardly and vertically spaced limit means between which said weight moves.
Claim 9
Dependent Claim
26 words
An apparatus according to claim 5, wherein said detecting means comprises a floating pulley which is suspended on the yarn to detect said accumulative tensile force.
Claim 10
Dependent Claim
84 words
An apparatus according to claim 5, wherein said detecting means comprises a floating pulley which is suspended on said yarn on which said accumulative tensile force acts upwards, and said measuring means comprises a freely suspended chain, one end of which is attachEd to said pulley, and a means that can be moved and fixed and to which the other end of said chain is attached so as to vary the fraction of the weight of said chain imposed downwardly on said floating pulley.
Claim 11
Dependent Claim
45 words
An apparatus according to claim 5, wherein said generating means includes at least one pulley for guiding the yarn and at least one needle held by a holder through which the yarn is passed, both said pulley and needle being respectively fixed at certain positions.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |