US4670953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming warp beam of uniform diameter
Assignee: Mitsubishi Chemical Corp
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Filing: 1985-09-06
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Granted: 1987-06-09
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Expires: 2005-09-06
Abstract
Abstract A method and device for forming a warp beam of uniform diameter by feedback control of winding tension, in which a signal obtained from local winding tensions, each corresponding to a tension of a yarn at a certain widthwise position, are utilized for adjusting the position and width of a reed so that distribution of the warp on the beam is improved and an intra-beam diameter difference is compensated. One of the signals obtained from the local winding tensions is utilized for adjusting the rotational speed of rollers so that an inter-beam diameter difference is compensated. Thus, a warp beam without intra- or inter-beam diameter difference can always be produced.
Inventors
- 👤 Hisashi Kanda
- 👤 Susumu Nario
- 👤 Kazuhiko Morifuji
- 👤 Yuzo Kawada
- 👤 Takashi Sakai
- 👤 Takeshi Kawada
- 👤 Katsura Shimada
- 👤 Mitsuo Tsuneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:27
CPC Classifications
D; D02; D02H; D02H5/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
156 words
A method for forming a warp beam of uniform diameter in a warper, comprising feeding warp yarns from a source by means for positively delivering said warp yarns to a driven warp beam, all of which have the same speed and guiding said warp yarns by a reed to the warp beam, comprising the steps of: continuously measuring at a location between the positive feeding means and the reed a local winding tension of said positively delivered warp yarns at a plurality of portions of a warp sheet to be wound on said warp beam, including opposite side portions thereof; determining an intrabeam diameter difference from said measured local winding tension values; generating a control signal as a function of said difference; and automatically adjusting a geometric parameter of said reed in accordance with said control signal to improve the warp yarn distribution on said beam and compensate for the intrabeam diameter difference on said beam.
Claim 2
Independent Claim
156 words
A method for forming a warp beam of uniform diameter in a warper, comprising feeding warp yarns from a source by means for positively delivering said warp yarns to a driven warp beam, all of which have the same speed and guiding said warp yarns by a reed to the warp beam, comprising the steps of: continuously measuring at a location between the positive feeding means and the reed a local winding tension of said positively delivered warp yarns at a plurality of portions of a warp sheet to be wound on said warp beam, including opposite side portions thereof; determining an intrabeam diameter difference from said measured local winding tension values; generating a control signal as a function of said difference; and automatically adjusting a geometric parameter of said reed in accordance with said control signal to improve the warp yarn distribution on said beam and compensate for the intrabeam diameter difference on said beam.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said continuous measuring step comprises the step of engaging said warp yarns with tension meters.
Claim 4
Dependent Claim
99 words
A method defined by claim 1, further comprising the steps of: storing a time dependent tension pattern; performing said step of continuously measuring a local winding tension for a plurality of said warp sheets; comparing a measured reference winding tension at a middle portion of each of said warp sheets with said stored tension pattern and determining a second difference therebetween; and adjusting the positive feeding means and the driven warp beam for each of said warp sheets in such a way as to eliminate said second difference, whereby an inter-beam diameter difference among the warp beams is eliminated.
Claim 5
Dependent Claim
46 words
A method defined by claim 1, wherein the local winding tension is measured at a middle portion of the warp sheet and at opposite side portions, and wherein said intra-beam diameter difference is determined using a value obtained from the middle portion as a reference value.
Claim 6
Dependent Claim
96 words
A method defined by claim 4, further comprising the steps of: storing a time dependent tension pattern; performing said step of continuously measuring a local winding tension for a plurality of said warp sheets; comparing said measured reference winding tension at a middle portion of each warp sheets with said stored tension pattern and determining a second difference therebetween; adjusting the positive feeding means and the driven warp beam for each of said warp sheets in such a way as to eliminate said second difference, whereby an inter-beam diameter difference among the warp beams is eliminated.
References Cited (Backward Citations)
US3174207A
Cited
US3382352A
Cited
US3421193A
Cited
US3461518A
Cited
US3440700A
Cited
US3991448A
Cited
US4137614A
Cited
US4326322A
Cited
EP0023583A1
Cited
JPS5634661A
Cited
JPS5634662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-08 | 1990-12-08 | 1991-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-08 | 1994-12-08 | 1995-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-08 | 1998-12-08 | 1999-06-09 | $7700.00 | Window Closed / Lapsed |