US4438548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling fluctuations in sliver weight on cards, carding machines and the like
Assignee: Zellweger Uster AG
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Filing: 1980-09-30
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Granted: 1984-03-27
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Expires: 2000-09-30
Abstract
Abstract A regulation of the density of the fibre clothing on cards, carding engines and the like is described which is based on measuring the torque which has to be used for the drive of the licker-in or the cylinder. The signal corresponding to this torque is compared with a desired value which is either arbitrarily adjustable or is obtained from a sliver count measuring member or constitutes a combination of the two. The torque is either measured by measuring the power consumption for the drive of the licker-in and/or the cylinder, or by measuring the torsion of a torsion shaft, or by measuring the slip occurring in a variable coupling.
Inventors
- 👤 Werner Grunder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:03
CPC Classifications
D; D01; D01G; D01G23/00; D01G23/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
A method for controlling fluctuations in sliver weight on a device for processing a fiber sliver, wherein a fibrous material is fed to a card, or the like and is withdrawn as a sliver, comprising the steps of measuring the torque or the power of at least one rotating part of the card, or the like, upon which a fiber material is leveled and distributed and producing a control signal indicative thereof; and controlling the rate at which said fibrous material is fed as a function of said control signal in a manner that said torque, or said power, is held to a control value.
Claim 2
Independent Claim
105 words
A method for controlling fluctuations in sliver weight on a device for processing a fiber sliver, wherein a fibrous material is fed to a card, or the like and is withdrawn as a sliver, comprising the steps of measuring the torque or the power of at least one rotating part of the card, or the like, upon which a fiber material is leveled and distributed and producing a control signal indicative thereof; and controlling the rate at which said fibrous material is fed as a function of said control signal in a manner that said torque, or said power, is held to a control value.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein said control value is adjusted during processing.
Claim 4
Dependent Claim
21 words
A method according to claim 1 or 2, wherein said control value is determined by at least one other measuring operation.
Claim 5
Dependent Claim
22 words
A method according to claim 1, wherein the torque or the power of a licker-in is measured to produce the control signal.
Claim 6
Dependent Claim
22 words
A method according to claim 1, wherein the torque or the power of a cylinder is measured to produce the control signal.
Claim 7
Dependent Claim
23 words
A method according to claim 1, wherein the torque or the power of a feed roller is measured to produce the control signal.
Claim 8
Dependent Claim
42 words
A method according to claim 1, wherein the torque or the power of a licker-in and a cylinder are measured and the total of the torques or the power of the licker-in and the cylinder is used to produce the control signal.
Claim 9
Independent Claim
118 words
A system for controlling fluctuations in sliver weight on a device for processing fiber sliver of the type, wherein a fibrous material is fed by a feed roller to a card, or the like and is withdrawn as a sliver, comprising means for measuring the torque or power of at least one rotating part of the card, or the like and producing an output indicative thereof, a controllable drive for the feed roller, and a controller interconnected between said means for measuring and said controllable drive so as to control the speed of the feed roller so as to feed said fibrous material in a manner that said torque, or said power is held to a control value.
Claim 10
Independent Claim
118 words
A system for controlling fluctuations in sliver weight on a device for processing fiber sliver of the type, wherein a fibrous material is fed by a feed roller to a card, or the like and is withdrawn as a sliver, comprising means for measuring the torque or power of at least one rotating part of the card, or the like and producing an output indicative thereof, a controllable drive for the feed roller, and a controller interconnected between said means for measuring and said controllable drive so as to control the speed of the feed roller so as to feed said fibrous material in a manner that said torque, or said power is held to a control value.
Claim 11
Dependent Claim
35 words
A system according to claim 8, wherein said means for measuring comprises a power meter associated with a driving motor for the at least one rotating part for determining the torque or the power thereof.
Claim 12
Dependent Claim
16 words
A system according to claim 8, wherein said means for measuring comprises a mechanical torsion meter.
Claim 13
Dependent Claim
19 words
A system according to claim 10, wherein said torsion meter comprises a drive shaft constructed as a torque rod.
Claim 14
Dependent Claim
15 words
A system according to claim 8, wherein the means for measuring comprises an inductive transmitter.
Claim 15
Dependent Claim
29 words
A system according to claim 12, wherein the inductive transmitter comprises an inductively-acting slip coupling between a driving motor and driving shaft of the at least one rotating part.
Claim 16
Dependent Claim
28 words
A system according to claim 8, comprising at least one adjusting controller for feeding in said control value for the torque to the controller for the feed roller.
Claim 17
Dependent Claim
33 words
A system according to claim 14, comprising at least one measuring member for determining the sliver thickness, the output of said measuring member being fed to said adjusting controller, for said control value.
Claim 18
Dependent Claim
46 words
A system according to claim 14, comprising a tacho-generator at delivery members of the card, carding engine or the like for obtaining a control signal corresponding to the delivery speed, the delivery speed control signal being fed to said adjusting controller for determining said control value.
References Cited (Backward Citations)
DE1266189B
Cited
GB1140661A
Cited
US3435673A
Cited
DE1921248A1
Cited
DE2113140A1
Cited
US4161052A
Cited
US4271565A
Cited
US4257147A
Cited
WO1981002029A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |