US3878872A - Warp let-off means - Google Patents
Warp let-off means Download PDFInfo
- Publication number
- US3878872A US3878872A US401277A US40127773A US3878872A US 3878872 A US3878872 A US 3878872A US 401277 A US401277 A US 401277A US 40127773 A US40127773 A US 40127773A US 3878872 A US3878872 A US 3878872A
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- US
- United States
- Prior art keywords
- warp
- cloth
- feed roller
- roller
- tension
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D49/00—Details or constructional features not specially adapted for looms of a particular type
- D03D49/04—Control of the tension in warp or cloth
- D03D49/06—Warp let-off mechanisms
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
The speed of the warp feed roller is controlled in dependence on the warp tension in the weaving machine via a control motor. The speed of the motor is regulated by signals obtained from a pressure sensor on the breast beam which sensor measures the pressure of the produced cloth on the breast beam. The control signals can also be obtained from a measurement of the rate of cloth draw-off. Alternatively, a torque pick-off can be used to measure cloth tension in order to produce the control signal for the control motor.
Description
United States Patent Hintsch Apr. 22, 1975 l WARP LET-OFF MEANS 3.417.791 l2/l968 simmer 139 109 3.706.328 I2 1972 D .ikl 139 ll() [75] memo" 0m mmschwalhsene 3.753.452 si1973 221:1; 139i31 1 Switzerland 3.828.827 8/1974 Witt t al 139/99 [73] Assignee: Sulzer Brothers Ltd.. Winterthur. FORHGN PATENTS OR APPUCATIONS swtzefland 5911.112: 10/1934 Germany 139/99 [22] Filed: Sept. 27, 1973 580,746 9/1924 France 139/99 {2H Appl 401377 Primary l'..1un1mer.lames Kee Chi Amgrney. Agent. or FirmKenyon 8r. Kenyon Reilly [30] Foreign Application Priority Data Carr & Chapin Sept. 29 1972 Switzerland .1 l4294 72 [57] ABSTRACT [52] 39/99; 139/110? 39/31} The speed of the warp feed roller is controlled in de- [5 H f" Cl D03d 49/04 pendence on the warp tension in the weaving machine [58} new oi Search 139/99- 1 via a control motor. The speed of the motor is regu- 139/3041 31] lated by signals obtained from a pressure sensor on the breast beam which sensor measures the pressure of [56] References cued the produced cloth on the breast beam. The control UNITED STATES PATENTS signals can also be obtained from a measurement of 359 13 5 1953 H 139 X the rate of cloth draw-off. Alternatively. a torque 4,072154 M963 Locher v a 11 l39/l 1U pick-off can be used to measure cloth tension in order 1.125.127 3/1964 Locher 1 a i. 139/97 to produce the control signal for the control motor. 1308.854 3/1967 Pfarrwaller 1 1 1 [39/99 1.364.403 1/1968 Liebchcn (16/86 A 10 clalmsl Drawmg Flgure WARP LET-OFF MEANS This invention relates to a warp let-off means and particularly a warp let-off means for a weaving machine.
As is known. if a weaving machine is to produce a satisfactory fabric, the warp tension must be maintained at a constant value during processing in the machine. ln order to do this. it has been known to utilize a warp let-off device in which the warp tension is controlled by a feed roller around which the warp extends. The feed roller is rotated by the warp and is braked continuously by means of a friction clutch in dependence upon the warp tension. However, this controlled braking technique has a disadvantage in that the coefficient of friction ofthc clutch is not truly constant. Thus. it is impossible to control the feed roller braking. and therefore warp tension. accurately.
Accordingly. it is an object of the invention to accurately control the warp tension in a weaving machine.
It is another object of the invention to control warp tension in a weaving machine by monitoring the warp tensionv Briefly. the invention provides a weaving machine having a warp feed roller with a warp let-off means for driving the feed roller. The let-off means includes a warp tension control circuit having a control element for controlling the speed of the feed roller in dependence upon warp tension in the machine. The control element constitutes a motor which drives the feed roller.
The capability of being able to control warp tension accurately is particularly important in the weaving of very wide fabrics involving the use of two or more warp beams. for although warp beam radii are never exactly the same. the tensions of the individual warps must be not only constant but also equal to one another.
Advantageously. the variable for the control circuit is derived from a pressure sensor which is disposed on the breast beam of the weaving machine and which produces a control signal corresponding to warp tension. The pressure sensor can be a strain gauge which is secured to the breast beam to measure the sag of the beam as a measure of cloth tension and therefore warp tension. Another possibility is for the variable to be produced by a torque pick-off coupled with the cloth draw-off roller. Also. the speed of the cloth draw-off can be used as the variable signal for the control circuit.
These and other objects and advantages of the invention will become more apparent from the following detailed description and appended claims taken in conjunction with the accompanying drawings in which:
The FIGURE diagrammatically illustrates a weaving machine having a warp let-off means according to the invention.
Referring to the drawing. the weaving machine comprises a warp beam 1 having a warp 2. The beam l is braked continuously by means of a brake drum 4 and a cable or rope 5 which extends therearound and which has a weight 6. The warp passes around a deflecting roller 7 and a feed roller 8 associated with a back-up roller 9. The feed roller 8 has a friction-increasing covering and serves to feed the warp yarns into the machine to form a shed 10. The finished cloth ll goes to. and is wound on, a cloth beam (not shown) by way of a breast beam 12, cloth drawoff roller or stepping beam 13 and a deflecting roller 14. The roller I3 is connected to a drive device l5 (shown in diagrammatic form).
The feed roller Sis connected to a warp let-off means which includes a drive system comprising a worm 20. wormwheel 21 and. secured to the roller 8, a gear wheel 22. The worm 20 is secured to a drive shaft 23 of a control element or regulating motor 24 whose speed is controlled in dependence upon warp tension by an electronic control circuit to be described hereinafter.
Disposed on the breast beam 12 is a pressure sensor or transducer 30 which provides a continuous measure ment of the pressure of the cloth H on the breast beam 12. Since such pressure corresponds to the tension of the finished cloth and such tension is identical to the warp tension. the sensor 30 produces a control signal L; which corresponds to warp tension and will therefore be referred to hereinafter as the warp tension signal. Warp tension signal .v,. is compared in a comparator 3| with a warp tension set value .v,,-. The result ofthe comparison is the comparator output signal .r,, and is supplied to a controller 32 which produces a final control signal Y for the motor 24. The speed of the motor 24 and. therefore. the speed of roller 8 i.e.. the quantity of warp let off the warp beam 1. and therefore warp tension. are controlled in dependence upon the value Y.
The sensor 30 can be. e.g.. an electric load cell or a strain gauge secured to the breast beam l2 for measuring a signal corresponding the breast beam sag due to cloth tension. The advantage of placing the pressure sensor 30 on the breast beam I2 is that if more than one warp beam is used. warp tension can be detected at the same place.
The control circuit also comprises a deviation sensor 33 which is directly coupled with the cloth draw-off roller drive device 15. The reason for detecting the deviation of the cloth take off speed in this way is as follows:
Warp consumption per unit oftime i.e.. the length of warp let offa warp beam per unit of time. of a weaving machine is determined with reference to cloth parameters. such as the fineness of the warp yarns and the material of which they are made. and can be considered to be constant for a given cloth density (number of wefts per centimeter (cm) of cloth length). Consequently. the rate of cloth draw-off determines feed roller speed and hence warp consumption and hence warp tension, assuming that the warp is worked in a particular way [warp working depends upon warp density (number of warp yarns per centimeter) cloth texture. warp tension and yarn number]. The speed of cloth draw off can therefore be supplied to the control circuit as the control value i.e. disturbance variable. for warp tension.
At a given machine setting. the sensor 33 emits a constant variable signal Z which corresponds to warp tension. After processing in a deviation sensor 34. the signal Z is supplied to the controller 32 and contributes. according to its value. to determining the final control value Y for the motor 24.
The command variable. i.e.. the set value for a particular setting. is cloth tension. The set value can be ad justed to the selected cloth tension by means of a potentiometer.
Instead of the pressure sensor 30, a torque pick-off 35 coupled with the cloth draw-off roller 13 can be used. In this case. the pick-off 35 produces a signal .t',. corresponding to the cloth tension (which is the same as the warp tension such signal going via line 36 to the comparator 31.
Preferably. the motor 24 is a stepping motor ensuring accurate speed control of feed roller 8. If required, however. the motor 24 can be a steplessly variable threephase motor.
The warp let-off means according to the invention. although described herein for use with a weaving machine, is, of course. capable of use for other textile machinery having one or more warp beams. Also. a control circuit of some other kind than the electronic control circuit herein described. cg. a pneumatic or hydraulic control circuit. can be used.
What is claimed is:
1. In a weaving machine having a feed roller for feeding warp yarns into a shed and a breast beam downstream of said shed for passage of a produced cloth thereover; a warp let off means for driving said feed roller including an electronic warp tension control circuit having a control element for controiling the speed of said feed roller in dependence upon warp tension in said machine and a pressure sensor disposed on said breast beam for producing a control signal corresponding to warp tension in response to the pressure of the cloth on said breast beam for emission to said control element.
2. A weaving machine as set forth in claim I wherein said pressure sensor is a strain gauge secured to said breast beam.
3. A weaving machine as set forth in claim I further having a cloth take-off roller wherein said control circuit includes means for determining the speed of said dravv off roller as a measure of warp tension for com trolling said control element.
4. A weaving machine as set forth in claim 1 wherein said control element is a stepping motor.
5. A weaving machine as set forth in claim 1 wherein said control element is a steplessly variable three-phase motor.
6. In a weaving machine having a feed roller for feeding warp yarns into a shed. a breast beam downstream of said shed for passage of a produced cloth thereover and a cloth draw-off roller; :1 warp let-off means for driving said feed roller including an electronic warp tension control circuit having a control element for controlling the speed of said feed roller in dependence upon warp tension in said machine and a torque pickoff coupled to said draw-off roller to emit a control signal corresponding to warp tension to said control element.
7. Warp let-off apparatus for a weaving machine comprising a feed roller for feeding warp yarn from a warp beam into a shed;
driving means for driving said feed roller;
an electric control circuit controlling the speed of said driving means in dependence upon warp tension;
a breast beam for passage of produced cloth thereover;
a cloth draw-off roller for receiving a produced cloth thereon; and
a pressure transducer disposed on said breast beam to cause said control circuit to produce a control signal corresponding to warp tension in response to pressure of the cloth on said breast beam for controlling said drive means.
8. Warp let-off apparatus as set forth in claim 7 wherein said pressure transducer is a strain gauge secured to said breast beam.
9. Warp let-off apparatus for a weaving machine comprising a feed roller for feeding warp yarn from a warp beam into a shed;
driving means for driving said feed roller;
an electric control circuit controlling the speed of said driving means in dependence upon warp tension;
a cloth draw-off roller for receiving produced cloth thereon; and
a torque pick-off coupled to said draw-off roller to cause said control circuit to produce a control signal corresponding to warp tension for controlling said drive means.
10. Warp let-off apparatus as set forth in claim 9 wherein said control circuit further includes means for sensing the speed of said draw-off roller to emit a signal representing the disturbance variable for the warp tension for introduction into said control circuit.
Claims (10)
1. In a weaving machine having a feed roller for feeding warp yarns into a shed and a breast beam downstream of said shed for passage of a produced cloth thereover; a warp let off means for driving said feed roller including an electronic warp tension control circuit having a control element for controlling the speed of said feed roller in dependence upon warp tension in said machine and a pressure sensor disposed on said breast beam for producing a control signal corresponding to warp tension in response to the pressure of the cloth on said breast beam for emission to said control element.
1. In a weaving machine having a feed roller for feeding warp yarns into a shed and a breast beam downstream of said shed for passage of a produced cloth thereover; a warp let off means for driving said feed roller including an electronic warp tension control circuit having a control element for controlling the speed of said feed roller in dependence upon warp tension in said machine and a pressure sensor disposed on said breast beam for producing a control signal corresponding to warp tension in response to the pressure of the cloth on said breast beam for emission to said control element.
2. A weaving machine as set forth in claim 1 wherein said pressure sensor is a strain gauge secured to said breast beam.
3. A weaving machine as set forth in claim 1 further having a cloth take-off roller wherein said control circuit includes means for determining the speed of said draw-off roller as a measure of warp tension for controlling said control element.
4. A weaving machine as set forth in claim 1 wherein said control element is a stepping motor.
5. A weaving machine as set forth in claim 1 wherein said control element is a steplessly variable three-phase motor.
6. In a weaving machine having a feed roller for feeding warp yarns into a shed, a breast beam downstream of said shed for passage of a produced cloth thereover and a cloth draw-off roller; a warp let-off means for driving said feed roller including an electronic warp tension control circuit having a control element for controlling the speed of said feed roller in dependence upon warp tension in said machine and a torque pick-off coupled to said draw-off roller to emit a control signal corresponding to warp tension to said control element.
7. Warp let-off apparatus for a weaving machine comprising a feed roller for feeding warp yarn from a warp beam into a shed; driving means for driving said feed roller; an electric control circuit controlling the speed of said driving means in dependence upon warp tension; a breast beam for passage of produced cloth thereover; a cloth draw-off roller for receiving a produced cloth thereon; and a pressure transducer disposed on said breast beam to cause said control circuit to produce a control signal corresponding to warp tension in response to pressure of the cloth on said breast beam for controlling said drive means.
8. Warp let-off apparatus as set forth in claim 7 wherein said pressure transducer is a strain gauge secured to said breast beam.
9. Warp let-off apparatus for a weaving machine comprising a feed roller for feeding warp yarn from a warp beam into a shed; driving means for driving said feed roller; an electric control circuit controlling the speed of said driving means in dependence upon warp tension; a cloth draw-off roller for receiving produced cloth thereon; and a torque pick-off coupled to said draw-off roller to cause said control circuit to produce a control signal corresponding to warp tension for controlling said drive means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1429472A CH556416A (en) | 1972-09-29 | 1972-09-29 | CHAIN RELEASE DEVICE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3878872A true US3878872A (en) | 1975-04-22 |
Family
ID=4399617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US401277A Expired - Lifetime US3878872A (en) | 1972-09-29 | 1973-09-27 | Warp let-off means |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3878872A (en) |
| JP (1) | JPS5133222B2 (en) |
| AT (1) | AT322467B (en) |
| CH (1) | CH556416A (en) |
| CS (1) | CS175464B2 (en) |
| DE (1) | DE2248558A1 (en) |
| FR (1) | FR2201361B1 (en) |
| GB (1) | GB1446573A (en) |
| IT (1) | IT995516B (en) |
| SU (1) | SU485604A3 (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2365647A1 (en) * | 1976-09-27 | 1978-04-21 | Sulzer Ag | CONTROL DEVICE FOR UNWINDING THE CHAIN OF A WEAVING MACHINE |
| US4125131A (en) * | 1976-09-21 | 1978-11-14 | Adolph Saurer | Fixed driving connection between a guide roller and delivery roller of a loom |
| US4129154A (en) * | 1975-08-08 | 1978-12-12 | Bennelli Dore D | Electronic device for controlling the winding off of material wound up on a core by tensiometric control |
| US4402347A (en) * | 1980-04-03 | 1983-09-06 | Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi | Warp let-off and its drive in a loom |
| US4513790A (en) * | 1983-02-25 | 1985-04-30 | Tsudakoma Corp. | Method and apparatus for controlling motor-driven let-off motion for looms |
| US4529012A (en) * | 1983-02-16 | 1985-07-16 | Tsudakoma Corp. | Apparatus for controlling motor-driven let-off motion for looms |
| US4572243A (en) * | 1982-07-13 | 1986-02-25 | Zellweger Uster Ltd. | System and apparatus for the measurement of the tension of textile fabrics in textile machines |
| US4619294A (en) * | 1984-01-20 | 1986-10-28 | Tsudakoma Corp. | Method of and apparatus for controlling motor-driven let-off and take-up system for looms |
| US4628967A (en) * | 1984-08-24 | 1986-12-16 | Aktiengesellschaft Adolph Saurer | Cloth draw-off apparatus for a weaving machine |
| EP0208366A2 (en) * | 1985-07-12 | 1987-01-14 | Picanol N.V. | Process for regulation of the location of the so-called cloth line, breast beam, and breast beam drive used with it, in weaving machines |
| US4817677A (en) * | 1986-08-22 | 1989-04-04 | Picanol N.V. | Method for controlling the warp let-off and cloth take-up on weaving machines |
| US5025837A (en) * | 1989-02-25 | 1991-06-25 | Lindauer Dornier Gesellschaft Mbh | Apparatus for measuring loom warp tension |
| US5355912A (en) * | 1992-10-01 | 1994-10-18 | Nuovopignone-Industrie Meccaniche E Fonderia Spa | Elastic deformation device for automatically controlling the warp tension in a loom |
| US5386855A (en) * | 1992-10-23 | 1995-02-07 | Nuovopignone-Industrie Meccaniche E Fonderia Spa | Device for automatically varying the position of the shed vertex in a loom |
| US5628346A (en) * | 1994-02-18 | 1997-05-13 | Nuovo Pignone S.P.A. | Device for measuring the warp yarn tension in a loom by use of a deviation bar |
| US20110000576A1 (en) * | 2007-09-05 | 2011-01-06 | Toshiba Kikai Kabushiki Kaisha | Loom and drive device of loom |
| CN102251340A (en) * | 2010-05-21 | 2011-11-23 | 津田驹工业株式会社 | Let-off control method and let-off control device for loom including temple device having automatic temple position switching mechanism |
| CN102277677A (en) * | 2011-07-14 | 2011-12-14 | 西安工程大学 | Self-adaption let-off speed change and regulation device and speed regulation method thereof |
| US20160281278A1 (en) * | 2013-11-07 | 2016-09-29 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Method and Device for Measuring the Fabric Tension in a Weaving Machine |
| WO2022011320A1 (en) * | 2020-07-09 | 2022-01-13 | University Of Hawai'i | Continuous production of nanoforests |
| CN117328200A (en) * | 2023-11-30 | 2024-01-02 | 江苏友诚数控科技有限公司 | Air jet loom mechanism for panne |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH609386A5 (en) * | 1976-01-20 | 1979-02-28 | Rueti Ag Maschf | |
| JPS5410525U (en) * | 1977-06-24 | 1979-01-24 | ||
| JPS551329A (en) * | 1978-06-16 | 1980-01-08 | Nissan Motor | Weaving density controlling apparatus of loom |
| JPS5841271B2 (en) * | 1978-11-29 | 1983-09-10 | 宗一 鳥居 | Thread tension adjustment feeding device |
| JPS59157355A (en) * | 1983-02-28 | 1984-09-06 | 株式会社豊田自動織機製作所 | Start of operation of loom |
| CH661754A5 (en) * | 1983-10-04 | 1987-08-14 | Saurer Ag Adolph | CONTROL DEVICE FOR THE ROTARY DRIVE OF AN UNWINDING DEVICE. |
| JPS60181349A (en) * | 1984-02-24 | 1985-09-17 | 津田駒工業株式会社 | Wind-up control apparatus of loom |
| EP0717135B1 (en) * | 1994-12-13 | 2010-06-16 | ITEMA (Switzerland) Ltd. | Device for measuring warp tension on a loom |
| JPH0967739A (en) * | 1995-08-24 | 1997-03-11 | Urase:Kk | Warp feeding device |
| CN102493107A (en) * | 2011-12-13 | 2012-06-13 | 武汉纺织大学 | Method for weaving layered warps |
| CN112481775A (en) * | 2020-12-07 | 2021-03-12 | 中国科学院宁波材料技术与工程研究所 | Active let-off device and method of three-dimensional loom |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2597136A (en) * | 1947-02-21 | 1952-05-20 | Westinghouse Electric Corp | Electronic motor control |
| US3072154A (en) * | 1958-10-22 | 1963-01-08 | Zellweger Uster Ag | Method and device for electrically controlling the warp tension in looms for weaving |
| US3125127A (en) * | 1964-03-17 | Locher | ||
| US3308854A (en) * | 1963-01-22 | 1967-03-14 | Sulzer Ag | Loom for weaving |
| US3364403A (en) * | 1963-11-07 | 1968-01-16 | Jean Gusken Maschinenfabrik Ei | Motor control for maintaining the tension of positively pulled warp threads in warp looms |
| US3417791A (en) * | 1966-03-28 | 1968-12-24 | Saurer Ag Adolph | Warp beam take-off drive |
| US3706328A (en) * | 1969-09-05 | 1972-12-19 | Elitex Zavody Textilniho | Device for the continuous and automatically controlled driving of warp beams and similar devices bearing a yarn supply |
| US3753452A (en) * | 1971-04-22 | 1973-08-21 | United Merchants & Mfg | Potential-energy torque-generating mechanism for operating a take-up roll |
| US3828827A (en) * | 1972-07-31 | 1974-08-13 | Uniroyal Inc | Manufacture of woven wire tire cord fabric |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS148506B1 (en) * | 1970-04-28 | 1973-02-22 | ||
| FR2119285A5 (en) * | 1970-12-24 | 1972-08-04 | Fatex | |
| BE763488A (en) * | 1971-02-26 | 1971-07-16 | Picanol Nv | CHAIN REWASHER FOR LOOMS. |
| BE768521R (en) * | 1971-02-26 | 1971-11-03 | Weefautomaten Picanol N V Meti | CHAIN REMOVER FOR |
| FR2155852A1 (en) * | 1971-10-11 | 1973-05-25 | Inst Textile De France | Loom cylinder speed control system - uses electronically driven stepping motor |
-
1972
- 1972-09-29 CH CH1429472A patent/CH556416A/en not_active IP Right Cessation
- 1972-10-03 AT AT847072A patent/AT322467B/en not_active IP Right Cessation
- 1972-10-04 DE DE19722248558 patent/DE2248558A1/en active Pending
-
1973
- 1973-08-27 FR FR7330902A patent/FR2201361B1/fr not_active Expired
- 1973-09-25 SU SU1964991A patent/SU485604A3/en active
- 1973-09-25 CS CS6594A patent/CS175464B2/cs unknown
- 1973-09-27 IT IT29440/73A patent/IT995516B/en active
- 1973-09-27 US US401277A patent/US3878872A/en not_active Expired - Lifetime
- 1973-09-28 GB GB4548873A patent/GB1446573A/en not_active Expired
- 1973-09-28 JP JP48109181A patent/JPS5133222B2/ja not_active Expired
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3125127A (en) * | 1964-03-17 | Locher | ||
| US2597136A (en) * | 1947-02-21 | 1952-05-20 | Westinghouse Electric Corp | Electronic motor control |
| US3072154A (en) * | 1958-10-22 | 1963-01-08 | Zellweger Uster Ag | Method and device for electrically controlling the warp tension in looms for weaving |
| US3308854A (en) * | 1963-01-22 | 1967-03-14 | Sulzer Ag | Loom for weaving |
| US3364403A (en) * | 1963-11-07 | 1968-01-16 | Jean Gusken Maschinenfabrik Ei | Motor control for maintaining the tension of positively pulled warp threads in warp looms |
| US3417791A (en) * | 1966-03-28 | 1968-12-24 | Saurer Ag Adolph | Warp beam take-off drive |
| US3706328A (en) * | 1969-09-05 | 1972-12-19 | Elitex Zavody Textilniho | Device for the continuous and automatically controlled driving of warp beams and similar devices bearing a yarn supply |
| US3753452A (en) * | 1971-04-22 | 1973-08-21 | United Merchants & Mfg | Potential-energy torque-generating mechanism for operating a take-up roll |
| US3828827A (en) * | 1972-07-31 | 1974-08-13 | Uniroyal Inc | Manufacture of woven wire tire cord fabric |
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4129154A (en) * | 1975-08-08 | 1978-12-12 | Bennelli Dore D | Electronic device for controlling the winding off of material wound up on a core by tensiometric control |
| US4125131A (en) * | 1976-09-21 | 1978-11-14 | Adolph Saurer | Fixed driving connection between a guide roller and delivery roller of a loom |
| FR2365647A1 (en) * | 1976-09-27 | 1978-04-21 | Sulzer Ag | CONTROL DEVICE FOR UNWINDING THE CHAIN OF A WEAVING MACHINE |
| US4122873A (en) * | 1976-09-27 | 1978-10-31 | Sulzer Brothers Limited | Control means for controlling the warp let-off of a weaving machine |
| US4402347A (en) * | 1980-04-03 | 1983-09-06 | Vyzkumny A Vyvojovy Ustav Zavodu Vseobecneho Strojirenstvi | Warp let-off and its drive in a loom |
| US4572243A (en) * | 1982-07-13 | 1986-02-25 | Zellweger Uster Ltd. | System and apparatus for the measurement of the tension of textile fabrics in textile machines |
| US4529012A (en) * | 1983-02-16 | 1985-07-16 | Tsudakoma Corp. | Apparatus for controlling motor-driven let-off motion for looms |
| US4513790A (en) * | 1983-02-25 | 1985-04-30 | Tsudakoma Corp. | Method and apparatus for controlling motor-driven let-off motion for looms |
| US4619294A (en) * | 1984-01-20 | 1986-10-28 | Tsudakoma Corp. | Method of and apparatus for controlling motor-driven let-off and take-up system for looms |
| US4628967A (en) * | 1984-08-24 | 1986-12-16 | Aktiengesellschaft Adolph Saurer | Cloth draw-off apparatus for a weaving machine |
| EP0208366A2 (en) * | 1985-07-12 | 1987-01-14 | Picanol N.V. | Process for regulation of the location of the so-called cloth line, breast beam, and breast beam drive used with it, in weaving machines |
| EP0208366A3 (en) * | 1985-07-12 | 1989-02-08 | Picanol N.V. | Process for regulation of the location of the so-called cloth line, breast beam, and breast beam drive used with it, in weaving machines |
| US4817677A (en) * | 1986-08-22 | 1989-04-04 | Picanol N.V. | Method for controlling the warp let-off and cloth take-up on weaving machines |
| US5025837A (en) * | 1989-02-25 | 1991-06-25 | Lindauer Dornier Gesellschaft Mbh | Apparatus for measuring loom warp tension |
| US5355912A (en) * | 1992-10-01 | 1994-10-18 | Nuovopignone-Industrie Meccaniche E Fonderia Spa | Elastic deformation device for automatically controlling the warp tension in a loom |
| US5386855A (en) * | 1992-10-23 | 1995-02-07 | Nuovopignone-Industrie Meccaniche E Fonderia Spa | Device for automatically varying the position of the shed vertex in a loom |
| US5628346A (en) * | 1994-02-18 | 1997-05-13 | Nuovo Pignone S.P.A. | Device for measuring the warp yarn tension in a loom by use of a deviation bar |
| CN1041951C (en) * | 1994-02-18 | 1999-02-03 | 新齿轮股份公司 | Improved device for measuring the warp yarn tension in a loom |
| US8091589B2 (en) * | 2007-09-05 | 2012-01-10 | Toshiba Kikai Kabushiki Kaisha | Loom and drive device of loom |
| US20110000576A1 (en) * | 2007-09-05 | 2011-01-06 | Toshiba Kikai Kabushiki Kaisha | Loom and drive device of loom |
| CN102251340A (en) * | 2010-05-21 | 2011-11-23 | 津田驹工业株式会社 | Let-off control method and let-off control device for loom including temple device having automatic temple position switching mechanism |
| CN102251340B (en) * | 2010-05-21 | 2014-04-02 | 津田驹工业株式会社 | Let-off control method and let-off control device for loom including temple device having automatic temple position switching mechanism |
| CN102277677A (en) * | 2011-07-14 | 2011-12-14 | 西安工程大学 | Self-adaption let-off speed change and regulation device and speed regulation method thereof |
| US20160281278A1 (en) * | 2013-11-07 | 2016-09-29 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | Method and Device for Measuring the Fabric Tension in a Weaving Machine |
| US9725834B2 (en) * | 2013-11-07 | 2017-08-08 | Lindauer Dornier Gmbh | Method and device for measuring the fabric tension in a weaving machine |
| WO2022011320A1 (en) * | 2020-07-09 | 2022-01-13 | University Of Hawai'i | Continuous production of nanoforests |
| CN117328200A (en) * | 2023-11-30 | 2024-01-02 | 江苏友诚数控科技有限公司 | Air jet loom mechanism for panne |
| CN117328200B (en) * | 2023-11-30 | 2024-03-01 | 江苏友诚数控科技有限公司 | Air jet loom mechanism for panne |
Also Published As
| Publication number | Publication date |
|---|---|
| CS175464B2 (en) | 1977-05-31 |
| DE2248558A1 (en) | 1974-04-11 |
| IT995516B (en) | 1975-11-20 |
| SU485604A3 (en) | 1975-09-25 |
| AT322467B (en) | 1975-05-26 |
| JPS5133222B2 (en) | 1976-09-18 |
| JPS4971254A (en) | 1974-07-10 |
| FR2201361A1 (en) | 1974-04-26 |
| CH556416A (en) | 1974-11-29 |
| GB1446573A (en) | 1976-08-18 |
| FR2201361B1 (en) | 1977-05-13 |
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