GB2196351A - Method and apparatus for controlling a spinning machine - Google Patents
Method and apparatus for controlling a spinning machine Download PDFInfo
- Publication number
- GB2196351A GB2196351A GB08624715A GB8624715A GB2196351A GB 2196351 A GB2196351 A GB 2196351A GB 08624715 A GB08624715 A GB 08624715A GB 8624715 A GB8624715 A GB 8624715A GB 2196351 A GB2196351 A GB 2196351A
- Authority
- GB
- United Kingdom
- Prior art keywords
- yarn
- spindles
- controlling
- machine
- transmitter
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/32—Driving or stopping arrangements for complete machines
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/32—Counting, measuring, recording or registering devices
Abstract
The method of controlling a spinning machine resides in stabilizing the number of unthreaded or idle spindles by controlling the yarn delivery rate and stabilizing the mean yarn twist value by controlling the rotational speed of the machine (ie of the spindles). The apparatus for performing this method comprises a transmitter (1) of the number of unthreaded spindles, and a master generator (3), connected to the inputs of an add- subtract store (2) whose output is connected to a unit (4) controlling the drawing mechanism (6). The apparatus further comprises a transmitter (10) of the delivery rate of the drawing mechanism (6), and a transmitter (12) of the rotational speed of the spindles connected with a yarn twist value computation unit (11) whose output is connected to one line of an add-subtract counter (13) of which the other line is connected with a transmitter (14) of the specified yarn twist value, the output of the add-subtract counter (13) being connected with a unit (15) controlling the drive (17) of the machine. <IMAGE>
Description
SPECIFICATION
Method and apparatus for controlling a spinning machine
The present invention relates to the textile industry, and more particularly it relates to a method of controlling a spinning machine and to an apparatus capable of performing this method.
The field of the most effective application of the present invention is controlling the process of spinning flax fibres in ring-spinning machines.
Another field of beneficial application of the present invention is the control of twisting machines.
The present-day spinning process calls for direct participation of an attendant responsible for the operation indispensable from contunuation of the process, namely, that of eliminating yarn breakages. In practice, the process normally takes place with a certain equilibrium of the yarn breakage rate A and the intensity y of eliminating occurring yarn breakages. The choice of the equilibrium expressed as the ratio of 1 to ,u defines the technological and economic indicators of the process; however, this choice is complicated by the random character of both parameters and their instability in the course of time.
It is commonly realised that the yarn breakage rate A is prone to significant variations both in the course of time and in space (from one machine to another). This is caused by instability of the characteristics of the initial material, varying quality of processing the product being handled at previous stages of the technology and the condition of the equipment. On the other hand, the intensity of attending to the machine on the operator's part is likewise anything but stable, which is due, first and foremost, to different professional skill of the operators, growing fatigue during the work hours, as well as varying physical and psychological fitness.Thus, obviously undesirable consequences of instability of the ratio of the breakage rate to the intensity of elimination of occurring breakages are avoided by continuously adapting the speed duty of the operation of a spinning machine to the varying technological environment, as well as to the physical and psychological condition and skill of the operator. This function is trusted nowadays to automated systems of controlling the operating duty of a spinning machine, which monitor the actual throughput of the machine, the breakage rate and the intensity of the elimination of breakages by the operator in order to set up the speed duty of the machine ensuring the highest productivity under any given circumstances.
There are known methods and apparatus for automatic control of the operating duty of a ring-spinning machine, compensating for the instability of the breakage rate and of the intensity of elimination of yarn breakages, and thus providing for stepping up the productivity of both the labour and equipment.
Thus, there are known a method and an apparatus for controlling a spinning machine (see FR Patent No. 1,516,876; Int. Cl. G07C, 1986) providing for stability of the yarn breakage rate in a ring-spinning frame. The method resides in measuring the actual breakage rate, comparing it with a specified value, and altering the working speed of the machine when any discrepancy is detected between the measured and specified values. When the actual breakage rate exceeds the specified value, the machine is slowed down, and when the value measured is short of the specified value, the speed of the machine is increased.
There are further known a method and an apparatus for controlling a spinning machine (see SU Inventors' Certificate No. 438,734;
Int. Cl.2 DO1H 1/26, 1974) intended to maximize the throughput of the machine. The method includes monitoring the yarn delivery rate and the yarn winding factor, and computing from these values the output of the machine over the predetermined information gathering time. Then the output thus computed is compared with the output computed for the preceding information gathering period, and the yarn delivery rate of the machine is varied toward an increase in the output of the machine by an increment proportional to the discrepancy between the outputs over two successive information gathering periods.
The apparatus capable of performing this method comprises a transmitter of the number of unthreaded or idle spindles, an electronic control circuit, and a variable-speed drive controlling the yarn delivery rate. The electronic control circuit includes a summary or totalizing counter, a timer device and a comparison unit having an add counter, a subtract counter, and an add-subtract counter. The input of the summary counter is connected with the output of the transmitter of the number of unthreaded spindles, and the output thereof is connected with the timer device connected, in its turn, with the input of the add-subtract counter of the comparison unit whose output is connected with the variable-speed drive.
There is further known a method of controlling a spinning machine, including monitoring the number of idle or unthreaded spindles with the aid of a transmitter and varying the yarn delivery rate of the spinning machine as a function of the number of the unthreaded spindles.
The apparatus for performing this method comprises a counter of the number of unthreaded spindles having its output connected to a memory or store connected through a master oscillator with a timer and a delay circuit (see SU Inventors' Certificate No.
478,898; Int. C1.2 DO1H 1/26, 1974).
Among the drawbacks of this and previous technical solutions is the fact that when the yarn delivery rate is varied, the value of the twist of the yarn is likewise varied within a limited range of permissible twist variation amounting to 10-15 % of the nominal or rated twist. Consequently, when either the yarn breakage rate or the intensity of eliminating yarn breakage varies significantly, the apparatus reaches the ceiling of the permissible variation of the actual twist with respect to the specified twist value, and thus practically fails to control it properly. The dynamic control of the operating duty of the machine in this case either becomes manifestly inadequate, or ceases altogether.
The closest prior art of the present invention is a method of controlling a spinning machine, including measuring the current output and speed of the machine, computing the value of the speed of the machine corresponding to the maximum output, and using the value thus computed to set the speed of the machine.
The apparatus for performing this method comprises a transmitter of the yarn delivery rate and a transmitter of the number of live or threaded spindles, having their outputs connected to the inputs of a multiplication unit connected to an optimization unit connected, in its turn, with the variable-speed drive of the spinning machine (see SU Inventors' Certificate
No. 438,734; Int. Cl2. DO1H 126, 1975).
Among the shortcomings of these method and apparatus is the insufficient depth of control in any one of the proposed control channels (within 1 10% of the nominal or rated value), i.e. the yarn delivery rate control channel (governing the speed of the drawing mechanism) and the machine speed control channel (adapted to vary in synchronism the drawing mechanism speed and the rotational speed of the spindles, while maintaining the preset ratio of the two speeds). Therefore, if either the yarn breakage rate or the intensity of eliminating yarn breakages by the operator varies significantly, the control action reaches its ceilings, and any further control ceases until the disturbance dwindles to a value meriting control action within the attainable range. This limited depth of control affects the performance of the apparatus.The employment of the yarn delivery rate control as a control channel allows in some cases for supplementing the increased productivity of the equipment by solving another essential problem-that of upgrading the yarn quality. This is attainable by correlating the varying yarn breakage rate with an optimized value of the twist of the yarn. In other words, varying charactristics of the yarn causing a variation of the yarn breakage rate could be compensated for by a corresponding variation of the yarn twist as a function of the breakage rate.
Thus, in order to upgrade the yarn quality, it is expedient to provide a possibility of controlling dynamically the yarn delivery rate (associated with varying the yarn twist value) over the entire span of actually existing variations of the yarn breakage rate.
The object of the present invention is to create a method and an apparatus capable of performing this method, which should provide for controlling the yarn delivery rate so as to maintain a specified number of unthreaded or idle spindles, while controlling at the same time the speed of the machine so as to maintain the mean twist of the yarn at its nominal or specified value.
This object is attained in a method of controlling a spinning machine, including monitoring the number of unthreaded or idle spindles, comparing the actual number of the unthreaded spindles with the specified value, obtaining a sign and signal of discrepancy between the specified and actual values and varying the yarn delivery rate of the spinning machine as a function of this discrepancy, which method, in accordance with the present invention, also includes continuously measuring in the course of the spinning process the yarn delivery rate and the rotational speed of the spindles, computing from the values thus mea -sured the mean twist of the yarn, comparing this mean twist value with the specified yarn twist value, and upon the error thus obtained exceeding a predetermined permissible level, varying the speed of the machine toward reducing this error to zero.
An apparatus for performing the method of controlling a spinning machine comprises a control unit of the drawing mechanism, having its respective inputs connected to the outputs of stores and its outputs connected to the inputs of a master generator, of a transmitter of the number of unthreaded spindles, of an error-minimizing generator, of a timer and, through actuating means, with the drawing mechanism, the outputs of the unthreaded spindles number transmitter and of the master generator being connected to the inputs of the first add-subtract store, the first output of the error-minimizing generator being connected with the first output of the timer and with the input of the other store, which apparatus, in accordance with the present invention, further comprises a transmitter of the rotational speed of the spindles, a master control of the specified twist value, a divider, a time store, and a series connection of a transmitter of the delivery rate of the drawing mechanism, a twist value computation unit, an add-subtract store of the twist error and a machine speed control unit, the rated twist value master control being connected to the master input of the add-subtract store of the twist error, the spindle rotational speed transmitter being connected with an additional input of the twist value computation unit, the other outputs of the error-minimizing generator and of the timer being connected to the inputs of the divider whose output is connected through the time store with the correction input of the machine speed control unit.
A major advantage of the present invention is the fact that the number of unthreaded or idle spindles is stabilized along the yarn delivery rate control channel, whereas the mean yarn twist value is stabilised along the channel of controlling the speed of the machine, which means that throughout any variation of the yarn breakage rate a dynamic control of the yarn twist value is provided for allowing for enhancing the physical and mechanical properties of the yarn, for upgrading the yarn and for bringing down the yarn breakage rate at successive yarn-handling stages.
The herein disclosed method allows, by offering an additional channel of controlling the machine speed, for enhancing the effectiveness of the system, as a whole, and for broadening the control range.
The first control channel governing the yarn delivery rate optimizes the speed duty of the machine as a function of the yarn breakage rate and the intensity of eliminating yarn breakages.
The second control channel governing the speed of the machine stabilizes the mean yarn twist value, i.e. the machine speed is varied so that the mean value of the actual number of unthreaded spindles should correspond to the mean twist value equalling the specified twist value. This allows for dynamic control of the yarn delivery rate at practically any real-life extent of variation of the yarn breakage rate, avoiding situations when this control action reaches its ceiling or threshold levels, which provides for stabilizing the physical and mechanical properties of the yarn, with the weak portions of the yarn particularly prone to breakage being uptwisted and the portions of excessive strength being slightly downtwisted.
This brings down the non-uniformity of the tensile strength of the yarn, while stepping up the mean value of its tensile strength.
Other objects and advantages of the present invention will be made apparent in the following detailed description of its embodiment and the accompanying drawing presenting a block unit diagram of an apparatus capable of performing the method in accordance with the invention.
The method of controlling a spinning machine includes monitoring the number of unthreaded or idle spindles, comparing the actual number of the unthreaded spindles with the specified value, obtaining a-sign and signal of discrepancy between the specified and actual values and varying the yarn delivery rate of the spinning machine as a function of this discrepancy. In the course of the spinning process the yarn delivery rate and the speeds of the machine are continuously measured, the mean twist of the yarn is computed from the values thus measured and compared with the specified yarn twist value to determine whether or not the detected error (the discrepancy between the actual and specified twist values) exceeds a predetermined level, and the speed of the machine is varied toward reducing this error to zero.
The apparatus for controlling a spinning machine comprises a transmitter 1 of the number of unthreaded or idle spindles, an add-subtract store 2, a master generator 3, a control unit 4, actuating means 5, a drawing mechanism 6, an error-minimizing generator 7, a timer 8, a store 9, a transmitter 10 of the yarn delivery rate, a yarn twist value computation unit 11, a transmitter 12 of the rotational speed of the spindles, an add-subtract store 13 of the twist value error, a specified twist value master control 14, a machine speed control unit 15, a unit 16 controlling the drive 17 of the machine, a time store 18, and a divider 19.
The unthreaded spindle number transmitter 1 is connected to the input of the add-substract store 2 having connected to its other input the master generator 3 whose pulse repetition rate corresponds to the specified number of unthreaded or idle spindles. The output of the add-subtract store 2 is connected to the unit 4 controlling the speed of the drawing mechanism capable of varying through the actuating means 5 the operating speed of the drawing mechanism 6. The control unit 4 is also connected to the generator 7, timer 8 and store 9. The yarn delivery rate is responded to by the transmitter 10 whose output is connected to the input of the yarn twist value computation unit 11 having its outer input connected to the transmitter 12 of the rotational speed of the spindles.The output of the unit 11 is fed to the add-subtract store 13 whose other input is connected to the specified twist value transmitter 14 and whose output is connected with the machine speed control unit 15 controlling through the unit 16 the drive 17 of the spinning machine. The other input of the machine speed control unit is connected with the store 18 connected, in its turn, through the divider 19 to the generator 7 and to the timer 8.
The apparatus capable of performing the disclosed method operates, as follows.
The unthreaded spindle number transmitter 1 feeds to the add line of the add-subtract store 2 a sequence of pulses corresponding to the idling time of the unthreaded spindles.
The master generator 3 sends to the subtract line of the add-subtract store 2 pulse trains whose repetition rate corresponds to the specified idling time of the spindles. When the repetition rates of the pulses coming from the master generator 3 and from the transmitter 1 of the number of unthreaded spindles differ, the add-subtract store 2 stores the error representing the discrepancy between the specified and actual idling time of the spindle.
When the working zone of the store 2 is filled, the latter sends a signal to the control unit 4 which sends a inhibiting signal to the unthreaded spindle transmitter 1 and to the master generator 3, and at the same time the add-subtract store 2 is reset to zero. According to the sign of the error signal, the actuating means 5 varies the speed of the drawing mechanism 6.
The error-minimizing degree is determined by the time of storing the error. During the data-gathering period, pulses from the timer 8 are received by the store 9. The longer the data-gathering period, the greater volume of the store 9 is filled. As the actuating means 5 is activated, the generator 7 starts sending pulses to the store 9. The degree of the variation of the delivery rate of the drawing mechanism 6 is defined by the number of the unfilled digits of the store 9. As the store 9 is filled, the error-minimizing action is terminated, with the store 9 sending an appropriate signal to the unit 4 controlling the speed of the drawing mechanism 6 to terminate the errorminimizing action and to send activating signals to the unthreaded spindle transmitter 1 and to the master generator 3. The new datagathering period is thus commenced.
At the same time, the yarn delivery rate and the speed of the drive 17 of the machine are monitored, respectively, by the transmitters 10 and 12. The mean yarn twist value is computed in the twist value computation unit 11 by dividing the correspondingly expressed yarn delivery rate by the speed of the machine (i.e. the rotational speed of the spindles), and sent in a discrete form to one input of the add-subtract store 13 whose other input receives signals from the specified twist value transmitter 14. In its initial state, the working zone of the add-subtract store 13 is filled by one half. In operation, upon receiving an error signal representing a discrepancy between the specified and actual twist values, the value stored in the store 13 varies in the corresponding direction.When the threshold of the working zone is thus reached in the store 13, the latter sends a signal to the machine speed control unit 1 5 which operates the unit 16 to vary the speed of the drive 1 7 of the spinning machine (i.e. to vary the rotational speed of the spindles). The error-correction degree is dependent once again on the error storing time. Throughout the data-gathering period the timer 8 sends pulses through the divider 19 to the store 18. As the error-correcting action is commenced, pulses start coming to the store 18 from the- generator 7, and the errorcorrecting action is continued until the store 18 is filled completely, whereafter the latter sends a signal to the control unit 15 to terminate the error-correcting action and to commence a new date-gathering period.
It can be seen that a major advantage of the invention is the twist value being controlled over the full range irrespectively of the level of fluctuation of the yarn breakage rate and of the intensity of eliminating yarn breakages, thus yielding an enhanced yarn quality, a significantly extended control range and a situation where at any given moment an optimized ratio of the yarn delivery rate to the machine speed is selected to obtain the predetermined winding factor, which allows for substantially stepping up the labour and equipment productivity.
Claims (4)
1. A method of controlling a spinning machine, including monitoring the number of unthreaded spindles, comparing the actual number of unthreaded spindles with the specified number, obtaining a sign and signal of discrepancy between the specified and actual numbers and varying the yarn delivery rate of the spinning machine as a function of this discrepancy, continuously measuring in the course of the spinning process the yarn delivery rate and the speed of the machine, computing from the values thus measured the mean twist of the yarn, comparing this mean yarn twist value with the specified yarn twist value, and upon the error thus obtained exceeding a predetermined permissible level, and varying the speed of the machine toward reducing this error to zero.
2. An apparatus for performing a method of controlling a spinning machine as claimed in
Claim 1, comprising a control unit of the drawing mechanism, having its respective inputs connected with the outputs of the first and second stores, and its outputs connected with the respective inputs of a master generator, of a transmitter of the number of unthreaded spindles, of an error-minimizing generator, of a timer and, through actuating means, with the drawing mechanism, the outputs of the transmitter of the number of unthreaded spindles and of the master generator being connected to the respective inputs of the first add-subtract store, the first output of the error-minimizing generator being connected to the first output of the timer and to the input of the second store; a transmitter of the rotational speed of the spindles, a master control of the specified yarn twist value, a divider, a time store and a series connection of a transmitter of the delivery rate of the drawing mechanism, a yarn twist value computation unit, a third add-subtract store of the twist error and a unit controlling the drive of the machine, the master control of the specified yarn twist value being connected to the master input of the third add-subtract store of the twist error, the transmitter of the rotational speed of the spindles being connected with an additional input of the yarn twist value computation unit, the other outputs of the error-minimizing generator and of the timer being connected to the respective inputs of the divider having its output connected through the time store with the correction input of the unit controlling the drive of the machine.
3. A method of controlling a spinning machine as claimed in Claim 1, substantially as hereintofore described and illustrated in the appended drawing.
4. An apparatus for performing a method of controlling a spinning machine, as claimed in Claim 2, substantially as hereintofore described with reference to the appended drawing.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8624715A GB2196351B (en) | 1986-10-15 | 1986-10-15 | Method and apparatus for controlling a spinning machine |
| DE19863636288 DE3636288A1 (en) | 1986-10-15 | 1986-10-24 | METHOD AND ARRANGEMENT FOR CONTROLLING A SPINNING MACHINE |
| FR8614913A FR2605648B1 (en) | 1986-10-15 | 1986-10-27 | METHOD FOR CONTROLLING A SPINNING MACHINE AND DEVICE FOR CARRYING OUT SAID METHOD |
| NL8602742A NL8602742A (en) | 1986-10-15 | 1986-10-31 | METHOD AND APPARATUS FOR CONTROLLING A SPINNING MACHINE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8624715A GB2196351B (en) | 1986-10-15 | 1986-10-15 | Method and apparatus for controlling a spinning machine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8624715D0 GB8624715D0 (en) | 1986-11-19 |
| GB2196351A true GB2196351A (en) | 1988-04-27 |
| GB2196351B GB2196351B (en) | 1990-07-25 |
Family
ID=10605786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8624715A Expired - Fee Related GB2196351B (en) | 1986-10-15 | 1986-10-15 | Method and apparatus for controlling a spinning machine |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE3636288A1 (en) |
| FR (1) | FR2605648B1 (en) |
| GB (1) | GB2196351B (en) |
| NL (1) | NL8602742A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001040557A1 (en) * | 1999-12-03 | 2001-06-07 | Jordi Galan I Llongueras | Independent torsioning unit |
| WO2008142181A1 (en) * | 2007-05-18 | 2008-11-27 | Twistechnology, S.L. | New thread twist system for twisting and spinning machines |
| CN112095188A (en) * | 2019-06-18 | 2020-12-18 | 卓郎纺织解决方案两合股份有限公司 | Optimization of operation of spinning machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3921988A1 (en) * | 1989-07-04 | 1991-01-17 | Rieter Ag Maschf | Spindle drive control - compensates for slip through timed measurements to correct nominal value in force |
| DE4402582C2 (en) * | 1994-01-28 | 1997-12-04 | Zinser Textilmaschinen Gmbh | Method and device for optimizing the spinning geometry of a ring spinning machine |
| CN114775122B (en) * | 2022-04-28 | 2023-04-18 | 无锡物联网创新中心有限公司 | Method for estimating complete machine twist and single spindle twist of spinning frame and related device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE701474C (en) * | 1939-02-01 | 1941-01-17 | Karl Goehring Dipl Ing | Device for compressing materials in a liquid state |
| FR1516876A (en) * | 1966-12-21 | 1968-02-05 | Improvement with adjustable interior hinges | |
| SU438734A1 (en) * | 1972-05-26 | 1974-08-05 | Центральный научно-исследовательский институт промышленности лубяных волокон | Duty Regulator |
| CS166934B1 (en) * | 1972-09-15 | 1976-03-29 | ||
| CS166935B1 (en) * | 1972-09-15 | 1976-03-29 | ||
| CH555422A (en) * | 1973-02-20 | 1974-10-31 | Heberlein Hispano Sa | METHOD AND DEVICE FOR CONTROLLING SPINNING MACHINES. |
| DE2334389A1 (en) * | 1973-07-06 | 1975-01-23 | Leuze Electronic Kg | ARRANGEMENT ON PROCESSING MACHINES OF FAEDS AND FIBERS TO INFLUENCE THE DELIVERY SPEED |
| SU478898A1 (en) * | 1974-01-30 | 1975-07-30 | Центральный научно-исследовательский институт промышленности лубяных волокон | Duty Regulator |
| DE2508113A1 (en) * | 1974-02-28 | 1975-10-09 | Bekescsabai Koetoettarugyar | Optimizing adaptive control system - for textile machines readjusts optimum production speed regularly to suit changes of system parameters |
| DE2454721C2 (en) * | 1974-11-19 | 1986-10-23 | Zinser Textilmaschinen Gmbh, 7333 Ebersbach | Method and device for operating a preparation trolley |
| DE3606466A1 (en) * | 1985-03-22 | 1986-09-25 | Fritz 7347 Bad Überkingen Stahlecker | Method for operating an open-end friction spinning machine |
| DE3624212A1 (en) * | 1986-07-16 | 1988-01-28 | Tsnii Promy Lubyanykh Volokon | METHOD AND ARRANGEMENT FOR CONTROLLING A SPINNING MACHINE |
-
1986
- 1986-10-15 GB GB8624715A patent/GB2196351B/en not_active Expired - Fee Related
- 1986-10-24 DE DE19863636288 patent/DE3636288A1/en active Granted
- 1986-10-27 FR FR8614913A patent/FR2605648B1/en not_active Expired
- 1986-10-31 NL NL8602742A patent/NL8602742A/en not_active Application Discontinuation
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001040557A1 (en) * | 1999-12-03 | 2001-06-07 | Jordi Galan I Llongueras | Independent torsioning unit |
| ES2168924A1 (en) * | 1999-12-03 | 2002-06-16 | I Llongueras Jordi Galan | Independent torsioning unit |
| WO2008142181A1 (en) * | 2007-05-18 | 2008-11-27 | Twistechnology, S.L. | New thread twist system for twisting and spinning machines |
| ES2316282A1 (en) * | 2007-05-18 | 2009-04-01 | Twistechnology S.L. | New thread twist system for twisting and spinning machines |
| US8079207B2 (en) | 2007-05-18 | 2011-12-20 | Frimal Trading S.L. | Thread twist system for twisting and spinning machines |
| CN112095188A (en) * | 2019-06-18 | 2020-12-18 | 卓郎纺织解决方案两合股份有限公司 | Optimization of operation of spinning machine |
| EP3760772A1 (en) * | 2019-06-18 | 2021-01-06 | Saurer Spinning Solutions GmbH & Co. KG | Optimization of the operation of a spinning machine |
| US11643757B2 (en) | 2019-06-18 | 2023-05-09 | Saurer Spinning Solutions Gmbh & Co. Kg | Optimization of the operation of a spinning machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3636288A1 (en) | 1988-04-28 |
| FR2605648B1 (en) | 1989-06-30 |
| FR2605648A1 (en) | 1988-04-29 |
| NL8602742A (en) | 1988-05-16 |
| GB8624715D0 (en) | 1986-11-19 |
| GB2196351B (en) | 1990-07-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921015 |