US20030019970A1 - Winding machine - Google Patents
Winding machine Download PDFInfo
- Publication number
- US20030019970A1 US20030019970A1 US09/954,875 US95487501A US2003019970A1 US 20030019970 A1 US20030019970 A1 US 20030019970A1 US 95487501 A US95487501 A US 95487501A US 2003019970 A1 US2003019970 A1 US 2003019970A1
- Authority
- US
- United States
- Prior art keywords
- bending bar
- winding machine
- designed
- winding
- tubular housing
- 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.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/40—Applications of tension indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2553/00—Sensing or detecting means
- B65H2553/20—Sensing or detecting means using electric elements
- B65H2553/21—Variable resistances, e.g. rheostats, potentiometers or strain gauges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention generally relates to a winding machine for winding up bobbin material arriving from a feeding apparatus.
- the winding machine includes a winding spindle being designed and arranged to be rotated by a drive and a unit for determining a signal which is proportional to the tension of the bobbin material.
- the feeding apparatus which delivers the material to be wound up is not a structural component of the winding machine, but it is arranged in the end portion of a producing apparatus, for example a spinning apparatus, a finishing apparatus or the like being located upstream of the winding machine.
- a producing apparatus for example a spinning apparatus, a finishing apparatus or the like being located upstream of the winding machine.
- the bobbin material may be sensitive material as, for example, yarn or tape.
- the bobbin material may be made of carbon fibers or glass fibers which are sensitive with respect to bending or friction.
- a plurality of changes concerning the direction of movement of the bobbin material and great angles of the bobbin being surrounded by the bobbin material at small radiuses may harm the bobbin material to an unacceptable extent.
- Such changing bending loads of the bobbin material are typical of known dancer arm arrangements in known winding machines.
- a winding machine is known from German Patent No. 37 23 593 C1.
- the known winding machine includes a winding spindle which is driven by a controllable drive.
- a bobbin is located on the winding spindle, the bobbin carrying the bobbin material to be wound up by the machine.
- the bobbin material is put on the bobbin in a traversing manner by a traversing apparatus or a different yarn guiding apparatus.
- a dancer device is arranged upstream of the traversing apparatus, the dancer device determining a signal which is proportional to the tension prevailing in the bobbin material (in other words: the tractive force subjecting the material). The signal is used to control the drive of the winding spindle.
- the known dancer arm arrangement further includes two stationary deflection rollers between which the dancer arm is arranged.
- the bobbin material surrounds the three rollers in a way of a lifting block assembly.
- a change of the tension of the yarn effects a movement of the dancer arm.
- the movement of the dancer arm is determined with respect to its value and its direction.
- the signal is used as the manipulated variable in the control loop for the control of the drive of the winding spindle.
- the engine of the drive is influenced in a way that the tension in the bobbin material returns to its former value.
- the tension in the bobbin material is produced by the dancer arm.
- the dancer arm is subjected by the force of a spring and/or by a weight.
- the tension produced in the bobbin material in this way has to be compensated by the engine of the drive of the winding spindle during the winding process.
- the torque being transmitted to the winding spindle by the engine of the drive does not depend from the control tension of the motor and from the number of rotations corresponding to the motor diagram.
- a torque control is used in the known machine.
- the number of rotations of the winding spindle is independent from the velocity of the arriving bobbin material and from the diameter of the material being wound up on the winding spindle.
- a winding machine for yarn arriving at constant velocity is known from European Patent No. 0 712 374 B1.
- the known winding machine includes a traversing apparatus for moving the yarn back and forth in a direction transverse to its main direction of movement.
- the known machine includes a winding spindle being driven by a motor.
- a dancer arm device includes two stationary deflection rollers and a deflection roller being located on the dancer arm.
- the dancer arm device is used to determine a signal which is proportional to the tension in the bobbin material.
- the bobbin material has to contact and surround a plurality of deflection rollers at least at partially substantial surrounding angles. Consequently, the bobbin material is subjected to substantial bending loads and also to changing bending loads in combination with respective friction forces. Especially in case of sensitive bobbin material being used, the bobbin material may be harmed or even destroyed.
- An apparatus for measuring the tension of moving yarn is known from German Patent No. 29 05 713 C2.
- the known apparatus includes fixed yarn guiding devices which ensure a straight movement of the yarn.
- the yarn passes a feeding apparatus, a first stationary head yarn guide, other prearranged units, a second stationary yarn guide, a traversing apparatus and, finally, a winding spindle on which the yarn is being wound up.
- a force transmitting device and a yarn excursion device is associated with the two fixed guiding devices.
- the force transmitting device includes a contact surface for the yarn which gets in frictional contact with the yarn to deflect an arm in response to the yarn excursion device.
- the tension of the yarn at maximum excursion and in the zero crossing of the traversing apparatus is measured by an extensometer strip device.
- the known unit for determining the tension in the bobbin material includes at least two stationary guiding devices. The bobbin material is subjected to substantial friction several times which has negative effects in case of sensitive bobbin material being used.
- the present invention relates to a winding machine for winding up bobbin material arriving from a feeding apparatus.
- the winding machine includes a winding spindle being designed and arranged to be rotated by a drive.
- a unit serves to determine a signal which is approximately proportional to the tension of the bobbin material.
- the unit includes an arm being designed and arranged to be movable to a limited extent and only one roller being arranged at the arm. The only one roller is designed and arranged to guide the bobbin material to contact the feeding apparatus and the roller without contacting other elements in between.
- the present invention also relates to a winding machine for winding up bobbin material arriving from a plurality of feeding apparatuses.
- the winding machine includes a plurality of winding spindles each being designed and arranged to be rotated by a drive.
- a plurality of traversing apparatuses each are designed and arranged to cooperate with one of the winding spindles to wind up the bobbin material.
- a plurality of units each serves to determine a signal which is approximately proportional to the tension of the bobbin material.
- Each of the units includes an arm being designed and arranged to be movable to a limited extent and only one roller being arranged at the arm. The only one roller is designed and arranged to guide the bobbin material to contact the respective feeding apparatus and the respective roller without contacting other elements in between.
- the novel winding machine or winding apparatus includes only one roller instead of three deflection rollers as known in the prior art.
- this one single roller With this one single roller, the tension in the bobbin material is determined by the movement of the roller. In this way, a signal is produced which has an influence on the engine of the drive driving the winding spindle by the control unit.
- This one single roller is supported on a movable arm or a bar. Especially, the arm is supported to be pivotable or bendable. The movement of the arm is limited to a small range which is substantially less than the one during the movement of a dancer arm as know in the prior art. The one single roller will still be surrounded by the bobbin material.
- the two stationary deflection rollers known in the prior art are not needed in the novel winding machine. Their functions are fulfilled by different elements.
- the one single roller is arranged adjacent to the end of the feeding apparatus and the traversing apparatus. This means that no further deflection rollers are located between these two aforementioned elements.
- the tension in the bobbin material is produced between the two deflection rollers.
- the tension in the bobbin material is produced between the one single roller and the winding spindle.
- the tension in the bobbin material is no longer produced by a dancer arm, but by the drive of the winding spindle.
- the engine or the motor of the drive of the winding spindle does not only compensate changes concerning the tension in the bobbin material, but it determines the tension in the bobbin material.
- the bobbin material moves on from the one single roller directly into the traversing apparatus. In this way, the traversing triangle is advantageously increased.
- the unit or the device for determining a signal which is approximately proportional to the tension in the bobbin material only needs to include a comparatively small number of components, it is compact and it may be produced at low costs. Without having to use additional mechanical components, as for example deflection rollers, it is possible to produce different characteristics of tension curves during a winding travel.
- the reason for this effect is the fact that the tension of the yarn or of a different bobbin material is only produced by the motor of the drive of the winding spindle.
- reducing, increasing or constant tension values may be used in the form of software tables. These values may be easily and reproducibly used.
- the movement of the one single roller being arranged at the free end of the arm preferably has a value of less than approximately 1 mm. Preferably, the value may only be approximately a few ⁇ fraction (1/10) ⁇ mm. Consequently, the surrounding angle of the bobbin material at the one single roller does not substantially change, and the geometry of the arriving bobbin material remains substantially constant during the entire winding travel.
- the arm may include a bending bar and the unit may include at least one sensor for sensing deflection of the bending bar.
- the arm may also be directly designed as a bending bar in a way that the arm is only supported at one side and the bending forces are applied by the bobbin material moving over the one single roller.
- the arm only functions as a lever arm and that it is operatively connected to a bending bar which is bent by the lever arm. In this way, it is possible to intentionally enlarge the lever arm in case of respective structural conditions.
- the bending bar includes a sensor for sensing the deflection. The sensor may be directly arranged on the bending bar, or it may be operatively connected to the bending bar.
- the senor may include extensometer strips. However, force sensors, way sensors and the like may also be used.
- the respective sensor may include an electronic unit with which the deflection is transformed to an electric signal, especially to an electric potential. The combination of the sensor and the electronic unit for evaluation purposes allows for a small, compact design.
- the arm may also be designed and arranged as a scale beam, and the unit may include at least one sensor for sensing the force of the bobbin material which subjects the one roller.
- the scale beam may also be designed as a control lever. It has a substantially stiff design, and it is supported approximately in its middle portion or outside its middle portion to transmit the force being applied onto the one single roller by the bobbin material to the sensor.
- the sensor may include extensometer strips, force sensors or the like.
- the preferred embodiment of the arm is the one with a bending bar including extensometer strips. It is possible without problems to fix the bending bar at its one end at the supporting structure of the winding machine, to arrange the extensometer strips approximately in the middle portion of the arm and to arrange the one roller at the free end of the arm. It makes sense to arrange the extensometer strips on the bending bar in association with the bending plane of the bending bar.
- the bending bar may have a nominal bending portion, and the extensometer strips may be arranged in the nominal bending portion.
- a nominal or desired bending portion may be designed as a weakened portion of the bending bar to improve elastic bending deformation at the place where the extensometer strips are arranged.
- the bending bar has a cylindrical design.
- the nominal bending portion may include flattened, plain surfaces on which the extensometer strips may be easily and effectively placed.
- the unit may further include a tubular housing including a plurality of adjustable stops, and the bending bar may be arranged in the tubular housing.
- the stops may be designed and arranged to limit deflection or movement of the bending bar in the tubular housing.
- the adjustable stops may be designed as adjustable screws.
- the tubular housing also serves to protect the bending bar, the sensors and the electronic unit.
- the winding machine includes a plurality of winding heads each including a winding spindle and a traversing apparatus
- the units each including one single roller and together being arranged at a separate machine unit may be arranged at a comparatively great distance with respect to the traversing apparatus of each winding head such that the traversing triangle gets especially long and the variations concerning tension in the bobbin material resulting from the winding process are reduced.
- FIG. 1 is a schematic side view of the novel winding machine.
- FIG. 2 is a sectional view through the sensor according to line II-II of FIG. 1.
- FIG. 3 is a similar view as FIG. 1, but it illustrates a novel winding machine including five winding spindles.
- FIG. 4 is a similar view as FIG. 2, but it illustrates a sensor including a scale beam.
- FIG. 1 illustrates a novel winding machine 1 including a supporting structure 2 carrying a front plate 3 .
- a winding spindle 4 is rotatably supported in the front plate 3 .
- the winding spindle 4 extends through the front plate 2 , and it freely ends towards the outside.
- the winding spindle 4 is driven by a drive including an engine.
- the drive is not illustrated to simplify understanding of the drawing.
- the drive may a conventional one as it is used in the field of winding machines.
- the winding spindle 4 is supported by a bearing 5 to be pivotable to a certain limited extend.
- An elongated hole 6 is located in the front plate 3 to allow for the pivotal movement.
- a bobbin 7 is put on the winding spindle 4 .
- the bobbin material 8 is wound up on the bobbin 7 .
- the bobbin material 8 may be yarn or tape.
- the continuous lines illustrate the beginning of the winding process, meaning the beginning of the winding travel of the material with respect to the bobbin 7 and to the spindle 4 , respectively.
- the position of the winding spindle 4 including the wound up bobbin material 8 at the end of the winding travel is illustrated by the broken line with two dots.
- a rotatable contact roller 9 is supported in a region of the front plate 3 in association with the winding spindle 4 .
- the rotatable contact roller 9 is stationary.
- the bobbin 7 being detachably located on the winding spindle 4 contacts the circumference of the contact roller 9 .
- the surface of the wound up material of the bobbin material 8 contacts the contact roller 9 .
- a traversing apparatus 10 is associated with the contact roller 9 and with the winding spindle 4 . With the traversing apparatus 10 , the bobbin material 8 is placed on the circumference of the bobbin 7 and on the already wound up bobbin material 8 , respectively, over the length of the bobbin 7 .
- the function of the traversing apparatus 10 is well known by a person with skill in the art.
- the bobbin material 8 is fed to the winding machine 1 by a feeding apparatus 11 .
- the feeding apparatus 11 is not a component of the winding machine 1 . Instead, it is located at the end of a producing unit for the bobbin material 8 with which the bobbin material 8 is continuously fed to the winding machine 1 .
- the feeding apparatus 11 it is also possible to arrange the feeding apparatus 11 in the region of the winding machine 1 .
- the feeding apparatus 11 includes two rollers which guide the bobbin material 8 and with which the bobbin material 8 is guided without having to change its direction of movement.
- a unit 14 for determining a signal which is proportional to the tension of the bobbin material 8 is arranged at a separate machine unit 13 being supported on the supporting structure 2 .
- the tension of the bobbin material or the tension prevailing in the bobbin material is to be understood as the tension resulting from pulling forces subjecting the material.
- the unit 14 serves to control the drive of the winding spindle 4 .
- the unit 14 includes an arm 15 having the design of a cylinder-like axle.
- the arm 15 at its one end facing the machine unit 13 is fixedly connected, and at its freely protruding end, it carries a roller 16 over which the bobbin material 8 is guided.
- the arm 15 may also be called a cantilever arm.
- the roller 16 is the only roller and the only place at which the moving direction of the bobbin material 8 changes between the feeding apparatus 11 and the traversing apparatus 10 .
- the arm 15 with the roller 16 is arranged with respect to the feeding apparatus 11 and the traversing apparatus 10 such that the bobbin material 8 surrounds the roller 16 at a respective surrounding angle.
- the roller 16 at the arm 15 is supported to be freely rotatable to sensitively change the direction of movement of the bobbin material 8 .
- the bobbin material 8 is subjected to a bending load.
- the diameter of the roller 16 may be chosen to be comparatively great to further reduce the bending load.
- the bobbin material 8 deflects the arm 15 with the roller 16 being located thereon in the direction of arrow 17 .
- the direction of the arrow 17 is the bisecting between the bobbin material 8 arriving at the roller 16 and leaving the roller 16 .
- the novel unit 14 with the roller 16 replaces dancer arm arrangements known in the prior art which include two stationary deflecting rollers and one movable roller being located on the dancer arm. It is to be seen from FIG. 1 that the novel winding apparatus 1 does not include the two deflecting rollers as known from the prior art, and that the bobbin material 8 stays free from alternate bending forces.
- the arrangement of the novel unit 14 on a separate machine unit 13 allows for the possibility of choosing the distance between the traversing apparatus 10 and the unit 14 desirably great to attain a great traversing triangle. However, it is also possible to arrange the unit 14 in a different region of the supporting structure 2 .
- the unit 14 for determining a signal which is approximately proportional to the tension in the bobbin material 8 to control the drive of the winding spindle 4 works different than known prior art devices.
- the tension in the bobbin material 8 is produced by the dancer arm being subjected by springs, weights or the like, and the engine of the drive of the winding spindle only compensates variations of the tension.
- the application of the tension in the bobbin material is exclusively produced by the engine of the drive of the winding spindle 4 .
- the only roller 16 of the novel winding machine 1 also fulfils the functions of the two deflection rollers of prior art devices.
- the tension in the bobbin material is produced between the two deflection rollers.
- the tension in the bobbin material 8 is produced between the winding spindle 4 and the roller 16 .
- the traversing triangle is located between the last deflection roller being located upstream of the traversing apparatus and the dancer arm arrangement and the traversing apparatus.
- the traversing triangle is located between the only one roller 16 and the traversing apparatus 10 .
- FIG. 2 illustrates a section according to line II-II in FIG. 1 taking into account the direction of the arrow 17 .
- FIG. 2 shows the novel unit 14 in greater detail.
- the unit 14 includes the cylinder-like arm 15 in the form of a cantilever.
- the arm 15 has the form of a bending bar 18 .
- the bending bar or beam 18 at its one end 19 is supported in a tubular housing 20 .
- the tubular housing 20 is supported at the machine unit 13 .
- the one end 20 of the bending bar 18 is fixedly supported in a way that the other end 21 of the bending bar 18 freely protrudes or cantilevers.
- the roller 16 in the region of this end 21 is supported to be freely rotatable.
- the bending bar 18 in its middle portion includes a desired bending portion 22 .
- the desired or nominal bending portion 22 is formed by flattened portions and by tapered portions of the bending bar 18 .
- the bending bar 18 includes a plate-like portion 23 having plane surfaces on which, for example, extensometer strips 24 are located.
- the extensometer strips 24 form part of a sensor 25 for determining the deflection of the bending bar 18 in response to the tension in the bobbin material 8 .
- An electronic unit 26 is located in the region of the end 19 of the bending bar 18 , or at least inside the tubular housing 20 .
- the electric signal corresponding to the deflection of the bending bar 18 is sent to the control unit (not shown) for the drive of the winding spindle 4 by the electronic unit 26 and a cable 27 .
- the tubular housing 20 includes adjustable stops 28 to limit the maximum deflection of the bending bar 18 in the direction of the arrow 17 .
- the adjustable stops 28 may be designed as adjustment screws.
- a seal 29 is located in the front end portion of the tubular housing 20 . The seal 29 prevents dust and impurities from entering the interior of the tubular housing 20 .
- FIG. 3 illustrates another exemplary embodiment of the novel winding machine 1 including five winding heads 30 being located on the supporting structure 2 .
- Each winding head 30 has the design as described with respect to FIG. 1.
- the respective traversing triangles have different sizes. However, this does not have a negative effect since even the smallest traversing triangle has a substantial length such that changes concerning tension in the bobbin material 8 due to the winding process are neglectable. These changes concerning tension are so small that they are dampened by the control unit for the drive of the winding spindle 4 not reacting responsive to these changes.
- FIG. 4 illustrates another exemplary embodiment of the novel unit or device 14 .
- the illustration of FIG. 4 is similar to the one of FIG. 2.
- the arm 15 is designed as a scale being 31 .
- the scale being or balance arm 31 is a stiff component which is pivotal to a limited extent. For example, it may be pivotal about the bearing 32 being located in its middle portion.
- the respective sensor 25 is designed as a force sensor 33 , and it is located inside the machine unit 13 .
- the force sensor 33 determines the force of the scale being 31 being applied onto the roller 16 by the bobbin material 8 during the winding travel. The force is determined at the place where the force sensor 33 is located.
Abstract
Description
- This application claims the benefit of co-pending German Patent Application No. 100 46 844 entitled “Spulmaschine für insbesondere empfindliches Spulgut”, filed on Sept. 20, 2000.
- The present invention generally relates to a winding machine for winding up bobbin material arriving from a feeding apparatus. The winding machine includes a winding spindle being designed and arranged to be rotated by a drive and a unit for determining a signal which is proportional to the tension of the bobbin material.
- In many cases, the feeding apparatus which delivers the material to be wound up is not a structural component of the winding machine, but it is arranged in the end portion of a producing apparatus, for example a spinning apparatus, a finishing apparatus or the like being located upstream of the winding machine. However, there may also be a special arriving portion including guiding rollers which is located at the winding machine. Especially, the bobbin material may be sensitive material as, for example, yarn or tape. The bobbin material may be made of carbon fibers or glass fibers which are sensitive with respect to bending or friction. A plurality of changes concerning the direction of movement of the bobbin material and great angles of the bobbin being surrounded by the bobbin material at small radiuses may harm the bobbin material to an unacceptable extent. Such changing bending loads of the bobbin material are typical of known dancer arm arrangements in known winding machines.
- A winding machine is known from German Patent No. 37 23 593 C1. The known winding machine includes a winding spindle which is driven by a controllable drive. A bobbin is located on the winding spindle, the bobbin carrying the bobbin material to be wound up by the machine. The bobbin material is put on the bobbin in a traversing manner by a traversing apparatus or a different yarn guiding apparatus. A dancer device is arranged upstream of the traversing apparatus, the dancer device determining a signal which is proportional to the tension prevailing in the bobbin material (in other words: the tractive force subjecting the material). The signal is used to control the drive of the winding spindle. The known dancer arm arrangement further includes two stationary deflection rollers between which the dancer arm is arranged. The bobbin material surrounds the three rollers in a way of a lifting block assembly. A change of the tension of the yarn effects a movement of the dancer arm. The movement of the dancer arm is determined with respect to its value and its direction. The signal is used as the manipulated variable in the control loop for the control of the drive of the winding spindle. The engine of the drive is influenced in a way that the tension in the bobbin material returns to its former value. The tension in the bobbin material is produced by the dancer arm. For this purpose, the dancer arm is subjected by the force of a spring and/or by a weight. The tension produced in the bobbin material in this way has to be compensated by the engine of the drive of the winding spindle during the winding process. The torque being transmitted to the winding spindle by the engine of the drive does not depend from the control tension of the motor and from the number of rotations corresponding to the motor diagram. A torque control is used in the known machine. The number of rotations of the winding spindle is independent from the velocity of the arriving bobbin material and from the diameter of the material being wound up on the winding spindle.
- A winding machine for yarn arriving at constant velocity is known from European Patent No. 0 712 374 B1. The known winding machine includes a traversing apparatus for moving the yarn back and forth in a direction transverse to its main direction of movement. The known machine includes a winding spindle being driven by a motor. A dancer arm device includes two stationary deflection rollers and a deflection roller being located on the dancer arm. The dancer arm device is used to determine a signal which is proportional to the tension in the bobbin material. The bobbin material has to contact and surround a plurality of deflection rollers at least at partially substantial surrounding angles. Consequently, the bobbin material is subjected to substantial bending loads and also to changing bending loads in combination with respective friction forces. Especially in case of sensitive bobbin material being used, the bobbin material may be harmed or even destroyed.
- An apparatus for measuring the tension of moving yarn is known from German Patent No. 29 05 713 C2. The known apparatus includes fixed yarn guiding devices which ensure a straight movement of the yarn. The yarn passes a feeding apparatus, a first stationary head yarn guide, other prearranged units, a second stationary yarn guide, a traversing apparatus and, finally, a winding spindle on which the yarn is being wound up. A force transmitting device and a yarn excursion device is associated with the two fixed guiding devices. The force transmitting device includes a contact surface for the yarn which gets in frictional contact with the yarn to deflect an arm in response to the yarn excursion device. The tension of the yarn at maximum excursion and in the zero crossing of the traversing apparatus is measured by an extensometer strip device. The known unit for determining the tension in the bobbin material includes at least two stationary guiding devices. The bobbin material is subjected to substantial friction several times which has negative effects in case of sensitive bobbin material being used.
- The present invention relates to a winding machine for winding up bobbin material arriving from a feeding apparatus. The winding machine includes a winding spindle being designed and arranged to be rotated by a drive. A unit serves to determine a signal which is approximately proportional to the tension of the bobbin material. The unit includes an arm being designed and arranged to be movable to a limited extent and only one roller being arranged at the arm. The only one roller is designed and arranged to guide the bobbin material to contact the feeding apparatus and the roller without contacting other elements in between.
- The present invention also relates to a winding machine for winding up bobbin material arriving from a plurality of feeding apparatuses. The winding machine includes a plurality of winding spindles each being designed and arranged to be rotated by a drive. A plurality of traversing apparatuses each are designed and arranged to cooperate with one of the winding spindles to wind up the bobbin material. A plurality of units each serves to determine a signal which is approximately proportional to the tension of the bobbin material. Each of the units includes an arm being designed and arranged to be movable to a limited extent and only one roller being arranged at the arm. The only one roller is designed and arranged to guide the bobbin material to contact the respective feeding apparatus and the respective roller without contacting other elements in between.
- With the novel winding machine, it is possible to control a signal which is approximately proportional to the tension in the bobbin material to control the drive of the winding machine in a way to treat the bobbin material very carefully.
- The novel winding machine or winding apparatus includes only one roller instead of three deflection rollers as known in the prior art. With this one single roller, the tension in the bobbin material is determined by the movement of the roller. In this way, a signal is produced which has an influence on the engine of the drive driving the winding spindle by the control unit. This one single roller is supported on a movable arm or a bar. Especially, the arm is supported to be pivotable or bendable. The movement of the arm is limited to a small range which is substantially less than the one during the movement of a dancer arm as know in the prior art. The one single roller will still be surrounded by the bobbin material. However, it is possible to increase the bending radius by increasing the diameter of the one single roller to bend the bobbin material even more gentle and only in one direction at the roller. The two stationary deflection rollers known in the prior art are not needed in the novel winding machine. Their functions are fulfilled by different elements. The one single roller is arranged adjacent to the end of the feeding apparatus and the traversing apparatus. This means that no further deflection rollers are located between these two aforementioned elements. In the prior art, the tension in the bobbin material is produced between the two deflection rollers. In the novel winding machine, the tension in the bobbin material is produced between the one single roller and the winding spindle. The tension in the bobbin material is no longer produced by a dancer arm, but by the drive of the winding spindle. The engine or the motor of the drive of the winding spindle does not only compensate changes concerning the tension in the bobbin material, but it determines the tension in the bobbin material. The bobbin material moves on from the one single roller directly into the traversing apparatus. In this way, the traversing triangle is advantageously increased. The unit or the device for determining a signal which is approximately proportional to the tension in the bobbin material only needs to include a comparatively small number of components, it is compact and it may be produced at low costs. Without having to use additional mechanical components, as for example deflection rollers, it is possible to produce different characteristics of tension curves during a winding travel. The reason for this effect is the fact that the tension of the yarn or of a different bobbin material is only produced by the motor of the drive of the winding spindle. For example, reducing, increasing or constant tension values may be used in the form of software tables. These values may be easily and reproducibly used. Due to the fact that the bobbin material only surrounds one single roller, the bending load subjecting the bobbin material and friction forces are substantially reduced. The movement of the one single roller being arranged at the free end of the arm preferably has a value of less than approximately 1 mm. Preferably, the value may only be approximately a few {fraction (1/10)} mm. Consequently, the surrounding angle of the bobbin material at the one single roller does not substantially change, and the geometry of the arriving bobbin material remains substantially constant during the entire winding travel.
- The arm may include a bending bar and the unit may include at least one sensor for sensing deflection of the bending bar. There also is the possibility of directly designing the arm as a bending bar in a way that the arm is only supported at one side and the bending forces are applied by the bobbin material moving over the one single roller. However, it is also possible that the arm only functions as a lever arm and that it is operatively connected to a bending bar which is bent by the lever arm. In this way, it is possible to intentionally enlarge the lever arm in case of respective structural conditions. The bending bar includes a sensor for sensing the deflection. The sensor may be directly arranged on the bending bar, or it may be operatively connected to the bending bar. For example, the sensor may include extensometer strips. However, force sensors, way sensors and the like may also be used. The respective sensor may include an electronic unit with which the deflection is transformed to an electric signal, especially to an electric potential. The combination of the sensor and the electronic unit for evaluation purposes allows for a small, compact design.
- The arm may also be designed and arranged as a scale beam, and the unit may include at least one sensor for sensing the force of the bobbin material which subjects the one roller. The scale beam may also be designed as a control lever. It has a substantially stiff design, and it is supported approximately in its middle portion or outside its middle portion to transmit the force being applied onto the one single roller by the bobbin material to the sensor. The sensor may include extensometer strips, force sensors or the like.
- However, the preferred embodiment of the arm is the one with a bending bar including extensometer strips. It is possible without problems to fix the bending bar at its one end at the supporting structure of the winding machine, to arrange the extensometer strips approximately in the middle portion of the arm and to arrange the one roller at the free end of the arm. It makes sense to arrange the extensometer strips on the bending bar in association with the bending plane of the bending bar.
- The bending bar may have a nominal bending portion, and the extensometer strips may be arranged in the nominal bending portion. Such a nominal or desired bending portion may be designed as a weakened portion of the bending bar to improve elastic bending deformation at the place where the extensometer strips are arranged. Usually, the bending bar has a cylindrical design. In this case, the nominal bending portion may include flattened, plain surfaces on which the extensometer strips may be easily and effectively placed.
- The unit may further include a tubular housing including a plurality of adjustable stops, and the bending bar may be arranged in the tubular housing. The stops may be designed and arranged to limit deflection or movement of the bending bar in the tubular housing. For example, the adjustable stops may be designed as adjustable screws. The tubular housing also serves to protect the bending bar, the sensors and the electronic unit.
- In case the winding machine includes a plurality of winding heads each including a winding spindle and a traversing apparatus, the units each including one single roller and together being arranged at a separate machine unit may be arranged at a comparatively great distance with respect to the traversing apparatus of each winding head such that the traversing triangle gets especially long and the variations concerning tension in the bobbin material resulting from the winding process are reduced.
- Other features and advantages of the present invention will become apparent to one with skill in the art upon examination of the following drawings and the detailed description. It is intended that all such additional features and advantages be included herein within the scope of the present invention, as defined by the claims.
- The invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. In the drawings, like reference numerals designate corresponding parts throughout the several views.
- FIG. 1 is a schematic side view of the novel winding machine.
- FIG. 2 is a sectional view through the sensor according to line II-II of FIG. 1.
- FIG. 3 is a similar view as FIG. 1, but it illustrates a novel winding machine including five winding spindles.
- FIG. 4 is a similar view as FIG. 2, but it illustrates a sensor including a scale beam.
- Referring now in greater detail to the drawings, FIG. 1 illustrates a novel winding machine1 including a supporting
structure 2 carrying afront plate 3. A windingspindle 4 is rotatably supported in thefront plate 3. The windingspindle 4 extends through thefront plate 2, and it freely ends towards the outside. The windingspindle 4 is driven by a drive including an engine. The drive is not illustrated to simplify understanding of the drawing. The drive may a conventional one as it is used in the field of winding machines. The windingspindle 4 is supported by a bearing 5 to be pivotable to a certain limited extend. An elongated hole 6 is located in thefront plate 3 to allow for the pivotal movement. Abobbin 7 is put on the windingspindle 4. During the winding process, thebobbin material 8 is wound up on thebobbin 7. For example, thebobbin material 8 may be yarn or tape. The continuous lines illustrate the beginning of the winding process, meaning the beginning of the winding travel of the material with respect to thebobbin 7 and to thespindle 4, respectively. The position of the windingspindle 4 including the wound upbobbin material 8 at the end of the winding travel is illustrated by the broken line with two dots. - A
rotatable contact roller 9 is supported in a region of thefront plate 3 in association with the windingspindle 4. Therotatable contact roller 9 is stationary. At the beginning of the winding travel, thebobbin 7 being detachably located on the windingspindle 4 contacts the circumference of thecontact roller 9. During the winding travel, the surface of the wound up material of thebobbin material 8 contacts thecontact roller 9. A traversingapparatus 10 is associated with thecontact roller 9 and with the windingspindle 4. With the traversingapparatus 10, thebobbin material 8 is placed on the circumference of thebobbin 7 and on the already wound upbobbin material 8, respectively, over the length of thebobbin 7. The function of the traversingapparatus 10 is well known by a person with skill in the art. - The
bobbin material 8 is fed to the winding machine 1 by afeeding apparatus 11. In the illustrated exemplary embodiment, thefeeding apparatus 11 is not a component of the winding machine 1. Instead, it is located at the end of a producing unit for thebobbin material 8 with which thebobbin material 8 is continuously fed to the winding machine 1. However, it is also possible to arrange thefeeding apparatus 11 in the region of the winding machine 1. In the illustrated exemplary embodiment, thefeeding apparatus 11 includes two rollers which guide thebobbin material 8 and with which thebobbin material 8 is guided without having to change its direction of movement. - A
unit 14 for determining a signal which is proportional to the tension of thebobbin material 8 is arranged at aseparate machine unit 13 being supported on the supportingstructure 2. The tension of the bobbin material or the tension prevailing in the bobbin material is to be understood as the tension resulting from pulling forces subjecting the material. Theunit 14 serves to control the drive of the windingspindle 4. Theunit 14 includes anarm 15 having the design of a cylinder-like axle. Thearm 15 at its one end facing themachine unit 13 is fixedly connected, and at its freely protruding end, it carries aroller 16 over which thebobbin material 8 is guided. Thearm 15 may also be called a cantilever arm. Theroller 16 is the only roller and the only place at which the moving direction of thebobbin material 8 changes between the feedingapparatus 11 and the traversingapparatus 10. Thearm 15 with theroller 16 is arranged with respect to thefeeding apparatus 11 and the traversingapparatus 10 such that thebobbin material 8 surrounds theroller 16 at a respective surrounding angle. Theroller 16 at thearm 15 is supported to be freely rotatable to sensitively change the direction of movement of thebobbin material 8. Thebobbin material 8 is subjected to a bending load. However, compared to usual dancer arm arrangements known in the art, there only is a bending effect towards one side, but not an alternate bending effect. Additionally, the diameter of theroller 16 may be chosen to be comparatively great to further reduce the bending load. During the winding travel, meaning the movement of thebobbin material 8 over the length of thebobbin 7, thebobbin material 8 deflects thearm 15 with theroller 16 being located thereon in the direction ofarrow 17. The direction of thearrow 17 is the bisecting between thebobbin material 8 arriving at theroller 16 and leaving theroller 16. - The
novel unit 14 with theroller 16 replaces dancer arm arrangements known in the prior art which include two stationary deflecting rollers and one movable roller being located on the dancer arm. It is to be seen from FIG. 1 that the novel winding apparatus 1 does not include the two deflecting rollers as known from the prior art, and that thebobbin material 8 stays free from alternate bending forces. The arrangement of thenovel unit 14 on aseparate machine unit 13 allows for the possibility of choosing the distance between the traversingapparatus 10 and theunit 14 desirably great to attain a great traversing triangle. However, it is also possible to arrange theunit 14 in a different region of the supportingstructure 2. - It is to be seen from FIG. 1 that the
unit 14 for determining a signal which is approximately proportional to the tension in thebobbin material 8 to control the drive of the windingspindle 4 works different than known prior art devices. During use of a known dancer arm, the tension in thebobbin material 8 is produced by the dancer arm being subjected by springs, weights or the like, and the engine of the drive of the winding spindle only compensates variations of the tension. In the novel winding machine 1, the application of the tension in the bobbin material is exclusively produced by the engine of the drive of the windingspindle 4. Theonly roller 16 of the novel winding machine 1 also fulfils the functions of the two deflection rollers of prior art devices. In prior art winding machines, the tension in the bobbin material is produced between the two deflection rollers. In the novel winding machine 1, the tension in thebobbin material 8 is produced between the windingspindle 4 and theroller 16. In prior art winding machines, the traversing triangle is located between the last deflection roller being located upstream of the traversing apparatus and the dancer arm arrangement and the traversing apparatus. In the novel winding machine 1, the traversing triangle is located between the only oneroller 16 and the traversingapparatus 10. - FIG. 2 illustrates a section according to line II-II in FIG. 1 taking into account the direction of the
arrow 17. FIG. 2 shows thenovel unit 14 in greater detail. Theunit 14 includes the cylinder-like arm 15 in the form of a cantilever. In the illustrated exemplary embodiment, thearm 15 has the form of a bendingbar 18. The bending bar orbeam 18 at its oneend 19 is supported in atubular housing 20. Thetubular housing 20 is supported at themachine unit 13. In this way, the oneend 20 of the bendingbar 18 is fixedly supported in a way that theother end 21 of the bendingbar 18 freely protrudes or cantilevers. Theroller 16 in the region of thisend 21 is supported to be freely rotatable. The bendingbar 18 in its middle portion includes a desired bendingportion 22. The desired ornominal bending portion 22 is formed by flattened portions and by tapered portions of the bendingbar 18. At this place, the bendingbar 18 includes a plate-like portion 23 having plane surfaces on which, for example, extensometer strips 24 are located. The extensometer strips 24 form part of asensor 25 for determining the deflection of the bendingbar 18 in response to the tension in thebobbin material 8. Anelectronic unit 26 is located in the region of theend 19 of the bendingbar 18, or at least inside thetubular housing 20. The electric signal corresponding to the deflection of the bendingbar 18 is sent to the control unit (not shown) for the drive of the windingspindle 4 by theelectronic unit 26 and acable 27. - The
tubular housing 20 includesadjustable stops 28 to limit the maximum deflection of the bendingbar 18 in the direction of thearrow 17. The adjustable stops 28 may be designed as adjustment screws. Furthermore, aseal 29 is located in the front end portion of thetubular housing 20. Theseal 29 prevents dust and impurities from entering the interior of thetubular housing 20. - FIG. 3 illustrates another exemplary embodiment of the novel winding machine1 including five winding
heads 30 being located on the supportingstructure 2. Each windinghead 30 has the design as described with respect to FIG. 1. In the illustrated exemplary embodiment, there is aseparate machine unit 13 on which theunits 14 each being associated with a windinghead 30 are located. The respective traversing triangles have different sizes. However, this does not have a negative effect since even the smallest traversing triangle has a substantial length such that changes concerning tension in thebobbin material 8 due to the winding process are neglectable. These changes concerning tension are so small that they are dampened by the control unit for the drive of the windingspindle 4 not reacting responsive to these changes. - FIG. 4 illustrates another exemplary embodiment of the novel unit or
device 14. The illustration of FIG. 4 is similar to the one of FIG. 2. In the illustrated embodiment, thearm 15 is designed as a scale being 31. The scale being orbalance arm 31 is a stiff component which is pivotal to a limited extent. For example, it may be pivotal about thebearing 32 being located in its middle portion. In the illustrated embodiment, therespective sensor 25 is designed as aforce sensor 33, and it is located inside themachine unit 13. Theforce sensor 33 determines the force of the scale being 31 being applied onto theroller 16 by thebobbin material 8 during the winding travel. The force is determined at the place where theforce sensor 33 is located. - Many variations and modifications may be made to the preferred embodiments of the invention without departing substantially from the spirit and principles of the invention. All such modifications and variations are intended to be included herein within the scope of the present invention, as defined by the following claims.
Claims (30)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10046844A DE10046844A1 (en) | 2000-09-20 | 2000-09-20 | Winding machine for particularly sensitive items to be wound |
DE10046844.6-26 | 2000-09-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030019970A1 true US20030019970A1 (en) | 2003-01-30 |
Family
ID=7657135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/954,875 Abandoned US20030019970A1 (en) | 2000-09-20 | 2001-09-12 | Winding machine |
Country Status (5)
Country | Link |
---|---|
US (1) | US20030019970A1 (en) |
EP (1) | EP1190974B1 (en) |
JP (1) | JP2002145527A (en) |
AT (1) | ATE295326T1 (en) |
DE (2) | DE10046844A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6901818B1 (en) * | 2002-12-05 | 2005-06-07 | Maxwell C. Cheung | Tension measuring device for mooring line |
CN102928148A (en) * | 2012-10-22 | 2013-02-13 | 浙江工业大学 | Method for correcting tension measurement value |
CN102928149A (en) * | 2012-10-22 | 2013-02-13 | 浙江工业大学 | Tension sensor device capable of eliminating influence of friction force |
CN105883476A (en) * | 2016-05-24 | 2016-08-24 | 广东溢达纺织有限公司 | Winding device capable of automatically discharging yarn |
CN114701673A (en) * | 2022-03-22 | 2022-07-05 | 中国人民解放军战略支援部队航天工程大学 | Deployable arm docking mechanism, design method thereof and spacecraft docking system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008032643B3 (en) * | 2008-07-10 | 2009-12-24 | Georg Sahm Gmbh & Co. Kg | Fadenumlenkeinheit for a winder |
DE202010008846U1 (en) | 2010-10-20 | 2010-12-23 | Starlinger & Co Ges.M.B.H. | Dishwasher |
DE102011052699B4 (en) | 2011-08-12 | 2015-12-31 | Georg Sahm Gmbh & Co. Kg | Winding machine and method for controlling the same |
CN103306075B (en) * | 2013-06-05 | 2015-12-23 | 冯小斌 | Winding headstock |
AT517296B1 (en) | 2015-06-11 | 2017-03-15 | Bsw Machinery Handels-Gmbh | Winding machine for winding up winding material |
DK3626657T3 (en) * | 2018-09-19 | 2021-04-19 | Sahm Georg Fa | Spooling machine |
CN111350023B (en) * | 2020-04-24 | 2021-12-03 | 宁夏灵智科技有限公司 | Novel tension tensioning device for spinning thread of knitting equipment |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3526130A (en) * | 1968-04-08 | 1970-09-01 | Owens Corning Fiberglass Corp | Apparatus and method for measuring tension in linear material |
JPS5751300Y2 (en) * | 1977-07-30 | 1982-11-09 | ||
JPS6023065B2 (en) * | 1978-02-16 | 1985-06-05 | 東レ株式会社 | Yarn winding device |
US4233837A (en) * | 1979-02-08 | 1980-11-18 | Owens-Corning Fiberglas Corporation | Apparatus for measuring tension in a linear material |
DE3343286A1 (en) * | 1983-11-30 | 1985-06-05 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Method and arrangement for winding up wound material |
US4548085A (en) * | 1983-12-14 | 1985-10-22 | Ppg Industries, Inc. | Tension measuring device and method for flexible linear material |
US4546656A (en) * | 1983-12-14 | 1985-10-15 | Ppg Industries, Inc. | Tension measuring device and method for filamentary material |
JPH0658273B2 (en) * | 1985-06-10 | 1994-08-03 | ピ−ピ−ジ− インダストリ−ズ,インコ−ポレ−テツド | Apparatus and method for measuring tension of flexible linear material |
JPH01150678A (en) * | 1987-12-04 | 1989-06-13 | Toa Nenryo Kogyo Kk | Fragile fiber bundle doubler |
DE4110429C2 (en) * | 1990-03-30 | 1995-06-29 | Honigmann Ind Elektronik Gmbh | Traction measuring device |
DE9113098U1 (en) * | 1990-03-30 | 1992-02-06 | Honigmann Industrielle Elektronik Gmbh, 5600 Wuppertal, De | |
DE4037065A1 (en) * | 1990-11-22 | 1992-05-27 | Hottinger Messtechnik Baldwin | FORCE MEASURING DEVICE FOR MEASURING THE TENSION TENSION OF THREADS |
DE4204231C2 (en) * | 1992-02-13 | 1995-04-06 | Honigmann Ind Elektronik Gmbh | Traction measuring device |
JPH07285739A (en) * | 1994-04-19 | 1995-10-31 | Fujikura Ltd | Tension measuring method at optical fiber drawing process |
DE29713328U1 (en) * | 1997-07-26 | 1997-10-09 | Tensometric Mestechnik Stroehm | Traction measuring device |
-
2000
- 2000-09-20 DE DE10046844A patent/DE10046844A1/en not_active Withdrawn
-
2001
- 2001-09-06 DE DE50106182T patent/DE50106182D1/en not_active Expired - Lifetime
- 2001-09-06 AT AT01121322T patent/ATE295326T1/en active
- 2001-09-06 EP EP01121322A patent/EP1190974B1/en not_active Expired - Lifetime
- 2001-09-12 US US09/954,875 patent/US20030019970A1/en not_active Abandoned
- 2001-09-19 JP JP2001284789A patent/JP2002145527A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6901818B1 (en) * | 2002-12-05 | 2005-06-07 | Maxwell C. Cheung | Tension measuring device for mooring line |
CN102928148A (en) * | 2012-10-22 | 2013-02-13 | 浙江工业大学 | Method for correcting tension measurement value |
CN102928149A (en) * | 2012-10-22 | 2013-02-13 | 浙江工业大学 | Tension sensor device capable of eliminating influence of friction force |
CN105883476A (en) * | 2016-05-24 | 2016-08-24 | 广东溢达纺织有限公司 | Winding device capable of automatically discharging yarn |
CN114701673A (en) * | 2022-03-22 | 2022-07-05 | 中国人民解放军战略支援部队航天工程大学 | Deployable arm docking mechanism, design method thereof and spacecraft docking system |
Also Published As
Publication number | Publication date |
---|---|
EP1190974A3 (en) | 2003-03-05 |
ATE295326T1 (en) | 2005-05-15 |
DE50106182D1 (en) | 2005-06-16 |
EP1190974A2 (en) | 2002-03-27 |
EP1190974B1 (en) | 2005-05-11 |
DE10046844A1 (en) | 2002-04-18 |
JP2002145527A (en) | 2002-05-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20030019970A1 (en) | Winding machine | |
US4759226A (en) | Device for measuring the tensile force on a thread | |
JP3274185B2 (en) | Yarn tension sensor for textile machinery | |
US3931938A (en) | Method and apparatus for winding yarn into yarn package | |
US4233837A (en) | Apparatus for measuring tension in a linear material | |
US3679808A (en) | Method and apparatus for measuring yarn tension | |
US5033400A (en) | Thread tensioning device for a sewing machine | |
EP0527705A1 (en) | Method and apparatus for detecting warp tension in a weaving loom | |
JP4510424B2 (en) | Sheet material winding device | |
US5090453A (en) | Torsion bar type warp tensioning device for a loom | |
EP1819617B1 (en) | Reel-up and a method for reeling and measuring unit in such a reel-up | |
JP3060954B2 (en) | Yarn tension sensor | |
US7052194B2 (en) | Apparatus and method for controlling a ribbon transport mechanism | |
KR102637289B1 (en) | winding machine | |
US5277072A (en) | Device for measuring a force causing tensile stress in a thread | |
US5697247A (en) | Apparatus for measuring the thickness and/or irregularity of slivers | |
CN100410432C (en) | Fiber conveying and discarding device to be connected to a carder | |
JP3651257B2 (en) | Mechanism for detecting the separation of the wire from the pulley in the tension measuring section of the wire rewinding device | |
US6481275B1 (en) | Method and apparatus for measuring the tension of a moving web | |
JP3750030B2 (en) | Method and apparatus for detecting the mass of a fiber material in a spinning machine | |
US4629902A (en) | Device for measuring web tension | |
JPH03246433A (en) | Tension detector | |
JP3707465B2 (en) | Wire rewinding device | |
JPH07260600A (en) | Load detector and tension detector | |
JPH1183652A (en) | Assembled type tension detecting sensor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GEORG SAHM GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GERNHARDT, HEINZ;RABE, HELMUT;WINKLER, KONRAD;AND OTHERS;REEL/FRAME:012181/0621 Effective date: 20010801 |
|
AS | Assignment |
Owner name: GEORG SAHM GMBH & CO. KG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GERNHARDT, HEINZ;RABE, HELMUT;WINKLER, KONRAD;AND OTHERS;REEL/FRAME:012460/0508 Effective date: 20010801 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |