Apparatus and method for controlling an off loom take-up
First Claim
1. An off-loom take-up for winding a cloth roll from woven cloth coming from a loom comprising:
- a frame;
a pair of spaced take-up rollers carried by said frame, at least one of said take-up rollers being a driven take-up roller;
a drive motor having an output shaft for driving said driven take-up roller;
a motor controller for controlling the speed of said output shaft of said drive motor;
a pivotal directional roll assembly carried by said frame including a directional roll about which said cloth travels from said loom to said cloth take-up roll, and said directional roll having a first position in which said roll applies a preset tension to said cloth;
a motor controller having a first speed signal and a second speed signal, said motor controller operating said drive motor at a first speed in response to said first speed signal, and said motor controller operating said drive motor at a second speed which is higher than said preset speed in response to said second speed signal; and
a detector responsive to a movement of said pivotal directional roll to a second position displaced from said first position of said directional roll for producing an electrical signal which is delivered to said motor controller for producing said second speed signal so that said drive motor momentarily operates at said high speed until said directional roll moves away from said second position.
1 Assignment
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Accused Products
Abstract
An apparatus and method for controlling the drive of an off loom take-up which winds cloth upon a cloth roll is disclosed. The off loom take up comprises a pair of spaced, driven take-up rollers upon which the cloth roll is supported and rotated. As cloth coming from the loom is directed to the cloth roll being wound, it passes underneath a pivotal directional roll which is supported on spaced pivotal arms. A motor controller controls an electric motor which drives the driven take-up rollers at a preset speed which allows the cloth to travel at the directional roll at a slightly slower speed than the speed at which the cloth travels leaving the take-off rolls of the loom. This establishes a predetermined downward "creep" in the movement of the pivotal directional roll. The downward movement of the directional roll is sensed by a detector. When the directional roll descends a prescribed distance, the detector momentarily sends a high speed signal to the drive motor which momentarily steps up the speed of the drive motor and the cloth roll being to take out the slack of the cloth. The preset speed is resumed and the high speed signal is discontinued. Conveniently, the tension of the cloth created by the directional roll can be adjusted to a desired tension by placing the detector object on a movable bracket so that the position at which the detector switch is activated may be varied in accordance with different descending horizontal positions of the directional roll.
11 Citations
25 Claims
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1. An off-loom take-up for winding a cloth roll from woven cloth coming from a loom comprising:
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a frame; a pair of spaced take-up rollers carried by said frame, at least one of said take-up rollers being a driven take-up roller; a drive motor having an output shaft for driving said driven take-up roller; a motor controller for controlling the speed of said output shaft of said drive motor; a pivotal directional roll assembly carried by said frame including a directional roll about which said cloth travels from said loom to said cloth take-up roll, and said directional roll having a first position in which said roll applies a preset tension to said cloth; a motor controller having a first speed signal and a second speed signal, said motor controller operating said drive motor at a first speed in response to said first speed signal, and said motor controller operating said drive motor at a second speed which is higher than said preset speed in response to said second speed signal; and a detector responsive to a movement of said pivotal directional roll to a second position displaced from said first position of said directional roll for producing an electrical signal which is delivered to said motor controller for producing said second speed signal so that said drive motor momentarily operates at said high speed until said directional roll moves away from said second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An off-loom take-up for winding a cloth roll from woven cloth coming from a loom, said take-up having a pair of generally parallel, spaced take-up rollers upon which said cloth roll is supported and formed, at least one of said take-up rollers constituting a driven take-up roller which is rotated by a drive motor, first and second spaced pivotal arms carried by said frame, a directional roll carried by said pivotal arms so that said directional roll moves in an arcuate path, said cloth coming from said loom passing about said directional roll along a path to said cloth roll, a motor controller for controlling the operation of said drive motor in response to movements of said directional roll, said take-up comprising:
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a manual control included in said motor controller for manually setting the operation of said drive motor to establish a preset, cloth speed differential between the rate of travel of said cloth leaving said loom and at said directional roll so that a desired creep is established in the movement of said directional roll during cloth take-up; a detector responsive to movement of said directional roll from a first position to a second position displaced from said first position of said directional roll; said detector producing an electrical signal in response to said directional roll reaching said second position; said motor controller generating a high speed signal in response to said electrical signal to momentarily operate said drive motor at a high speed until said directional roll moves sufficiently away from said second position. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method for controlling cloth wound into a cloth roll on an off-loom take-up, said take-up having a pair of spaced, generally parallel take-up rollers, at least one of said take-up rollers be a driven take-up roller driven by a drive motor, a pivotal directional roll having a pivot arm pivotally carried by said frame, a motor controller for controlling the operation of said drive motor in response to pivotal moment of said directional roller said method comprising:
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adjusting said motor controller to wind said cloth at a first speed which establishes a predetermined speed differential in the rate of cloth leaving said loom and arriving at said direction roll, and said pivotal directional roll having a first position which varies due to said speed differential; detecting a movement of said directional roll to a second position below said first position of said directional roll; producing an electrical signal responsive to said movement of said directional roll to said second position, and delivering said electrical signal to said motor controller; and producing a motor control signal in response to said electrical signal which places said drive motor in a high speed mode of operation momentarily until said directional roll moves sufficiently away from said second position toward said first position. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. An off-loom take-up for winding a cloth roll from woven cloth coming from a loom, said take-up having a pair of generally parallel, spaced take-up rollers upon which said cloth roll is supported and formed, at least one of said take-up rollers constituting a driven take-up roller which is rotated by a drive motor, first and second spaced pivotal arms carried by a frame, a directional roll carried by said pivotal arms so that said directional roll moves in an arcuate path, said cloth coming from said loom passing about said directional roll along a path to said cloth roll, a motor controller for controlling the operation of said drive motor in response to movements of said directional roll, said take-up comprising:
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first and second stud shafts affixed respectively to said first and second pivotal arms; a biasing spring having a first end interconnected to said first pivotal arm and a second end attached to said frame, a hollow torsion tube connected between said first and second stud shafts to resist relative twisting of first and second arms; and whereby the need for a second biasing spring interconnected to said second pivotal arm is eliminated due to the effective torque resistance of said hollow torsion tube.
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Specification