Textiles: cloth finishing – Expanding device for textile webs – Web-condition-responsive operation control
Patent
1977-06-28
1978-07-04
Mackey, Robert R.
Textiles: cloth finishing
Expanding device for textile webs
Web-condition-responsive operation control
26 97, 26 98, D06C 306
Patent
active
040979733
ABSTRACT:
An apparatus comprises guide means including a stationary roller and a movable roller opposed to the stationary roller and movable toward or away therefrom to nip a selvage of the fabric between the rollers when required to correct deviation of the fabric, and unfolding and spreading means including at least three screw rollers arranged side by side at the feed side of the guide means and along the direction of travel of the fabric. Each of the screw rollers is rotatable by a motor in the direction of unfolding and spreading the fabric, at least one of the screw rollers other than the screw rollers at the opposite sides thereof being pivotally movable toward or away from the surface of the fabric. The stationary roller of the guide means includes a roller main body and a shaft rotatable by the motor in the same direction as the direction of travel of the fabric. A friction member having suitable frictional resistance is provided between the shaft and the stationary roller main body to render the stationary roller main body rotatable by the motor when the movable roller is away from the stationary roller. When a selvage sensor detects inward deviation of the selvage, the movable guide roller is brought into contact with the stationary guide roller to nip the selvage for the correction of the deviation and, at the same time, the pivotally movable screw roller is brought into the space between the other two screw rollers to cause the fabric to contact the screw rollers over increased areas with an increase force to give an enhanced unfolding and spreading effect.
REFERENCES:
patent: 2639483 (1953-05-01), Wester
patent: 3414954 (1968-12-01), Alexeff
patent: 3822448 (1974-07-01), Cho
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