Textiles: cloth finishing – Expanding device for textile webs – Web-condition-responsive operation control
Patent
1977-05-04
1978-08-01
Mackey, Robert R.
Textiles: cloth finishing
Expanding device for textile webs
Web-condition-responsive operation control
26 84, D06C 500
Patent
active
041034023
ABSTRACT:
The disclosure is directed to an improved stop mechanism for controlling edge drives of fabric spreaders, in the processing of tubular knitted fabrics. A combination spreader and propeller mechanism, consisting of a frame and fabric engaging belts, is received internally of a section of tubular knitted fabric, in order to distend the fabric laterally during or prior to certain processing operations. The fabric engaging belts are driven by means of edge drive rolls, which externally engage the fabric at its opposite edges and drive the belts through the intervening fabric layer. Occasionally, the fabric may jam on the spreader frame such that, with continued fabric movement, the spreader frame tends to become dislodged from the edge drive rolls. Various photoelectric and mechanical arrangements have been proposed for stopping the equipment at such times, in order to prevent damage to the spreader frame and/or other parts of the equipment. The present disclosure relates specifically to a new and improved magnetic proximity arrangement for stopping the processing equipment in response to dislodgement of the spreader frame from its normal position. The mechanism of the invention incorporates specific features which are ideally suited for the harsh environment in which it operates, frequently involving the processing of wet fabric and/or the application of steam nearby, the presence of lint, etc. The mechanism provides for lateral adjustment of the position of the switch for optimum sensitivity with spreader frames of different configuration.
REFERENCES:
patent: 3875624 (1975-04-01), Frezza
Mackey Robert R.
Samcoe Holding Corporation
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