Method and means for winding helical coils from thermoplastic ma

Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Reshaping running or indefinite-length work

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Details

264DIG40, 425334, 425391, 425DIG7, B29C 1702

Patent

active

043882641

ABSTRACT:
A method of and means of winding close wound helical coils of a thermoplastic monofilament material is proposed wherein, in order to avoid secondary twist in the resultant coil, the coil, after having been wound and heat set under controlled conditions on a first part of a mandrel, is twisted in a direction tending to close the individual turns of the coil during the cooling thereof while passing along and/or from the end of a second part of the mandrel to a twist arresting means arranged in spaced apart disposition relative to such end.

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patent: 4285899 (1981-08-01), Pavy et al.

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