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US 4,714,573 AGranted
Method of manufacturing molded slide fastener coupling elements
AssigneeYoshida Kogyo K. K.
InventorHiroshi Yoshida
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Abstract
A method of supplying a thermoplastic material to a molding machine for molding the same into a desired formation on slide fastener tapes is disclosed, whereby a composite plastic material, consisting in such a predetermined ratio of a fresh supply of material and removed runners and sprues, is fed so as to enable homogeneous color distribution of the resulting element chain on the fastener.
Claims2
In the manufacture of a slide fastener chain having molded thereon rows of coupling elements made of a thermoplastic material, a process which comprises the steps of:
- cutting and removing runners and sprues from the rows of coupling elements immediately after the fastener chain has been withdrawn from a mold;
- pelletizing the runners and sprues to a predetermined particle size;
- recycling the thus pelletized material for re-use in combination with a fresh supply of thermoplastic chips;
- and controllng a supply of the pellitized material and the fresh supply of thermoplastic chips to fall within a predetermined ratio.
1 more element
Dependencies are inferred from the claim text.