The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 1982
Filed:
Nov. 14, 1980
Helmut Heimberger, Steinhausen, CH;
Optilon W. Erich Heilmann GmbH, Cham, CH;
Abstract
An apparatus for forming coupling members of synthetic resin for application to a support tape in the production of a slide-fastener stringer comprises a forming wheel to which an endless band is fed to form mold cavities on the periphery of the wheel which are filled with synthetic resin. According to the invention, a further band is fed to overlie the first band and define undercut portions of the cavity to produce projections in the molded members which can engage when the latter are applied to a support tape. A continuous core can be fed to the drum periphery to be embedded in the coupling members as they are formed so that the row of coupling members is produced as a succession of teeth on this continuous element.