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:
Jun. 21, 1977
Filed:
Feb. 18, 1975
Hansjurgen Pickert, Kerkrade, NL;
Hans Dieter Sesselmann, Rodingen, DT;
Leonardes August Timmers, Mechelen, NL;
William Prym-Werke KG, Stolberg, Rhineland, DT;
Abstract
Apparatus for simultaneously sewing two coupled stringers of a slide fastener onto portions of a carrier to opposite sides of an elongated slit therein, in which the carrier is elastic in the direction of the slit, in which a slide carrying a device for releasably holding one end of the slide fastener and one end of the carrier in the region of the slit therein is movable along an elongated guide rail fastened at one end to a two-needle sewing machine in the region of the needle plate of the latter, and in which the slide is biased with a substantially contact force in a direction toward the other end of the guide rail, that is in a direction opposite to that in which the slide fastener and the carrier move during the sewing operation to thereby keep the elastic carrier during the sewing operation under constant tension.