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:
Dec. 26, 1978
Filed:
Oct. 31, 1977
Gerhard Riss, Bielefeld, DE;
Durkoppwerke GmbH, Bielefeld, DE;
Abstract
A method of and apparatus for the sewing of a succession of stitchgroups on a workpiece and for the feeding of a new workpiece into sewing position, e.g. for producing buttonholes on shirtfronts. The buttonholes are formed by linearly displacing a buttonhole stitching machine stepwise relative to a clamped edge of a fabric workpiece, and a second clamp adjacent the first is provided to retain a second workpiece in position. When the first row of buttonholes is completed upon movement of the machine in one direction, the fabric workpiece, which has been buttonholed, is released, the second fabric is engaged and brought into position, and the sewing machine is displaced in the opposite direction to form a respective row of buttonholes on the new fabric.