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:
Mar. 27, 2001
Filed:
Mar. 09, 2000
Applicant:
Inventors:
Theodor Janocha, Bielefeld, DE;
Wolfgang Buchta, Bielefeld, DE;
Jörg Bunte, Bielefeld, DE;
Karsten Filges, Bielefeld, DE;
Klaus Meyer, Bielefeld, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D05B 3/06 ; D05B 4/704 ;
U.S. Cl.
CPC ...
D05B 3/06 ; D05B 4/704 ;
Abstract
A buttonhole sewing machine comprises a needle thread feeding mechanism, in which the needle thread is guided over a cam disk, which performs a rotation during two stitches of the needle. Along its periphery, the cam disk has such a curvature that tensioning and releasing the needle thread complies with the requirements of alternately sewing a single thread chain stitch and a double thread chain stitch during the sewing of a zigzag buttonhole seam.