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. 21, 1993
Filed:
Jan. 17, 1992
Applicant:
Inventors:
Bernd Matschulat, Aldingen, DE;
Robert Massen, Radolfzell, DE;
Bernhard Mertel, Enkenbach-Alsenborn, DE;
Assignee:
G.M. Pfaff Aktiengesellschaft, Kaiserslautern, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D05B / ; D05B / ; D05B / ;
U.S. Cl.
CPC ...
11212112 ; 112306 ; 250561 ;
Abstract
To scan the material being sewn (30, 31) in a sewing machine in an annular area around the presser foot, an annular lens system (25) is provided, which images a circle (33) concentrically surrounding the presser foot in the plane (A) of the material being sewn onto the light inlet ends of a likewise annularly arranged plurality of optical fibers (26). The optical fibers (26) lead, in an individual assignment, to the individual light-receiving elements of a photoelectric sensor line of a line camera, which sensor line can be read cyclically.