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:
Feb. 03, 1976
Filed:
Jul. 22, 1974
Frank F Winter, Chicago, IL (US);
Union Special Corporation, Chicago, IL (US);
Abstract
This disclosure relates to a thread cutter mechanism for sewing machines wherein at the end of a stitching operation, a spreader member extends into the needle thread loop and expands the same transversely so that both the bobbin thread and the needle thread may be severed in a single operation. Cooperating cutter knives, mounted to swing arcuately, cooperate with the loop spreader to effect the necessary thread cutting. In addition, there is provided a bobbin thread pull-off member which serves to pull thread off of the bobbin prior to the severing of the bobbin thread by the cutter knives. The cutter knives, loop spreader and bobbin thread pull-off member are all actuated in an arcuate path by means of slide bars which are actuated by mechanism controlled in timed relation to the operation of the sewing machine.