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:
Sep. 05, 1995
Filed:
Sep. 29, 1993
Joseph M Hamill, King William, VA (US);
Ronald A Hulit, Mechanicsville, VA (US);
Anthony M Lewandowski, II, Mechanicsville, VA (US);
Gerd Papajewski, Karlsruher, DE;
Reinhold Papajewski, Karlsruher, DE;
AMF Reece, Inc., Mechanicsville, VA (US);
Abstract
The invention relates to thread trimming devices for eyelet buttonhole machines. The invention comprises a thread trimming device having a snap action spring arm knife. As the thread hook positions the thread and gimp, a cam lifts up the end of the spring arm. The cam then releases the knife whose torque snaps down and cuts the thread and gimp against a second knife edge. The thread and gimp are also held together at this point for the next buttonhole by a thread retainer which is built into the knife.