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:
Nov. 06, 2007
Filed:
Mar. 30, 2005
John E. Carsley, Clinton Township, MI (US);
Wayne W. Cai, Troy, MI (US);
Gary A. Kruger, Troy, MI (US);
Paul E. Krajewski, Sterling Heights, MI (US);
Yang-tse Cheng, Rochester Hills, MI (US);
John E. Carsley, Clinton Township, MI (US);
Wayne W. Cai, Troy, MI (US);
Gary A. Kruger, Troy, MI (US);
Paul E. Krajewski, Sterling Heights, MI (US);
Yang-Tse Cheng, Rochester Hills, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
Various embodiments of roller hemming apparatus and methods are disclosed including one wherein multiple rollers are carried on a single mount to hem a flange in a single pass, another including induction heating and air quenching means movable with a roller to anneal the flange just prior to hem forming, and another in which friction from a rotatably driven roller heats the flange to reduce bending stresses during hemming of the flange.