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:
Jun. 11, 2013
Filed:
Feb. 05, 2009
Paul E. Krajewski, Troy, MI (US);
Richard Harry Hammar, Shelby Township, MI (US);
Jugraj Singh, Lake Orion, MI (US);
Dennis Cedar, Rochester, MI (US);
Peter A. Friedman, Ann Arbor, MI (US);
Yingbing Luo, Ann Arbor, MI (US);
Paul E. Krajewski, Troy, MI (US);
Richard Harry Hammar, Shelby Township, MI (US);
Jugraj Singh, Lake Orion, MI (US);
Dennis Cedar, Rochester, MI (US);
Peter A. Friedman, Ann Arbor, MI (US);
Yingbing Luo, Ann Arbor, MI (US);
USAMP, Southfield, MI (US);
Abstract
An elevated temperature forming system in which a sheet metal workpiece is provided in a first stage position of a multi-stage pre-heater, is heated to a first stage temperature lower than a desired pre-heat temperature, is moved to a final stage position where it is heated to a desired final stage temperature, is transferred to a forming press, and is formed by the forming press. The preheater includes upper and lower platens that transfer heat into workpieces disposed between the platens. A shim spaces the upper platen from the lower platen by a distance greater than a thickness of the workpieces to be heated by the platens and less than a distance at which the upper platen would require an undesirably high input of energy to effectively heat the workpiece without being pressed into contact with the workpiece.