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. 16, 1993
Filed:
Jan. 17, 1992
Applicant:
Inventor:
Terry J Hunt, Lockport, NY (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72187 ; 72226 ;
Abstract
A machine for making corrugated fins or air centers for heat exchangers from strip stock has forming rolls, packing rolls, metering rolls and two pairs of pullout rolls, each pair having a different number of teeth to produce a different pitch of convolutions. The pairs of pullout rolls are mounted for movement apart or together under control of a cam mechanism so that one pair yielding the desired pitch can engage the centers to set the pitch while the other pair is moved apart to disengage the centers.