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:
May. 04, 1993
Filed:
Dec. 06, 1991
Applicant:
Inventors:
Michael F Bongiovanni, Amherst, NY (US);
Samuel Cicatello, East Amherst, NY (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72-9 ; 72185 ;
Abstract
A center machine for producing corrugated fins for heat exchangers has servomotor driven pullout rolls for stretching a compressed corrugated strip to desired fin density and normally driven in phase with corrugation forming rolls. A cutoff knife severs parts from the strip and a sensor measures the length of each part. A control determines part length error, calculates servomotor speed adjustment needed to nearly correct the error and causes such a speed adjustment for a short period to alter the phase of the pullout rolls relative to the forming rolls.