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. 15, 2001
Filed:
Nov. 12, 1999
Applicant:
Inventors:
James R Seay, Lake Forest, CA (US);
Peter M. Coombs, Tustin, CA (US);
Assignee:
Gradco (Japan) Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B26D 5/16 ;
U.S. Cl.
CPC ...
B26D 5/16 ;
Abstract
A punch is disclosed in which cams at the opposite ends of a rotary shaft move a spring returned mechanism so as to apply a force to a number of punches which are aligned across a pressure plate and movable towards a die plate for punching sheets of paper fed between the pressure plate and the die plate upon each revolution of the shaft and the cams, the punches being formed and supported by the pressure plate so as to progressively enter the sheet of paper to allow for a reduction in the motor force required for performing a punching operation.