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:
Jul. 20, 1999
Filed:
Sep. 25, 1997
Applicant:
Inventor:
Edward F Helinski, Johnson City, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B26B / ;
U.S. Cl.
CPC ...
83575 ; 83588 ; 83590 ;
Abstract
Hole punching apparatus for punching holes in thin sheet material and having a punch mounted for reciprocating movement. The punch includes a punch stem, and an elastomeric bumper mounted on the punch stem. The bumper acts as a shock absorber when the punch is moved in a first direction to punch a hole in the thin sheet material and eliminates collision of metallic parts as the punch reaches the end of its stroke.