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:
Mar. 07, 1995
Filed:
Nov. 18, 1992
Applicant:
Inventors:
Fusao Ishii, Pittsburgh, PA (US);
Joseph A Marcanio, Greensburgh, PA (US);
Assignee:
Sony Electronics, Inc., Park Ridge, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
226 76 ; 226 82 ;
Abstract
A thin strip or flat web of metal material is transported longitudinally in a stable manner and without contact to the working surface by providing a generally constant transverse tension to the web. Equally spaced holes are punched along the outer edges of the web and two oppositely arranged sprockets engage the holes and drive the metal strip without any contact across the width of the strip. The two sprockets are slidably engaged for concurrent rotation with each other and biased outwardly by a spring to provide the constant transverse tension as the web is driven longitudinally.