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. 07, 1992
Filed:
Oct. 29, 1990
Applicant:
Inventors:
Robert Adler, Northfield, IL (US);
Charles J Prazak, III, Elmhurst, IL (US);
Johann Steiner, Des Plaines, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
445 68 ; 29448 ; 269 34 ;
Abstract
Method and apparatus are disclosed for tensioning uniform foil shadow masks by clamping the edges of a mask and moving the clamps through a preselected fixed displacement, thereby obviating the need for extensive controls on the tensioning process.