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:
Nov. 07, 1978
Filed:
Apr. 05, 1976
Herbert M Bond, St. Paul, MN (US);
Charles E Ring, Minneapolis, MN (US);
John A Edgar, St. Paul, MN (US);
Ronald Bennett, Minneapolis, MN (US);
Willis K Paul, Bloomington, MN (US);
Roland N Harshbarger, St. Paul, MN (US);
Buckbee-Mears Company, St. Paul, MN (US);
Abstract
An etching system having a first member for unrolling and fastening a protective film on one side of a continuous strip of metal and a second member for smoothly stripping the protective film from the continuous strip of metal after the continuous strip of metal and the protective film have passed between sets of spray jets that are located on opposite sides of the continuous strip of metal. Further etching and rinsing stations are provided for completing the etching process to enable mass production of television aperture masks having a plurality of openings which have a dimension on the order of or less than the thickness of the mask material.