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:
Dec. 14, 1976
Filed:
Apr. 01, 1976
Melvin F Rogers, Western Springs, IL (US);
Zenith Radio Corporation, Chicago, IL (US);
Abstract
This disclosure depicts, for use in salvaging parts from a color television cathode ray tube of the type having a glass bulb comprising an approximately rectangular, flangeless, curved faceplate and a funnel having a convex seal land, a novel method for separating the funnel and the faceplate. The funnel seal land mates with a concave rear surface of the faceplate to define a contoured sealing interface. The faceplate is sealed to the funnel with a frit material located at the sealing interface. The method comprises establishing the bulb at a predetermined initial temperature; concurrently down-shocking (effecting a sudden cooling of the surface of) the faceplate and the corner regions of the funnel for a predetermined brief period of time, causing separation at the sealing interface of the faceplate from the corner regions of the funnel; then down-shocking the side regions of the funnel near the sealing interface for a predetermined brief period of time while continuing to down-shock the faceplate and the corner regions of the funnel, to cause a complete separation of the faceplate from the funnel at the sealing interface.