Method of manufacturing a cathode-ray tube

Details Method of manufacturing a cathode-ray tube Method of manufacturing a cathode-ray tube

1979-06-25

1981-12-08

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65110, 65277, 65292, 220 21A, 313482, C03B 2308

Patent

active

043045863

ABSTRACT:
A method of manufacturing a cathode-ray tube is provided by drawing a glass tube section softened by heating onto a mandrel whose transverse dimensions increase near one end of the tube section in the direction of the end at least twice in a generally stepwise manner, so that in the direction of the end, upon drawing, at least a first and a second wall portion of the inner wall of the tube section become located in planes substantially perpendicular to the tube axis. The first wall portion may serve as an engaging surface for an electrode and the second wall portion may serve as an engaging surface for the window. A third drawn wall portion may serve as a reference face of the tube in a device.

REFERENCES:
patent: 2661437 (1953-12-01), Beckers
patent: 2771710 (1956-11-01), Molinari et al.
patent: 2960615 (1960-11-01), Harries
patent: 3005122 (1961-10-01), Coleman et al.
patent: 3290529 (1966-12-01), Kaseman
patent: 3562516 (1971-02-01), Guyot

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