Method for removing a cullet of a cathode-ray tube

Details Method for removing a cullet of a cathode-ray tube Method for removing a cullet of a cathode-ray tube

1987-10-28

1988-12-27

Kellogg, Arthur

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65 35, 65 36, 65 56, 65112, C03B 946

Patent

active

047938455

ABSTRACT:
A method for heat sealing an electron gun mount, having a glass stem, into a neck of a cathode-ray tube includes a mount socket for supporting the mount within the neck and a plurality of burners for applying heat to the outside of the neck proximate the stem. The neck softens, thins and then seals to the stem, causing excess neck material that is lower than the stem, known as cullet, to be cut off. Prior to applying heat, a sleeve is disposed around the mount socket within the neck adjacent to the cullet, with a clearance between the sleeve and both the socket and the neck. A vibrating coil is attached to the sleeve for vibrating the sleeve while applying heat to the outside of the neck.

REFERENCES:
patent: 3961929 (1976-06-01), Stockdale
patent: 4165227 (1979-08-01), Nubani et al.
patent: 4373944 (1983-02-01), Glick et al.
patent: 4574008 (1986-03-01), Kobayashi
patent: 4589902 (1986-05-01), Colacello et al.

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