Method of manufacturing frame for cathode ray tube

Details Method of manufacturing frame for cathode ray tube Method of manufacturing frame for cathode ray tube

1997-02-20

1998-09-29

Crane, Daniel C.

Metal deforming

With cutting

By shearing tool-couple

72339, B21D 2810

Patent

active

058132716

ABSTRACT:
A method of manufacturing a frame for cathode ray tubes includes the steps of blanking a workpiece while keeping junctions thereon and punching a transformable area of the workpiece to form pilot holes thereon, piercing the blanked portion into a TV or monitor screen shape, forming the edge of the screen-shape portion such that it bends inward, and drawing the formed portion to be molded into a frame while notching the junctions. The steps are performed in one press simultaneously or sequentially.

REFERENCES:
patent: 4356719 (1982-11-01), Sutherland
patent: 5247825 (1993-09-01), Erickson

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