Forming process for a sheet of perforated metal and process impl

Details Forming process for a sheet of perforated metal and process impl Forming process for a sheet of perforated metal and process impl

1992-07-09

1994-04-26

Rowan, Kurt C.

Electric lamp or space discharge component or device manufacturi

Apparatus

Assembly means

445 47, 72 38, 72364, 100938, H01J 914

Patent

active

053061900

ABSTRACT:
A process for forming a color selection mask for a CRT, in a press containing a punch and a counter-punch, after a temperature build-up stage in a shaping chamber, through the circulation of pressurized hot gas injected by inlets placed on the walls of the counter-punch, includes the step of distributing the hot gas through a distribution device to uniformly heat the mask's surface.

REFERENCES:
patent: 3152384 (1964-10-01), Toohig et al.
patent: 3234055 (1966-02-01), Feng
patent: 3345846 (1967-10-01), Hess
patent: 3434910 (1969-03-01), Kannegiesser et al.
patent: 3440858 (1969-04-01), Motley et al.
patent: 4536226 (1985-08-01), Ohtake et al.
patent: 4792318 (1988-12-01), Igaki et al.
patent: 5026312 (1991-06-01), Van Den Berg

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