Sieve plate and process for making it

Details Sieve plate and process for making it Sieve plate and process for making it

1989-01-31

1990-06-12

Jones, W. Gary

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

21912171, 210498, B23P 1500

Patent

active

049321129

ABSTRACT:
A process for forming a filter screen including the steps of forming a plurality of parallel linear grooves in a sheet of metal to a depth of about 0.5 to 1 mm, forming inclined openings in the grooves through the remainder of the sheet by means of a laser beam, the openings having a width of about 0.2 to 1 mm, the inclination of all the openings in a groove being the same direction, the inclination of openings in neighboring grooves being in the opposite direction to create zig-zag pattern, and compressing the sheet to flow metal from the sheet into the openings to make the openings more fine, in the range of 0.05-0.1 mm.

REFERENCES:
patent: 3049796 (1962-08-01), Pall
patent: 3520418 (1970-07-01), Guinard
patent: 4276159 (1981-06-01), Lehman
patent: 4317023 (1982-02-01), Gryskiewicz
patent: 4346761 (1982-08-01), Skinner et al.
patent: 4686877 (1987-08-01), Jaritz et al.
patent: 4795560 (1989-01-01), Chupka et al.

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