Seamless screen cylinder with laser cut openings

Details Seamless screen cylinder with laser cut openings Seamless screen cylinder with laser cut openings

1989-12-14

1991-11-12

Jones, W. Gary

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

291638, 162251, 209270, 209273, 209306, 209397, 210415, 210498, 21912167, B01D 3910, B23P 1516

Patent

active

050645374

ABSTRACT:
Screen cylinders, and methods of making the same for use in removing contaminant particles from papermaking stock, have a seamless cylinder body and the openings or slots therethrough are formed by directing a focused laser beam at an outer surface while focusing the beam intermediate the outer an dinner surfaces to form an opening or slot with tapered walls. Wear bars may be applied to the inside surface as a bead of weld material. The seamless cylindrical body is formed by centrifugal casting or by cold roller extrusion.

REFERENCES:
patent: Re31482 (1984-01-01), Noble
patent: 3293708 (1966-12-01), Fruitman
patent: 4017387 (1977-04-01), Hatton et al.
patent: 4317023 (1982-02-01), Gryskiewicz
patent: 4795560 (1989-01-01), Chupka et al.
patent: 4818840 (1989-04-01), Booth
patent: 4885090 (1989-12-01), Chupka et al.
patent: 4901417 (1990-02-01), Chupka et al.
Kaiser Aerospace & Electronics Company, "Seamless Precision Cylindrical Shapes by the Roll Extrusion Process" (undated).

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