Screen fabrication

Details Screen fabrication Screen fabrication

1985-01-10

1986-04-29

Henderson, Christopher A.

Metal fusion bonding

Process

Encasing a rodlike core within a substantially coextensive...

291635R, 228133, 2281732, 2281734, B21D 3900

Patent

active

045851565

ABSTRACT:
A laminated, cylindrical, metal screen or molding element for vacuum perforation of plastic film or sheets, comprising two or more relatively thin cylindrical metal screens, each having a predetermined inside and outside diameter and each having a plurality of openings or holes therein of a predetermined size and geometrical shape, and said relatively thin screens stacked and bonded together, diametrically one inside the other thereby providing a screen of a desired thickness and a desired hole geometry wherein the holes in the screen have substantially straight walls perpendicular to the surface of the screen.
A method of producing a relatively thick cylindrical metal screen for vacuum perforation of plastic film or sheets wherein the holes or openings in the screen have substantially straight walls perpendicular to the surface of the screen, comprising stacking and bonding together two or more matched relatively thin metal screens diametrically one inside the other.

REFERENCES:
patent: 3101531 (1963-08-01), Roseberry
patent: 4072787 (1978-02-01), Ricks
patent: 4214945 (1980-07-01), Lucas
patent: 4252516 (1981-02-01), Raley
patent: 4259136 (1981-03-01), Spiewok
patent: 4319868 (1982-03-01), Riemersma

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