Screen cylinder with reinforcing rings and method of manufacture

Details Screen cylinder with reinforcing rings and method of manufacture Screen cylinder with reinforcing rings and method of manufacture

1998-01-12

2000-02-08

Walsh, Donald P.

Classifying, separating, and assorting solids

Sifting

Elements

210402, 210403, 210498, 210499, 209409, 209412, B07B 149, B03B 1100, B01D 2102

Patent

active

06021905&

ABSTRACT:
A screen cylinder, screen, method of manufacture of the screen cylinder, and method of use of the screen cylinder, allow screen capacity to be maximized without sacrificing screen cylinder strength, and while achieving a clean accepts flow. A screen cylinder is constructed in a conventional manner except that at least one reinforcing ring is permanently fastened (typically by continuous or spot laser or electric beam welding, or direct resistance welding) to at least a majority of (and typically essentially all of) the land areas which separate grooves in a row from each other, at the outlet surface of the cylinder, or at least one spiral ring is applied. In this way effective slot length of screen cylinders may be about 65-90% of the total screen length, compared to only about 45-55% for conventional screen cylinders. The screen cylinders are particularly effective in screening cellulose pulps from the pulp and paper industry.

REFERENCES:
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patent: 1933154 (1933-10-01), Spencer
patent: 1948606 (1934-02-01), Weinig
patent: 3631981 (1972-01-01), Young
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patent: 4410424 (1983-10-01), Chupka et al.
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patent: 5513757 (1996-05-01), Papetti
patent: 5622625 (1997-04-01), Nagaoka
patent: 5823355 (1998-10-01), Abdulmassih et al.
patent: 5954956 (1999-09-01), Litz et al.

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