Process of making a cylindrical slotted sieve for paper pulp strainer
AssigneeE & M Lamort
InventorJean-Pierre Lamort
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Abstract
Cylindrical sieve for paper pulp strainer of the type of thin sheetmetal is formed by juxtaposition of U-shaped sectional elements (2) made from a metal strip. The element (2) has a first flange (3), a bottom (4), followed by a second flange (5) bent over toward the exterior of the U-shaped element on itself so as to define a space (6) in the fold thus formed, intended to receive and hold the first flange (3') of the adjacent element (2'). The base of the U-shaped element is pricked to form depressions or slots.
Claims11
Process of making slots in a sieve element for separating solid material in a liquid stream, comprising the steps of providing a metal strip, forming from said strip an element of generally U-shape having a bottom, a first flange and a second flange each extending from said bottom, positioning said element on a template, pricking the bottom of the element at a regular spacing by a knife having a cutting edge perpendicular to the longitudinal axis of the strip and a wedge-shaped profile one face of which is perpendicular to the pricked surface.
Dependencies are inferred from the claim text.