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US 2003/0115754 A1Published application
Method for making a mechanical screen cylinder
AssigneeJohnson Filtration Systems Inc.
InventorReig Raphael
Life of this patent
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AssigneeJohnson Filtration Systems Inc.
InventorReig Raphael
Estimating the term…
The method of manufacturing a mechanical basket (P) of substantially cylindrical shape for centripetal or centrifugal flow relative to an axis (R) and comprising rings (A) lying in planes perpendicular to the axis of revolution and wires (F) rigidly connected to the rings at regular intervals for the purpose of sieving a material is characterized in that assembling a wire (F) to a ring (A) comprises a first operation of putting said wire (F) into position in a corresponding notch (EN) in the ring, and a second operation in which the wire is welded to the ring by melting a shoulder (EP1) of the ring, without adding any filler metal. In the method, a mechanical basket is made that presents better mechanical characteristics so that its lifetime is increased, and its cost of manufacture is reduced compared with conventional mechanical baskets.
1/ A method of manufacturing a cylindrical mechanical filter basket (P) for centripetal or centrifugal flow, the basket comprising metal rings (A) spaced apart along an axis (R) of the basket and wires (F) regularly spaced apart from one another and disposed around the periphery of the rings (A) to form a cylindrical sieve, the method being characterized in that it consists in:
2/ The method of claim 1, in which shaped rings (A) are provided each having a top face with a first annular shoulder (EP1) and a bottom face with a second annular shoulder (EP2), and in which said heat source is moved along both shoulders in order to weld each wire to both faces of the ring.
3/ The method of manufacture of claim 1 or claim 2, in which wires (F) are positioned each having a cross-section that includes a root-forming portion (PI) which is inserted into corresponding notches of the rings (A).