Classifying – separating – and assorting solids – Sifting – Plane sifters
Patent
1981-04-15
1983-04-19
Hill, Ralph J.
Classifying, separating, and assorting solids
Sifting
Plane sifters
209403, 209405, 209408, 209412, B07B 148
Patent
active
043804942
ABSTRACT:
A plurality of truss-like supports are secured, as by welding, and in spaced relationship, to the underside of a screen cloth. The supported screen cloth is then removably secured in position in a vibrating frame to form therewith a vibrating screen. Each truss-like support includes a support rod formed of wire rod of predetermined diameter disposed with a major portion thereof spaced from and substantially parallel to the plane of the screen cloth, and with end portions thereof merging into the plane of the end pieces of selected wire rods forming the screen cloth and being welded thereto. A spacer wire, formed from wire rod of a diameter less than that of the support rod and to an approximate sinusoidal configuration, is disposed so that the upper tips, formed by the sine configuration, are welded to the bottom surface of the screen cloth and so that the lower such tips are welded to the upper surface of the support rod.
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patent: 1886173 (1932-11-01), Flint
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patent: 3640386 (1972-02-01), Frangos
patent: 3684091 (1972-08-01), Wehner
patent: 3718963 (1973-03-01), Hawkins et al.
Hill Ralph J.
Litton Systems Inc.
Pollack Morris I.
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