Riddle with locked-in screen

Details Riddle with locked-in screen Riddle with locked-in screen

1978-02-27

1980-04-22

Halper, Robert

Classifying, separating, and assorting solids

Sifting

Elements

209355, B07B 146

Patent

active

041994426

ABSTRACT:
A riddle is provided with a molded plastic rim having integral upper and lower thickened flanges and a screen with a downwardly extending peripheral edge that is received within a recess in the lower flange and wherein the recess is so configured, arranged and dimensioned to accept cement deposited therein for positively locking the screen to the lower flange of the rim.

REFERENCES:
patent: 1104773 (1914-07-01), Bradshaw
patent: 1170893 (1916-02-01), Graham
patent: 2432889 (1947-12-01), Herrmann
patent: 2587498 (1952-02-01), Marsh
patent: 2738914 (1956-03-01), Hatch
patent: 2879917 (1959-03-01), Flack
patent: 2886481 (1959-05-01), Suan
patent: 3047153 (1962-07-01), Zelinski
patent: 3358879 (1967-12-01), Mueller
patent: 3374888 (1968-03-01), Volpert
patent: 3386580 (1968-06-01), Grabarczyk
patent: 3462328 (1969-08-01), Buckland
patent: 3503172 (1970-03-01), Beguin
patent: 3596597 (1971-08-01), Fountain

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