Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1984-04-04
1986-04-15
Lutter, Frank W.
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
209403, 209405, B07B 148
Patent
active
045825971
ABSTRACT:
A vibratory screen structure which is rectangular in plan employing pretensioned screen panels and a pneumatic tube seal beneath the panels. Restraining members are positioned on two sides of the screen panels to hold the screen frames in position on the pneumatic tubes when sealed. The remaining sides are unrestrained and bow under the pressure of the pneumatic tubes to create a crown in each screen panel.
REFERENCES:
patent: 2279042 (1942-04-01), Harrington
patent: 3176843 (1965-04-01), Hoskin et al.
patent: 4082657 (1978-04-01), Gage
patent: 4357869 (1982-11-01), Wadstein
Bond William
Lutter Frank W.
Sweco Incorporated
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