Finishing system with cyclically operable closure control

Details Finishing system with cyclically operable closure control Finishing system with cyclically operable closure control

1975-06-02

1976-06-01

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51313, B24B 3106

Patent

active

039599329

ABSTRACT:
A finishing machine is provided with a closure which is movable to selectively open or restrict a discharge opening for selectively discharging or retaining materials in the tub of the machine. A pneumatic bellows moves the closure toward a discharge restricting position when supplied with pressurized air. The pressure of the air supplied to the bellows is monitored, and if it exceeds a predetermined magnitude before the closure reaches a discharge restricting position indicating that an object has been trapped by the closure, the movement of the closure is stopped, reversed, and reinitiated to release the object and subsequently move the closure to a discharge restricting position.

REFERENCES:
patent: 3449869 (1969-06-01), Rampe
patent: 3694968 (1972-10-01), Isaacson

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