Apparatus for safety operating presses and the like

Details Apparatus for safety operating presses and the like Apparatus for safety operating presses and the like

1978-11-27

1980-06-03

Schran, Donald R.

Cutting

With randomly actuated stopping means

Responsive to tool detector or work-feed-means detector

83 63, 83 61, 83 621, B26D 724

Patent

active

042055679

ABSTRACT:
The present invention relates to an apparatus for detecting mis-strippings in a press having a ram and upper and lower tools for punching workpieces. The apparatus comprises an electric circuit which is closed when the ram and the upper tool are in contact with each other. A relay is provided in the electric circuit and is actuated when the ram and the upper tool are brought out of contact with each other when the ram is returning from a bottom dead-center position to a top dead-center position. Also, a contact in the relay is connected with a main circuit for driving the press.

REFERENCES:
patent: 3407913 (1968-10-01), Tezuka
patent: 3728919 (1973-04-01), Scott
patent: 4006655 (1977-02-01), Maurer

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