Automatic punch

Details Automatic punch Automatic punch

1978-09-25

1980-07-01

Watson, Robert C.

Cutting

Means to drive or to guide tool

With means to connect or disconnect tool and its drive

B26D 716

Patent

active

042100488

ABSTRACT:
An automatic punch for paper or the like includes a plurality of punch heads that are driven as cam followers into a punching position by a cam shaft mounted for rotation about an axis transverse to the movement of the heads. Energy for the punching action is stored in a rapidly rotating flywheel. The energy is quickly transmitted to the cam shaft through a fast-acting single-turn wrap spring clutch mounted co-axially with the cam shaft and the flywheel. The clutch is simply activated by a mechanical escapement which provides positive engagement and release of the clutch in a single turn of the cam shaft. A small, inexpensive electric motor brings the flywheel to speed through a simple pulley and belt drive. The motor also provides the torque to bring the flywheel back to speed after each punch.

REFERENCES:
patent: 3022000 (1962-02-01), Millis
patent: 3387526 (1968-06-01), Neilsen
patent: 3613491 (1971-10-01), Kahmann

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