Device for drilling holes in a stack of plates

Details Device for drilling holes in a stack of plates Device for drilling holes in a stack of plates

1984-08-02

1986-08-12

Watts, Douglas D.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Having tool-opposing, work-engaging surface

408 1R, 408 72R, B23B 3900

Patent

active

046053441

ABSTRACT:
A device for drilling holes into a stack of plates such as a stack of printed circuit boards, characterized by an arrangement to provide a cover tape beneath a pressure member of a clamping arrangement to be held by the clamping arrangement on the surface of the stack during the drilling operation to prevent damage to the uppermost plate of the stack. The arrangement for providing the tape preferably includes a supply reel, a takeup reel and a feed device and the tape is preferably guided on the pressure member of the clamping arrangement by a guidance groove.

REFERENCES:
patent: 4408934 (1983-10-01), Ohba et al.

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