Hole punch with quick-change die assembly

Details Hole punch with quick-change die assembly Hole punch with quick-change die assembly

1996-03-05

1998-06-30

Jones, Eugenia

Cutting

Means to drive or to guide tool

With means to connect or disconnect tool and its drive

83618, 83628, 83687, 8369891, B26F 114

Patent

active

057717680

ABSTRACT:
Embodiments of an punch machine are shown and described, each comprising a quick-change die assembly. The die assembly may be quickly installed and removed from the punch machine, without bolting or unbolting of either machine housing or the die assembly itself. The die assembly is slid into the machine through a hole in the machine housing and into a position which mates part of the die assembly with the push-bar. A clamp, with a handle outside the machine, is then pivoted against the die assembly. The push-bar is adapted to be self-supporting without being bolted to the die assembly, keeping the push-bar in place without manual adjustment and alignment. The die assembly preferably includes a die, pin retainer, and punch pins, but does not require additional structure to secure the pins to the retainer or to connect the die and retainer. The die assembly preferably includes a system for consistent referencing between various die assemblies, for reducing the instances in which the paper stop must be adjusted when a die assembly is changed.

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