Punch for office use

Details Punch for office use Punch for office use

1982-07-01

1985-02-19

Yost, Frank T.

Cutting

With work immobilizer

Work-stop abutment

83568, 83570, 83588, 83618, B26F 102

Patent

active

044998058

ABSTRACT:
A large punch for piercing a thick bundle of sheets of paper at a time. A gear mechanism is operationally associated with a handle to move vertically a pair of paper holding plates cooperating with a pair of cylindrical piercing blades provided on a base, and thereby reduces the force required for moving the handle for the piercing operation. A base plate, which has a pair of holes each defining a passage for one of the piercing blades, is vertically rotatably supported on the base, and is normally biased upwardly to facilitate removal of the piercing blades from a thick bundle of sheets of paper after it has been pierced. The piercing blades and the paper holding plates are removably attached to the base and the gear mechanism, respectively, so that both of them can be easily changed to new ones if required.

REFERENCES:
patent: 1875720 (1932-09-01), Freeman
patent: 2323431 (1943-07-01), Wales
patent: 3041908 (1962-07-01), Dubats
patent: 3525279 (1970-08-01), Christian
patent: 3661039 (1972-05-01), Lewis
patent: 3677117 (1972-07-01), Cutter
patent: 4046045 (1977-09-01), Stevens

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