Paper punch apparatus with improved punch element

Details Paper punch apparatus with improved punch element Paper punch apparatus with improved punch element

1988-05-23

1989-05-16

Yost, Frank T.

Cutting

Means to drive or to guide tool

With simple rectilinear reciprocating motion only

83687, 83689, B26F 132

Patent

active

048298670

ABSTRACT:
A paper punch which has a body defining a gap for insertion of the material to be punched and has at least one punch hole at the bottom of the gap and includes guides for guiding a punching element across the gap into the punch hole, also includes at least one cylindrical punching element which is disposed to be guided into the punch hole and has a cutting end with a cutting edge which extends helically along at least one-half of the circumference of the punching element. Preferably the punching element is hollow and is formed from a shaped sheet of metal.

REFERENCES:
patent: 1322876 (1919-11-01), Cameron
patent: 3073199 (1963-01-01), Yerkes
patent: 3125883 (1964-03-01), Wollner

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