Method of making a seamless punch

Details Method of making a seamless punch Method of making a seamless punch

1984-09-11

1986-02-11

Meister, James M.

Metal tools and implements, making

Blank or process

Die

72370, 76101R, 83684, B26F 114

Patent

active

045692564

ABSTRACT:
A device for punching holes in paper cards is disclosed and a process for fabricating the device. The hole punching device is formed to be a seamless member which may be shaped to conform to any of a variety of shapes and of various lengths. The device is formed by deforming a length of tubing to conform to the shape of a core die and one or more depressions in the pressurizing surfaces.

REFERENCES:
patent: 1828915 (1931-10-01), Wentworth
patent: 1837524 (1931-12-01), Braden
patent: 2455538 (1948-12-01), Wagner
patent: 3403543 (1968-10-01), Gregory
patent: 4494426 (1985-01-01), Hartzell
patent: 4513601 (1985-04-01), Herbulot

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