Two-stroke machine for making buttons having coplanar shell...

Details Two-stroke machine for making buttons having coplanar shell... Two-stroke machine for making buttons having coplanar shell...

2005-09-06

2005-09-06

Banks, Derris H. (Department: 3725)

Button making

Miscellaneous

C079S001000

Reexamination Certificate

active

06938518

ABSTRACT:
A machine manufactures buttons having coplanar shell flanges in a two-stroke operation. The machine comprises a crimp die having different resistances to advancement of a ram. The first resistance enables a metal shell margin to partially bend under a flat back that is placed on a first surface of the crimp die. The second resistance enables the shell wall to completely bend against a second surface of the crimp die so as to form flanges that lie in a single plane. Both round and rectangular buttons are manufacturable using the same basic machine. The rectangular machine uses a shifter cage on the ram that rotates in response to indexing a die table on which the crimp die and a pickup die are attached. The round machine uses a rotatable frame on the ram. With the rectangular machine, the shell is initially bent during a pickup stroke of the ram.

REFERENCES:
patent: 4867013 (1989-09-01), Braunberger
patent: 6038944 (2000-03-01), Braunberger
3 sheets from web site of Badge Parts Company printed Jan. 17, 2000.
Tecre Owner's Manual printed 1988, revised 1992 pp. 42-48.

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