Metal working – Means to assemble or disassemble – Means to drive self-piercing work part
Patent
1990-06-04
1991-05-07
Eley, Timothy V.
Metal working
Means to assemble or disassemble
Means to drive self-piercing work part
29432, B23P 1900
Patent
active
050125737
ABSTRACT:
A button applicator for caulking one button element to another button element through a fabric piece, using a punch and a die. When a button element having a different caulking pressure is applied, any adjusting for a resilient force supporting the die is unnecessary. According to a preferred embodiment, a first spring and a second spring are provided between a spring-positioning member and a spring-supporting member so that the first spring is encircled by the second spring and that the top of the first spring is higher than the top of the second spring by a predetermined gap. The movement of the die is conveyed to the springs through a shaft provided between the die and the spring-positioning member. The button element, which has a smaller caulking pressure, is caulked by a resilient force of the first spring. Then, the button element, which has a larger caulking pressure, is caulked by a resilient force of the both springs, after the first spring is compressed to be deformed with a displacement of the gap.
REFERENCES:
patent: Re31737 (1984-11-01), Hafner
patent: 3699626 (1972-10-01), Roth
Eley Timothy V.
Martin R.
Yoshida Kogyo K.K.
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