Punch

Details Punch Punch

1991-08-02

1993-08-31

Yost, Frank T.

Cutting

Tool engages work during dwell of intermittent workfeed

Work-sensing means to control work-moving or work-stopping...

83684, 83575, 83261, 83372, B26D 520

Patent

active

052399044

ABSTRACT:
A punch is disclosed, which can be used with an automatic paper feeder or a plane paper copier for receiving sheet-like members one by one from such machine and forming punched holes in each sheet-like member at a punching position thereof. A punching member is disposed in correspondence to the punching position for effecting punching with a predetermined stroke. A dimensional strain generated in an electrical-to-mechanical conversion element such as a piezoelectric element or a magnetostriction element is transmitted after enlargement by an enlarging member disposed to surround the element through a movable output terminal and an operation transmission lever to the punching member to cause high speed operation thereof in a predetermined stroke range. High quality punched holes free from curved edges or the like difficiency thus can be formed even in a continuous feed state without holding the sheet-like members stationary for a while.

REFERENCES:
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patent: 3724309 (1973-04-01), Takenaka
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patent: 4579029 (1984-08-01), Sunaga
patent: 4660449 (1987-04-01), LeTarte
patent: 4783610 (1988-11-01), Asano
patent: 4808874 (1989-02-01), Stahlhuth
patent: 4833958 (1987-12-01), Abildgaard et al.
patent: 4860619 (1989-08-01), Yunoki
"Ceramic Green Sheet Puncher Using Multilayer Piezoelectric Actuator", Yoshida et al., 1987.
"Piezoelectric Impact Printhead Utilizing Longitudinal Piezoelectric Effect", Yano et al., 1989.

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