Claims
- 1. An apparatus for punching holes in a moving metal strip comprising: a housing, a slide block having a female die, an incline plane surface located on the slide block to provide a stop surface, a punch block having a male die, a four bar linkage to extend between the housing and the punch block to allow rotation of the punch block and the linkages located in starting position to contact the stop surface means for advancing the slide block with stop surface in syncronism with the travel of a metal strip to be punched, pneumatic means for continually seeking to rotate the punch block, means for providing auxiliary power for driving the punch block during actual punching, means for moving the slide block back to starting position, and means for timing rotation of the punch block for permitting the slide block to be in starting position before the punch block returns.
- 2. An apparatus as in claim 1 wherein the means for providing auxiliary power for driving the punch block comprises a transverse drive member on the sliding block located to contact and move against the punch block as the sliding block advances.
Parent Case Info
This is a division of application Ser. No. 251,689, filed Apr. 6, 1981 now abandoned; which is a divisional of then copending application Ser. No. 34,808 filed Mar. 30, 1979 and now U.S. Pat. No. 4,277,868.
US Referenced Citations (4)
Divisions (2)
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Number |
Date |
Country |
Parent |
251689 |
Apr 1981 |
|
Parent |
34808 |
Mar 1979 |
|