Punching devices
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United States of America Patent
Stats
-
Feb 27, 1990
Issued Date -
N/A
app pub date -
May 16, 1988
filing date -
Nov 24, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A punching device for automatic punching machines for the punching of paper, cardboard and the like, comprising: a driving mechanism for a top shoe; such as a rocking lever drive, elliptical cam drive, or wedge-form transmission; a stationary bottom shoe supporting a counter-punch; a movable top shoe supporting punch knives; and a gripper bar arrangement for intermittent forwarding through the punching device of sheets to be punched wherein the drive mechanism for the top shoe is located between the top shoe and a yoke which is connected with the bottom shoe through prestressed tie rods.
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