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US 4,485,708 AGranted
Punching devices
OwnerAlbert Halff, Manfred Vosseninventors
Life of this patent
Estimating the term…
Abstract
A punching device for automatic punching machines for the punching of paper, cardboard and the like, comprising: impulsion means for a top shoe; such as an eccentric cam drive; a stationary bottom shoe supporting a counterpunch; 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 impulsion means for the top shoe is located between the top shoe and a yoke which is connected with the bottom shoe through prestressed tie rods.
Claims9
A punching device for automatic punching machine for the punching of sheet material comprising:
- impulsion means for a top shoe;
- a bottom shoe and a top shoe, wherein one shoe supports punch knives and the other shoe supports a counter-punch, one shoe is stationary and the other shoe is movable to and fro normal to the plane of the counter punch by said impulse means;
- and a gripper bar arrangement for intermittent forwarding between said top and bottom shoes of sheets for punching, wherein the bottom shoe is stationary and the top shoe is moved, and the impulsion means for the top shoe comprise eccentric drive means located between the top shoe and a yoke which is connected with the stationary bottom shoe through prestressed tie rods and said eccentric drive means is adapted to provide a gripper movement period of up to 288.degree. of rotation of said eccentric drive means.
Dependencies are inferred from the claim text.