US 4,044,884 AGranted

Apparatus for orienting a flat workpiece

AssigneeVEB Polygraph Leipzig Kombinat fur Polygraphische Maschinen und Ausrustungen

InventorJosef Opletal

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Abstract

An apparatus for orienting a flat workpiece has upper and lower hubs rotatable on a support about respective spaced-apart upper and lower rotation axes. Respective radially extending elongated upper and lower arms are mounted on the upper and lower hubs and carry respective upper and lower levers pivotal on these arms about respective upper and lower pivot axes parallel to the upper and lower arms at locations thereon spaced from the upper and lower rotation axes. Respective upper and lower workpiece-engaging needles are mounted on the upper and lower levers at substantially like spacings from the upper and lower rotation axes. Each lever is pivotal between an operative position with the respective needle engageable with the workpiece and an inoperative position unengageable with the workpiece and can be locked in the operative position by locking means. Upper and lower cam followers on the upper and lower levers are engageable respectively with an upper cam on the second arm and a lower cam carried on the support. Each cam follower is only engageable with the respective cam in a position wherein the two arms extend parallel to and one immediately above the other. A plurality of such upper arms may be provided on the upper hub and a plurality of such lower arms on the lower hub, with each lower arm carrying a respective upper cam, but only one lower cam being provided on the apparatus.

Claims10

Dependent claims

An apparatus for orienting a flat workpiece, said apparatus comprising:

a support;
first and second hubs rotatable on said support about respective spacedapart first and second rotation axes;
respective radially extending elongated first and second arms mounted on said first and second hubs;
respective first and second levers pivotal on said first and second arms about respective first and second pivot axes parallel to said first and second arms at locations thereon spaced from said first and second rotation axes;
respective first and second workpiece-engaging elements mounted on said first and second levers at substantially like spacings from said first and second rotation axes, each lever being pivotal between an operative position with the respective element engageable with a workpiece and an inoperative position unengageable with a workpiece;
respective first and second cam followers on said first and second levers;
a first cam on said second arm engageable in a predetermined angular position of said first and second arms with said first cam follower to pivot said first lever from its inoperative into its operative position;
a second cam on said support engageable in said predetermined angular position of said arms with said second cam follower to pivot said second lever from its inoperative into its operative position;
respective first and second locking means on said arms each operable for maintaining the respective levers in their operative positions for a predetermined angular travel of the respective lever from said predetermined position;
and means for rotating said hubs about their rotation axes in the same direction.

7 more elements

Dependencies are inferred from the claim text.