Device for the fine weeding of a multilayer sheet comprising a support liner and at least one adhesive film coupled with the liner

摘要

The present invention concerns the field of graphic apparatuses and in particular its object is an apparatus for the so-called “weeding” of plastic or paper films having or more self-adhesive, double sided adhesive or electrostatic layers coupled with a support liner treated with a non-stick agent. The apparatus comprises a gripper (3) with a pinching head (8) comprising a plurality of self-centering jaws (16).

主权项

1. A device for the fine weeding of a multilayer sheet comprising a support liner and at least one adhesive film coupled with the liner, the film comprising a plurality of graphic elements peripherally encircled by cuts, and a weed among said graphic elements, the device comprising: a gripper with a pinching head having an axial-symmetric development around a central axis (Z, Z′), the head comprising a plurality of self-centering jaws radially movable close to and away from said central axis (Z), and respective pinching means for pinching and lifting portions of said weed, mounted on said jaws, wherein said pinching means comprise for each jaw respective blocks having front facets, protruding from the each jaw, the front facets of the respective blocks being adapted to mutually contact each other in a closed position of the head, and said front facets having an axial extension such that, in cooperation with a slanting wall of the block, a pyramidal projection is formed with a shaped prismatic tip for gripping the weed.