Apparatus and method for weeding a multilayer sheet comprising a support liner and at least one adhesive film coupled with the liner
AssigneeEsanastri S.R.L.
InventorsRoberto Posarelli, Giuliano Vegni, Cesare Stefanini, Federico Carnasciali, Giorgio Dinelli, Andrea Di Lupo
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Abstract
The present invention concerns the field of graphic apparatuses and in particular its object is an apparatus and a relative method 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 analysis and cutting means adapted to map and execute weeding assisting cuts.
Claims32
A weeding apparatus for 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 apparatus comprising:
- a sheet support plane defining a sheet feeding direction (X);
- a fine weeding device adapted to work on said plane to individually remove parts of the weed delimited by respective closed cut boundaries;
- a rough weeding device adapted to remove in a single passage a unitary main part of the weed;
- and control means adapted to acquire and/or receive and/or store information on the shape and distribution on said sheet of said weed parts delimited by closed cut boundaries, and to control the operation of said fine weeding device as a function of said information, the apparatus further comprising or being associated to weed analysis means and cutting means for analyzing the shape and distribution of said graphic elements, said analysis and cutting means being adapted to transmit said information to said control means, wherein said analysis and cutting means are adapted to map and execute weeding assisting cuts that cut the same weed intersecting with one or more edges of said graphic elements.
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A method for 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 method comprising:
- singularly removing parts of the weed delimited by respective closed cut boundaries;
- removing in a single passage a unitary main part of the weed external to said parts delimited by respective closed cut boundaries;
- acquiring and/or receiving and/or storing information on the shape and distribution on said sheet of said weed parts delimited by closed cut boundaries, and removing singularly the weed parts delimited by closed cut boundaries as a function of said information, wherein the shape and distribution of said graphic elements are analyzed, and weeding assisting cuts that cut the same weed intersecting with one or more edges of said graphic elements are executed on the weed.
Dependencies are inferred from the claim text.