Sleeve for a printing machine cylinder and method of putting this sleeve in place
AssigneeRollin S.A.
InventorsHerve Praet, Jean-Pierre Moscato, Gerard Rich
Life of this patent
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Abstract
A sleeve for a cylinder of a printing, coating or the like machine, comprising in particular a lithographic layer, a compressible layer, a support layer and, between the two last layers, a heat-shrinkable layer for permitting the adaptation of the sleeve to the diameter of a cylinder.
Claims20
An improved cylindrical sleeve adapted to be mounted onto a cylinder of a printing or coating machine of the kind wherein the sleeve comprises an outer layer for printing or coating and one or more inner layers concentric with the outer layer, the improvement characterized in that at least one of said sleeve layers comprises about 10-50 percent by volume of a heat-shrinkable material, whereby said heat-shrinkable material-containing layer is heat shrinkable, said heat-shrinkable layer securing said sleeve to said cylinder once said sleeve is mounted onto the cylinder and heat is applied.
A printing sleeve for a printing cylinder of a flexographic printing machine comprising:
- an external polymeric printing layer;
- an innermost supporting layer;
- a compressible layer;
- and
- a barrier layer formed of heat-shrinkable material disposed between and concentric with the compressible layer and the support layer.
A sleeve for a printing cylinder of a flexographic printing machine comprising:
- an external polymeric printing layer;
- one or more subjacent cylindrical concentric layers, at least one of which is compressible;
- and
- a barrier layer formed of heat-shrinkable material disposed between the polymeric printing layer and the compressible layer, whereby said barrier layer is heat-shrinkable, said heat-shrinkable barrier layer securing said sleeve to said cylinder once said sleeve is mounted onto the cylinder and heat is applied.
A method for mounting a cylindrical printing or coating sleeve onto a cylinder of a printing or coating machine of the kind wherein the machine cylinder has a smaller diameter than the inner diameter of said sleeve, the method comprising the steps of
- providing a cylindrical sleeve comprising an outer layer for printing or coating and one or more inner layers concentric with the outer layer, wherein at least one of said sleeve layers comprises about 10-50 percent by volume of a heat-shrinkable material;
- and
- placing said sleeve onto the machine cylinder;
- and
- heating said sleeve to activate the heat-shrinkable material.
Dependencies are inferred from the claim text.