Flexographic printing roll and means for assembling same
AssigneeM. A. Buckley (Engraving) Limited
InventorsWilliam Paul White, Michael William James Lewis
Life of this patent
Estimating the term…
Abstract
A flexographic printing roll comprising a rigid base tube having perforations in the form of a plurality of small apertures and a circumferentially stretchable, elastomeric, seamless printing sleeve on said tube strained to grip the tube to retain the sleeve securely on the tube; in which there is provided means on the tube to aid the sliding of the sleeve on the tube. The said means may comprise a circumferential seal which can be pressurized to press on the sleeve and expand it. The said means may comprise an expandable metal segment seal. The said means may comprise a tapering sleeve through which means are provided for applying reducing pressures at points along the surface of the tapering sleeve.
Claims6
In a flexographic printing roll comprising a rigid base tube having perforations in the form of a plurality of small apertures and a circumferentially stretchable printing sleeve on said tube strained to grip the tube to retain the sleeve securely on the tube;
- means on one end of the base tube to aid the sliding of the sleeve on the tube, said means comprising apparatus having aperture defining means extending from the inside of the base tube to a point external of the base tube that is not covered by the sleeve when fitted whereby a localized pneumatically applied circumferential strain can be created in the sleeve progressively by pressure in said aperture defining means acting on the sleeve as the sleeve is slid on the tube.
Dependencies are inferred from the claim text.