Method of refurbishing rotogravure cylinders, rotogravure cylinders and their use
AssigneeParamount International Services Ltd.
InventorIoannis Ioannou
Life of this patent
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Abstract
The rotogravure cylinder comprising a rotary gravure base and thereon a copper engraving layer is refurbished to contain a zinc layer between a gravure base and a layer package suitable for engraving and printing. This layer package for instance comprises a metallic support layer, a copper engraving layer and suitably a protection layer. Deposition of the zinc layer may be tuned for thickness variation, in combination with deposition of the layer package in a fixed thickness.
Claims12
Method of refurbishing a rotogravure cylinder comprising a rotary gravure base and thereon a copper engraving layer, which method comprises the steps of:
- (i) providing the rotogravure cylinder to be refurbished;
- (ii) removing the copper engraving layer, therewith obtaining the exposed rotary gravure base;
- (iii) applying a zinc layer to the exposed rotary gravure base, wherein the zinc layer comprises zinc or a zinc alloy;
- and
- (iv) applying a layer package suitable for engraving and printing, comprising a metallic support layer that contains copper and a new copper engraving layer, wherein the metallic support layer is applied by at least partial melting of deposited copper particles.
Dependencies are inferred from the claim text.