Doctor blade
AssigneeBTG Eclepens S.A.
InventorsJaime Perez, Philippe Crevoisier, Silvano Freti
Life of this patent
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Abstract
A doctor blade for direct contact with a ceramic roll surface. The doctor blade includes a strip of metallic carrier material, which, along one edge section is provided with a ceramic coating. The ceramic coating on the blade has a hardness ranging from approximately 850 to 950 microvickers, thereby substantially increasing wear resistance of the blade without substantially increasing wear on the ceramic roll surface for which the blade is adapted for use.
Claims20
A doctor blade for use on a thermally sprayed and subsequently laser engraved ceramic roll surface, said doctor blade comprising:
- a strip of metallic carrier material, one edge section of said strip being provided with a ceramic coating, said ceramic coating having a hardness ranging from approximately 850 to 950 microvickers, thereby substantially increasing wear resistance of said blade without substantially increasing wear on the ceramic roll surface on which said blade is adapted for use.
A doctor blade unit for use with a thermally sprayed and subsequently laser engraved ceramic roll surface, said unit comprising:
- a doctor blade holder carrying two oppositely and toward each other directed doctor blades, each said doctor blade including a strip of metallic carrier material, one edge section of said strip being provided with a ceramic coating, said ceramic coating having a hardness ranging from approximately 850 to 950 microvickers, thereby substantially increasing wear resistance of said blade without substantially increasing wear on the ceramic roll surface on which said blade is adapted for use;
- wherein one said blade is adapted for a trailing position and the other said blade is adapted for a butting position with the ceramic roll surface, for thereby defining an inking chamber together therewith.
Dependencies are inferred from the claim text.