Method of solvent coating with gravure roll in combination with sheathed elastomeric roll and apparatus
AssigneeBurroughs Corporation
InventorWarren F. Harbs
Life of this patent
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Abstract
A preferred embodiment applies ultra-thin solvent base coatings to tape substrates with a "gravure roll" and associated elastomeric applicator roll, the applicator roll being sheathed by a flexible, solvent-resistant sleeve.
Claims22
An improved gravure roll coating arrangement adapted to apply a thin film data recording coating to a prescribed substrate and including gravure roll means, this arrangement including:
- an ensheathed applicator roll interposed between said substrate and said gravure roll means and operatively combined therewith to transfer said film coating therebetween.
In an improved roll coating arrangement for applying ultra-thin films of magnetic recording material to a magnetic tape substrate, the combination comprising:
- a relatively rigid drive roll adapted to advance said tape past a prescribed "application-station";
- gravure roll means adapted to efficiently transfer this magnetic recording material as a surface-deposit, from a source station to a prescribed transfer station;
- and
- ensheathed resilient-surfaced applicator roll means, arranged and disposed to transfer said recording material--as a surface deposit--from said gravure roll means at said "transfer station" to said tape substrate at said "application-station", as an ultra-thin film coating on the passing substrate.
An improved method of applying thin film coatings of a prescribed data recording coating material to a prescribed substrate comprising the steps of:
- advancing said substrate past a prescribed "coating station" in a prescribed manner;
- providing a film of said coating material on the surface of a rotating gravure roll means;
- and
- providing ensheathed resilient roll means between said gravure roll means and said "coating station" to transfer said coating material therebetween as a thin film coating on said substrate.
An improved coating apparatus adapted to deposit a prescribed ultra thin data recording coating from a prescribed supply means onto a moving web substrate, this coating including an organic solvent base, this apparatus comprising, in combination:
- gravure roll means operatively associated with said supply means and adapted to continuously rotate therein and so pickup a transfer coating thereof;
- and
- ensheathed applicator roll means operatively disposed between said gravure roll means and said substrate and adapted to transfer at least some of said transfer coating to the substrate;
- this applicator roll means comprising a resilient elastomeric surface over-fitted with a prescribed thin flexible sleeve means of polymeric material which is relatively inert to reaction with, or degradation by, said solvent base.
Dependencies are inferred from the claim text.