Apparatus and method for selectively coating a substrate in strip form
AssigneeLeybold Aktiengesellschaft
InventorSiegfried Kleyer
Life of this patent
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Abstract
A drum is provided on its surface with depressions corresponding to the portions of a web not to be coated and is partially enclosed by a chamber in which separating agent is evaporated. The depressions capture vapor as the drum is rotated, and the web is passed over the drum where it is not enclosed by the chamber. Separating agent condenses on selective of the web correspond to the depressions, and a functional coating is subsequently applied. Thereafter the functional coating is removed from the areas where the separating agent was applied.
Claims13
Apparatus for selectively coating a web, said apparatus comprising
- a chamber,
- a source of vaporized separating agent in said chamber,
- a rotatable drum having a cylindrical surface which is partially enclosed by said chamber and partially exposed from said chamber, said surface having a pattern of depressions which collect vaporized separating agent as said surface rotates through said chamber,
- sealing means for retaining excess vaporized separating agent in said chamber,
- means for passing a web over said partially exposed surface as said drum is rotated, whereby vaporized separating agent can condense on selective areas of said web corresponding to said depressions, and
- means for coating said web including said selective areas.
Method for selectively coating a web, comprising
- providing a chamber,
- providing a rotatable drum having a cylindrical surface which is partially enclosed by said chamber and partially exposed from said chamber, said surface having a pattern of depressions,
- exposing said partially enclosed surface in said chamber to a vaporized separating agent,
- rotating said drum so that said surface has a surface speed,
- moving a web past said partially exposed surface synchrously with said surface speed so that vaporized separating agent condenses on selective areas of said web corresponding to said depressions.
Dependencies are inferred from the claim text.