Method of surface preparation using plasma in air
AssigneeCreo Inc.
InventorDaniel Gelbart
Life of this patent
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Abstract
In accordance with the present invention, a directed plasma beam is employed in air to selectively remove coatings from paper products at high production rates. The shape and intensity of the beam is controlled to obtain a controlled rate of removal of the coating. The method does not require vacuum to be established and allows for the plasma to be generated from high pressure air.
Claims19
A method of removing a layer of material from a substrate, the method comprising:
- providing a substrate having a layer on a surface thereof;
- providing a plasma gun configured to direct a plasma beam at said layer;
- controlling said plasma beam;
- moving said substrate relative to said plasma gun;
- and,
- removing said layer with said plasma beam to expose said surface,
- wherein said substrate is not damaged by said plasma beam, and wherein said substrate is one of the following:
- paper, cardboard, polymeric, natural fiber.
A method of removing a layer of material from a paper-based substrate, the method comprising:
- providing a paper-based or cardboard-based substrate having a layer on a surface thereof;
- and
- directing a plasma beam at the layer and moving the substrate relative to the plasma beam at a rate such that the plasma beam substantially removes the layer in an area of the substrate.
A method of preparing a paper-based substrate for adhesive bonding, said method comprising:
- providing a paper-based substrate having at least one layer on a surface thereof;
- providing plasma beam directed at the at least one layer;
- moving the substrate relative to the plasma beam while allowing the plasma beam to remove the layer to expose the surface in a strip;
- and,
- applying an adhesive to the strip.
A method of preparing a paper-based substrate for adhesive bonding, the method comprising:
- providing a paper-based substrate having a layer on a surface thereof;
- directing a plasma beam at the layer and moving the substrate relative to the plasma beam at a rate such that the plasma beam substantially removes the layer from an area of the substrate;
- and
- applying adhesive to the area.
Dependencies are inferred from the claim text.