Process for coating surfaces made tacky beforehand
AssigneeE. I. Du Pont de Nemours and Company
InventorsDietmar Dudek, Reiner Stoll, Thomas Pfeiffer, Robert W. Hooley
Life of this patent
Estimating the term…
Abstract
Process for coating tacky surface areas of an object, e.g., polymer surfaces making tacky areas by irradiation, commprising bringing particulate coating material, e.g., pigments, metals, etc., into contact with the tacky surface areas, and removing excess particulate coating material particularly from non-tacky areas, the particulate coating material being compressed beyond its bulk density by continuous vibration for at least a part of the time the particulate coating material is in contact with the surface to be coated. The process is useful in the preparation of color TV screens, electrical circuits, etc.
Claims17
A process for coating tacky surface areas of a shaped object with particulate coating material comprising:
- (a) bringing the particulate coating material into contact with the surface to be coated containing imagewise tacky surface areas, and (b) removing excess particulate coating material, the improvement wherein the particulate coating material in contact with the surface to be coated is compressed beyond its bulk density by continuous vibration for at least a portion of the time the particulate coating material is in contact with the surface to be coated, and after cessation of contact of the particulate coating material with the surface to be coated, remaining loose particulate coating material is removed from the coated surface.
A process for coating tacky surface areas of a shaped object with particulate coating material comprising:
- (a) bringing the particulate coating material into contact with the surface to be coated containing imagewise tacky surface areas, and (b) removing excess particulate coating material, the improvement wherein the particulate coating material, about 0.5 to 10 .mu.m average particle size, in contact with the surface to be coated is compressed beyond its bulk density by continuous vibration having an amplitude of vibration of 1 to 5 times the particle diameter of the particular coating material for at least a portion of the time the particulate coating material is in contact with the surface to be coated, and after cessation of contact of the particulate coating material with the surface to be coated, remaining loose particulate coating material is removed from the coated surface.
Dependencies are inferred from the claim text.