The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1996
Filed:
Feb. 17, 1994
Nikolaas De Jaeger, Hove, BE;
Guy Damen, Dessel, BE;
Gerhard Winter, Goslar, DE;
Jan Van Havenbergh, Zwijndrecht, BE;
AGFA-Gevaert, N.V., Mortsel, BE;
Abstract
A method for the production of a radiographic screen comprising the following steps: 1) dispersing phosphor particles in an organic liquid in the presence of a charge controlling agent that charges said phosphor particles with a positive or negative net charge, 2) arranging said dispersion between a pair of electrodes, wherein one of said electrodes is or carries a conductive support of said radiographic screen, 3) applying and maintaining between said electrodes a sufficiently high direct current voltage to deposit charged phosphor particles onto said conductive support, and 4) separating said support carrying electrophoretically deposited phosphor particles from said organic liquid, wherein the dispersing of said phosphor particles proceeds by means of an organic surface active compound acting as dispersing agent for said phosphor particles, and said phosphor particles are electrostatically charged through adsorption thereon of ionic components of said organic surface active compound and/or through adsorption of cations or anions stemming from an ionic inorganic compound incorporated in said liquid.