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:
May. 06, 1986
Filed:
Mar. 20, 1985
Oce-Nederland, B.V., Ma Venlo, NL;
Abstract
A copying process in which a pattern of charged and uncharged areas is superimposed on a charge image by charging and exposing image-wise an electrophotographic element which is provided with a charge-transporting top layer having therebeneath a charge-generating layer which can inject charges into the charge-transporting top layer at areas corresponding to said pattern of uncharged areas, but cannot inject charges into the other areas of the charge-transporting top layer. The charge image is developed with a developing powder having a resistivity of less than 10.sup.12 ohms.multidot.cm and the resulting powder image is transferred to a receiving material and fixed thereon. The pattern of charged and uncharged areas is provided to produce a uniform light-grey image where desired.