EP 0002238 A1 19790613 - Electrophotographic elements and method for their preparation.
Title (en)
Electrophotographic elements and method for their preparation.
Title (de)
Elektrophotographische Elemente und Verfahren zu ihrer Herstellung.
Title (fr)
Eléments électrophotographiques et procédé pour leur fabrication.
Publication
Application
Priority
- US 85514177 A 19771128
- US 87497178 A 19780203
Abstract (en)
Electrophotographic elements which comprise a photoconductive layer on conducting support, wherein the photoconductive layer contains a electrically insulating binder, a dye and, optionally, and organic photoconductor. The dye is in a "dye-dye interaction" condition which results from contacting the layer with vapors of a solvent for the dye after the layer has been formed. Enhanced photoconductive sensitivity and resolution result from the transformation of the dye into the "dye-dye interaction" condition. Dyes found useful in the formation have the structure <CHEM> wherein Z and Z min independently represent O, Se, or S and X<(-)> represents an anion. The difference between the absorption spectra of the pyrylium salts before and after vapor treatment proves the existance of a "dye-dye-interaction" condition (curve 2) different from the "dye-polymer-interaction" condition (curve 1) of the prior art.
IPC 1-7
IPC 8 full level
G03G 5/06 (2006.01)
CPC (source: EP)
G03G 5/0661 (2013.01); G03G 5/067 (2013.01)
Citation (search report)
- [A] US RE28698 E 19760127
- [A] DE 2221135 A1 19721123 - MITSUBISHI PAPER MILLS LTD
- [A] FR 2105830 A5 19720428 - EASTMAN KODAK CO
- [AD] US 3938994 A 19760217 - REYNOLDS GEORGE A, et al
- [A] US T904032 I4 19721121
- [A] DE 1299226 B 19690710 - MINNESOTA MINING & MFG
- [A] RESEARCH DISCLOSURES, no. 99, July 1972, Abstract no. 9911, Hampshire U.K. "Method for improving image visibility of organic photoconductive elements", pages 43-44.
- [A] DERWENT JAPANESE PATENTS REPORT vol. U, no. 52, Januray 1974, London U.K. Part G, page 5, column 2, paragraph 3; & JP-B-48 043 151 (MATSUSHITA ELECTRIC INDUSTRIAL CO.).
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0002238 A1 19790613; EP 0002238 B1 19840613; CA 1129426 A 19820810; DE 2862416 D1 19840719; JP S5483837 A 19790704; JP S6248214 B2 19871013
DOCDB simple family (application)
EP 78101449 A 19781124; CA 313939 A 19781023; DE 2862416 T 19781124; JP 14615178 A 19781128