Patent · US Expired

Carriers doubly coated with metal oxide and intended for electro-photography

US5534378A · kind A · utility

2Cited by

5References

5Claims

0Family size

Assignee

BASF SE

Inventors

Jorg Adel · Ludwigshafen, DE
Rainer Dyllick-Brenzinger · Speyer, DE

Key dates

Filing date	Mar 23, 1995
Grant date	Jul 9, 1996
Priority date	—
Expiry date	Mar 23, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG03G9/1075
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Carriers for electrophotography, based on magnetic cores coated with different metal oxides, have A) a first layer which essentially consists of electrically insulating metal oxide and B) a second layer which essentially consists of metal oxide controlling the electrostatic charging of the toner and which does not substantially decrease the electroresistance of the carriers, which resistance is provided by the layer (A).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.