Patent · US Expired

Particulate toner material containing charge controlling compound

US5188919A · kind A · utility

7Cited by

2References

12Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Jean-Marie Dewanckele · Drongen, BE
Serge Tavernier · Lint, BE
Jean-Pierre Ghekiere · Lint, BE

Key dates

Filing date	Aug 13, 1991
Grant date	Feb 23, 1993
Priority date	—
Expiry date	Aug 13, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S525/934
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Particulate toner material for use in the development of latent electrostatic images, wherein said particulate toner material is capable of acquiring by triboelectric contact electrification a net negative charge and contains thermoplastic resin(s) as binder in combination with a colorant and a compound capable of imparting a negative charge to the particulate toner material in contact electrification, wherein the latter compound is an anthranilic acid derivative comprising a sulfonamido-group.

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