Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...
Patent
1991-07-26
1995-05-02
Rodee, Christopher D.
Radiation imagery chemistry: process, composition, or product th
Diazo reproduction, process, composition, or product
Composition or product which contains radiation sensitive...
430111, 252 6754, G03G 9083
Patent
active
054118301
ABSTRACT:
A magnetic developer including magnetic toner particles is formed from a magnetic material containing silicon preferably in an amount of 0.1-1.0 wt. % calculated as SiO.sub.2 and aluminum preferably in an amount of 0.1-1.0 wt. % calculated as Al.sub.2 O.sub.3, respectively based on the magnetic material. The magnetic developer thus produced has both a large triboelectric charge and a sharp distribution of triboelectric charge and is suitable for developing digital latent images by a reversal development scheme. The magnetic developer also has appropriate levels of residual magnetization and coercive force, and characters printed therewith are suitable for magnetic ink character recognition.
REFERENCES:
patent: 4517268 (1985-05-01), Gruber et al.
patent: 4820603 (1989-04-01), Sakashita
patent: 4919727 (1990-04-01), Burow et al.
patent: 5002751 (1991-03-01), Wiese et al.
patent: 5127952 (1992-07-01), Persello et al.
Patent Abstracts of Japan, vol. 12, No. 219 (C-506) [3066 , Jun. 22, 1988.
Canon Kabushiki Kaisha
Rodee Christopher D.
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