Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1984-03-26
1985-05-21
Welsh, John D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430137, 148 315, 148105, 148 63, G03G 910
Patent
active
045186740
ABSTRACT:
An iron powder developer carrier for electrophotography having at least the outer surface thereof coated with iron oxide. The iron oxide has a particle size of 50 to 200.mu., an apparent density of 1.5 to 2.5 g/cm.sup.3 and a specific surface area of 0.01 to 0.3 m.sup.2 /g.
A process for the preparation of iron powder developer carriers for electrophotography, which comprises the steps of subjecting a starting iron powder to a primary calcination treatment in an inert gas atmosphere without using a binder, pulverizing and classifying said calcination product to prepare an intermediate iron powder, reducing the intermediate iron powder in a reducing atmosphere and washing the intermediate iron powder, and subjecting the intermediate iron powder to an oxidizing calcination treatment.
REFERENCES:
patent: 3093039 (1963-06-01), Rheinfrank
patent: 3278439 (1966-10-01), Blanchette et al.
patent: 3607342 (1971-09-01), Sato
patent: 3615340 (1971-10-01), Fuqua et al.
patent: 3632512 (1972-01-01), Miller
patent: 3838054 (1974-09-01), Trachtenberg et al.
patent: 3849182 (1974-11-01), Hagenbach
patent: 3922381 (1975-11-01), Datta
patent: 3970571 (1976-07-01), Olson et al.
patent: 4030913 (1977-06-01), Wegener
patent: 4125667 (1978-11-01), Jones
patent: 4234168 (1980-11-01), Kajinaga et al.
Kubaschewski, O., et al., Oxidation of Metals and Alloys, Academic Press, p. 1, 1962.
Poster, A. R., Handbook of Metal Powders, pp. 56, 57 (1966).
Nishimura Takeo
Takahashi Nobuo
Tomono Makoto
Watanabe Shotaro
Yamakawa Goichi
Konishiroku Photo Industry Co,., Ltd.
Nilles James E.
Welsh John D.
LandOfFree
Developing material for electrophotography, process for preparat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Developing material for electrophotography, process for preparat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Developing material for electrophotography, process for preparat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1538501