Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1991-12-19
1993-03-02
Martin, Roland
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430108, 430122, 252 6263, G03G 9107, C04B 3526
Patent
active
051908425
ABSTRACT:
Disclosed is an interdispersed two-phase ferrite composite which comprises, as a ferromagnetic phase, a magnetically hard ferrite material having a hexagonal crystalline structure of the general formula MO.6Fe.sub.2 O.sub.3 in which M is selected from the group consisting of strontium, barium, lead and mixtures thereof exhibiting a coercivity of at least 300 Oersteds when magnetically saturated and an induced magnetic moment of at least 20 EMU/g when in an applied magnetic field of 1000 Oersteds and, as a ferroelectric phase, a ferroelectric material comprised of at least one of the double oxides of titanium, zirconium, tin, hafnium or germanium and either an alkaline earth or lead or cadmium, in which the mole ratio of the ferromagnetic phase to the ferroelectric phase is from about 1:1 to about 1:4.
Also disclosed are carrier particles formed from magnetized particles of the composite which optionally can be polymerically coated, an electrostatic two-component dry developer composition comprising electrically insulative charged toner particles mixed with oppositely charged carrier particles formed from magnetized, and optionally polymerically coated, particles of the composite suitable for extremely high speed copying applications without the loss of copy image quality, and a method of developing an electrostatic image by contacting the image with a two-component dry developer composition described above.
REFERENCES:
patent: 3053770 (1962-12-01), Counts
patent: 3713819 (1973-01-01), Hagenbach et al.
patent: 3716630 (1973-02-01), Shirk
patent: 3725283 (1973-04-01), Fenity
patent: 3795617 (1974-03-01), McCabe
patent: 3795618 (1974-03-01), Kasper
patent: 3893935 (1975-07-01), Jadwin et al.
patent: 3938992 (1976-02-01), Jadwin et al.
patent: 3941898 (1976-03-01), Sadamatsu et al.
patent: 4076857 (1978-02-01), Kasper et al.
patent: 4124385 (1978-11-01), O'Horo
patent: 4124735 (1978-11-01), O'Horo
patent: 4126437 (1978-11-01), O'Horo
patent: 4336173 (1982-06-01), Ugelstad
patent: 4341684 (1982-07-01), Kubo et al.
patent: 4394430 (1983-07-01), Jadwin et al.
patent: 4407721 (1983-10-01), Koike et al.
patent: 4459378 (1984-07-01), Ugelstad
patent: 4473029 (1984-09-01), Fritz et al.
patent: 4546060 (1985-10-01), Miskinis et al.
patent: 4623603 (1986-11-01), Iimura et al.
patent: 4764445 (1988-09-01), Miskinis et al.
patent: 4806265 (1989-02-01), Suzuki et al.
patent: 4824587 (1989-04-01), Kwon et al.
patent: 4855206 (1989-12-01), Graalman et al.
patent: 4885205 (1989-02-01), Wahl et al.
patent: 4957812 (1990-09-01), Aoki et al.
patent: 5061586 (1991-10-01), Saha et al.
patent: 5104761 (1992-04-01), Saha et al.
patent: 5106714 (1992-04-01), Saha et al.
Mutz Alec N.
Saha Bijy S.
Zeman Robert E.
Eastman Kodak Company
Martin Roland
Montgomery Willard G.
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