Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1984-01-30
1985-10-29
Goodrow, John L.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
118657, G03G 1509
Patent
active
045500681
ABSTRACT:
A magnetic brush developing apparatus is described which comprises a vertically positioned magnetic supply roll, a similarly positioned magnetic developer roll, and supply means such as a hopper for supplying magnetically attractable developer particles to the lower portion of the supply roll. The supply roll is provided with a magnetization pattern in which the magnetic poles are arranged in helical bands with respect to the roll axis. The developer roll has a symmetric magnetization pattern in which the magnetic poles are arranged in straight linear bands parallel to the roll axis. Developer particles move circumferentially and vertically upward on the surface of the supply roll and are transferred to the surface of the developer roll across a narrow vertical gap separating the two rolls. A doctor blade associated with the supply roll returns excess developer from the supply roll to the hopper. A second doctor blade associated with the developer roll, and positioned in proximity to the gap separating the supply roll from the developer roll, removes excess developer from the developer roll and allows the developer so removed to be magnetically attracted back to the supply roll. The developer is thus continually recirculated between the supply roll and developer roll, and between the supply roll and the supply hopper, with the net amount of developer removed from the hopper being equal to the amount transferred to the recording medium by the developer roll.
REFERENCES:
patent: 2786439 (1957-03-01), Young
patent: 2832311 (1958-04-01), Byrne
patent: 3015305 (1962-01-01), Hall et al.
patent: 3098765 (1963-07-01), Keller et al.
patent: 3113042 (1963-12-01), Hall
patent: 3196831 (1965-07-01), Sugarman, Jr.
patent: 3306193 (1967-02-01), Rarey et al.
patent: 3358594 (1967-12-01), Thompson
patent: 3437074 (1969-04-01), Hagopian et al.
patent: 3557751 (1971-01-01), Kushima et al.
patent: 3572922 (1971-03-01), Olden
patent: 3621779 (1971-11-01), Carl et al.
patent: 3633545 (1972-01-01), Samaniego
patent: 3640247 (1972-02-01), Mason et al.
patent: 3643311 (1972-02-01), Knechtel et al.
patent: 3664299 (1972-05-01), Shaler et al.
patent: 3759367 (1973-09-01), Elliott
patent: 3777707 (1973-12-01), Hodges
patent: 3834350 (1974-09-01), Hodges
patent: 3952857 (1976-04-01), Nazuka
patent: 4051484 (1977-09-01), Martin
patent: 4067296 (1978-01-01), Sessink
patent: 4139296 (1979-02-01), Ruckdeschel
patent: 4155328 (1979-05-01), Navone
patent: 4155329 (1979-05-01), Tsukamoto et al.
patent: 4170287 (1979-10-01), Edwards et al.
patent: 4185130 (1980-01-01), Edwards et al.
patent: 4230069 (1980-10-01), Aldea et al.
patent: 4252434 (1981-02-01), Nakamura et al.
patent: 4254203 (1981-03-01), Oka et al.
patent: 4282303 (1981-08-01), Bergen
patent: 4297969 (1981-11-01), Torigai
patent: 4304192 (1981-12-01), Mayer
patent: 4318606 (1982-03-01), Buholtz et al.
Brooks Jeffrey B.
Larson Warren M.
Goodrow John L.
Markem Corporation
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