Method and apparatus for transfer of toner deposited on image ar

Details Method and apparatus for transfer of toner deposited on image ar Method and apparatus for transfer of toner deposited on image ar

1992-04-02

1994-10-11

Kight, III, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430137, G03G 1314

Patent

active

053546415

ABSTRACT:
To permit transfer of toner particles forming an image from a ferroelectric surface (2) onto a substrate (6), without careful operating constraints, an intermediate or offset cylinder (4, 11) is placed opposite the ferroelectric surface (2) to define a small gap (16) therewith, in the order of between about 0.05 to 0.15 mm. The surface on the offset member, preferably a cylinder, can be either semiconductive or insulating material (5), typically very smooth polyurethane, or a conductive sleeve (14) over an insulating core. The substrate (6) is engaged against the offset cylinder (4, 11) by an impression or counter or transfer roller (7) which is subjected to a high direct current voltage, for example between about 1 kV to 4 kV. Corona elements (24, 23) can be located close to the ferroelectric surface and to the offset cylinder surface, the electrode being energized with reverse polarity to assist in a transfer of toner particles to the intermediate or offset cylinder (4, 11).

REFERENCES:
patent: 5213931 (1993-05-01), Staples et al.

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