Direct toner projection printing using an intermediate transfer

Details Direct toner projection printing using an intermediate transfer Direct toner projection printing using an intermediate transfer

1995-10-17

1998-08-18

Yockey, David F.

Incremental printing of symbolic information

Ink jet

Medium and processing means

347117, B41J 201, B41J 2385

Patent

active

057964220

ABSTRACT:
An electrostatic printing apparatus includes a rotating transfer drum having an outer transfer surface. A plurality of direct toner projection units are positioned adjacent the transfer surface of the rotating transfer drum to project toner patterns of different colors onto the transfer surface in response to modulated signals. After the patterns are applied to the drum, they are transferred to paper and fused. The drum is constructed of two components: a base layer or core which is conductive, and a surface layer which is chosen primarily for its surface properties. The surface layer is conductive enough to allow toner particles to dissipate their electrical charges before additional toner is applied by downstream toner projection units.

REFERENCES:
patent: 3781105 (1973-12-01), Meagher
patent: 4733255 (1988-03-01), Rasbury
patent: 4739348 (1988-04-01), Ando et al.
patent: 5121144 (1992-06-01), Larson et al.
patent: 5305026 (1994-04-01), Kazuo et al.
patent: 5353105 (1994-10-01), Gundlach et al.

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