Photocopying – Contact printing – Light boxes
Patent
1992-08-19
1993-04-20
Moses, R. L.
Photocopying
Contact printing
Light boxes
355271, 355290, G03G 1514, G03G 1520
Patent
active
052047229
ABSTRACT:
A thermo-electric image transfer system (50) for transferring a toned image directly to a paper or transparency medium in the absence of a liquid toner carrier. The medium is fed over a pre-heating platen (52) which drives excess moisture out of the medium. The medium is fed into a nip between first and second transfer rollers (64, 62). The first transfer roller (64) is heated so as to heat the backside of the medium, and includes a thermally and electrically conductive elastomeric layer (64A). A guide element (66) guides the medium out of the nip between the transfer rollers, and into another nip between the first transfer roller (64) and the photoconductor drum (68), with pneumatic cylinders maintaining pressure between the roller and drum. An electrostatic bias voltage is applied to the first roller (64) of a polarity opposite to that of the toner defining the image on the drum (68), to provide an electrostatic attraction of toner to the medium. The heat, pressure and electrostatic fields causes a toner image to be transferred to the medium from the drum (68). The medium is allowed to remain against the drum (68) to allow for cooling and adhesion to the medium, and thereafter is detached from the drum, with the image separating at the toner/photoconductor interface.
REFERENCES:
patent: 4518976 (1985-05-01), Tarumi et al.
patent: 5021829 (1991-06-01), Johnson et al.
patent: 5057875 (1991-10-01), Itoh
patent: 5115227 (1992-05-01), Camis
patent: 5136334 (1992-08-01), Camis et al.
patent: 5150161 (1992-09-01), Bujese
patent: 5153656 (1992-10-01), Johnson et al.
patent: 5162854 (1992-11-01), Hilbert et al.
Heath Kenneth E.
Thompson John A.
Hewlett--Packard Company
Moses R. L.
LandOfFree
Thermo-electric transfer system for liquid toner does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Thermo-electric transfer system for liquid toner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermo-electric transfer system for liquid toner will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1529143