Printing – Antismut device – Anti-offset material application
Patent
1975-09-18
1977-09-20
Burr, Edgar S.
Printing
Antismut device
Anti-offset material application
101DIG13, 346153, B41M 122
Patent
active
040489213
ABSTRACT:
A belt of flexible metal with a dielectric of good electrostatic charge retention properties bonded to it is guided over grounded metal rollers with the metallicized side in contact with the rollers. At an imaging station an electrostatic image is placed directly on the dielectric.
As the belt moves past a toning station it is sprayed with an insulating fluid containing small particles of high dielectric constant, which thereby obtain an induced dipole moment, or particles with a permanent dipole moment may be used. These particles are suspended in an organic carrier which is chosen so as not to discharge the dielectric belt and to impart a negligible electrostatic charge to the particles.
Then the developed image is moved past a station wherein a dielectric roller is used as a backup, and a sheet of plain paper is pressed between the belt and the roller to transfer the wet particles from the belt to the paper.
Because the image charge is never neutralized or electrostatically degraded, the belt can be developed and used to print new images many times without having to replace the image charge.
REFERENCES:
patent: 2919170 (1959-12-01), Epstein
patent: 3012839 (1961-12-01), Epstein et al.
patent: 3519461 (1970-07-01), Stowell
patent: 3804511 (1974-04-01), Rait et al.
Addressograph-Multigraph Corporation
Burr Edgar S.
Pyle Ray S.
Suter R. E.
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