Title: Multiple applicator roller toner station

Abstract: A method and apparatus for developing an electrographic-latent image on a pre-treated paper medium, by utilizing multiple rollers partially dipped in a liquid carrier. A pre-treated paper medium comprised of a conductively treated paper base supporting a plastic dielectric coating on each of its sides, is positioned between electrode assemblies comprised of matrices of a plurality of styli which receive variable information in the form of electronic signals from a data processor, or other equipment and by selectively changing the plurality of styli generating a latent electrographic image of alphanumeric characters or other variable printing by electrostatic discharge on the paper which is retained by the coating. The latent image is developed, i.e., made visible, by subjecting the paper medium to charged toning particles suspended in a liquid toning carrier. Multiple rollers, one each at predetermined locations, are partially submerged in a liquid toning carrier and pick up sufficient toning so as to form a meniscus between the upper portions of each roller and the paper medium. The image is then fixed i.e., made permanent by vaporizing the liquid carrier with heat.

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Inventors: Lakhani, Kishor M. (Oklahoma City, OK, US)

Application Number: 839715
Filing Date: 1977-10-05
Publication_date: 1979-02-27
Assignee: Honeywell Information Systems Inc. (Waltham, MA)
Primary Class(es): 399/239 101/DIG37, 399/241, 399/249
Other Classes:
US Patent Ref:

3256855	Jun, 1966	Oliphant	118/661.
3367791	Feb, 1968	Lein	118/661.
3596635	Aug, 1971	Smitzer	118/661.
3774574	Nov, 1973	Sato et al.	118/651.
3816114	Jun, 1974	Fukushima et al.	118/651.
3817212	Jun, 1974	Fukushima et al.	118/661.
3893417	Jul, 1975	York	118/661.

Other Refs:
Primary Examiner: Schroeder, Werner H.
Assistant Examiner: Falik, Andrew M.
Attorney: Prasinos; Nicholas, Reiling; Ronald T.