Pyroelectric direct marking method and apparatus

Details Pyroelectric direct marking method and apparatus Pyroelectric direct marking method and apparatus

1991-04-26

1992-10-06

Fuller, Benjamin R.

Recorders

Electric recording

Electrochemical

346 11, 346 76R, 346 76PH, G01D 1506

Patent

active

051536153

ABSTRACT:
A method and apparatus for printing including the use of a pyroelectric material in a novel fashion to directly mark an image on a print substrate. The image is produced by initially coating a poled pyroelectric material with a uniform coating of charged marking particles and subsequently thermally exposing the pyroelectric material in a localized fashion, thus reversing the polarity of the charge which repels the particles from the surface of the pyroelectric material, and in the direction of the surface of a print substrate placed in close proximity thereto. Subsequently, the image formed by the transferred marking particles is fixed to the substrate by a thermal or other well known fusing treatment.

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D. Dove et al., "High Resolution Resistive Ribbon Printing for Typesetter Application," Journal of Imaging Science, vol. 33, No. 1, pp. 7-10, Jan./Feb. 1989.

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