Oce-nederland B.v.

Robertus Petrus Quirijnen

Pierre A Klerken

Antoon L Hoep

Jozef A Corver

Mike Paul Van Eekhout

A method of and device for recording images on an image-recording medium with a dielectric surface. A voltage is applied in accordance with an image pattern between a set of image-recording electrodes and a companion electrode. Toner powder is deposited on the dielectric surface in accordance with the applied voltage. Image recording is effected by alternately bringing the image-forming electrodes to a positive and negative potential with respect to the companion electrode. According to one specific embodiment, a high-frequency AC voltage is applied during image recording to the companion electrode or at least the image-forming electrodes at times when the latter do not contribute to image forming.

Method of recording images and an image-forming device for application

A printing device for reproducing information, comprising a movable image-forming element having a dielectric surface, an image-forming station including a magnetic roller provided with a rotatable electrically conductive sleeve and a magnetic system within the electrically conductive sleeve, electrodes to generate an electric field between the image-forming element and the magnetic roller in accordance with an information pattern, while an electrically conductive magnetically attractable toner powder is present in an image-development zone formed between the image-forming element and magnetic roller, the magnetic system generating a magnetic field in the image-forming zone and forming the toner powder into a magnetic toner brush and system for providing a well-defined space in the image-development zone between the electrically conductive sleeve and the image-forming element so that no distortion of the magnetic toner brush occurs during image development in the image-development zone.

Growing community of inventors

Venlo, Netherlands

Robertus Petrus Quirijnen