Coulter Stork Patents B.v.

Theodorus P Louwers

Julia M Alston

Antonius B Koenders

A device is described for developing a latent electrostatic image which is present on a surface, for example a photoconductor surface. The device has one or more regions of a first type having relatively large dimensions and one or more regions of a second type having relatively small dimensions, both dimensions being measured parallel to the direction of relative movement of the device with respect to the image surface. The regions described may be separately and independently supplied with electric potentials. A method is described for developing a latent electrostatic image with use of a device according to the invention whereby energizing of the first and second type regions is carried out in accordance with developer-density and/or contrast requirements.

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Boxmeer, Netherlands

Theodorus P Louwers