Abstract: A record sheet cutter control device which can cut a record sheet after a normal record sheet feeding operation has completely been stopped. The device comprises means for involving a difference in time between a signal for stopping the operation of a record sheet feed roller and a signal for starting the operation of a cutter.

Abstract: A wet developing stationary electrode for wet-developing an electrostatic latent image produced on a record sheet. The electrode is provided at that surface thereof which is opposed to the electrostatic latent image produced surface of the record sheet with a number of strip-shape electrodes acting as developing electrodes and extending along two directions symmetrically inclined with respect to the advancing direction of the record sheet, the rear ends of the strip-shaped electrodes, viewed in the advancing direction of the record sheet, being divergent toward the front ends thereof.

Abstract: A device for developing an electrostatic latent image produced on a record sheet by means of electrically charged particles dispersed in a developing liquid. The device comprises at least one pair of developing and squeezing rollers and a plate-shaped perforated fixed electrode. The rollers are arranged in a path along which travelled the record sheet and the fixed electrode is arranged in front and at the rear of the rollers.