摘要:
A photoconductive photosensitive member (2) and a charge retaining medium (1), which face one another at a predetermined interval, are exposed to light while a voltage is applied between them from an external power source (E). The discharge occurring in the exposed areas produces an electrostatic image on the charge retaining medium. In this method, the applied voltage is removed a predetermined time after a shutter (13) is closed so that all the carriers generated in the photosensitive member can be transferred to the charge retaining medium. Accordingly, the quantity of charge corresponding to an exposure quantity is stored in the charge retaining medium irrespective of the kind of the photoconductive member used. If the charge retaining medium or photosensitive member is charged in advance in this case, a positive image can be obtained with the external power source disconnected. Alternatively, the applied voltage may be removed after the photosensitive members are separated from the charge retaining member on which an electrostatic charge image has been formed. In this case, the image is prevented from distortion. On the other hand, if a spacer for keeping the photosensitive member and the charge retaining member in a spaced-apart relation is formed integrally with either the photosensitive member or the charge retaining medium, the discharge gap can easily be kept constant. Further, if the electrode of the photosensitive member or that of the charge retaining medium at a spacer portion is removed, it is effective to prevent dielectric breakdown which may be caused through the spacer.
摘要:
A device for detecting a charge latent image on a recording medium including a photo-modulation member having a composite film of high polymer material and a liquid crystal material dispersed in the polymer material, preferable liquid crystal material having refraction anisotropy higher than 0.18 and droplet size of less than 0.5 micron.
摘要:
Method and apparatus for ion projection electrographic imaging using a self-limiting discharge ion source (10). A pool of ions is generated by a high voltage time-varying potential (17) between two electrodes (14 and 18) separated by a solid dielectric (16); ions are extracted by means of an electrical field between one of the electrodes and a further electrode member (160). An apertured ion-modulating plate (20) is interposed between the ion source (10) and an image receptor surface (150) in order to modulate the cross-section of ion flow, thereby forming a desired electrographic image. This device enjoys the advantages of high print uniformity, simplicity of construction, and reliable, durable operation.
摘要:
An image-forming method includes a step of allowing electrically-conductive light-transmitting particles to adhere electrostatically to the surface of a photo-conductive substrate, a step of exposing the surface to the light of an image above the particles, and a step of separating particles which transmitted the light from those which did not transmit the light, to obtain a particle image formed by either of these groups of particles. The method includes an additional step, which is carried out after to the exposure step, of equalizing the potentials of the particles which transmitted the light, and the potentials of the particles which did not transmit the light. Thus it is possible to eliminate the conventional disadvantage that color purity is reduced in portions of high color density.
摘要:
Provided is an image forming device including a transfer belt moving in a preset direction; a plurality of image generators respectively generating a toner image on the transfer belt; a controller outputting an image generation signal to each of the plurality of image generators such that the plurality of image generators respectively generate a toner image, wherein a plurality of toner images generated using the plurality of image generators are arranged on the transfer belt in parallel to each other, and an arrangement order of the plurality of toner images is identical to an arrangement order of the plurality of image generators.
摘要:
A method and apparatus for the electrostatic printing of dry or wet toners using a novel tiered printing plate allows for superior and efficient transfer of toner from the plate to the printed item. The process for producing the printing plate uses photo polymer film resist with a positive photo tool which after developing yields trenches between ridges of hardened photo polymer which hold the toner in desired pattern.