摘要:
A rod-like light collector for collecting light reflected from a photoconductive surface bearing a developed image and scanned by a flying spot scanner with a central core of a relatively rigid transparent material encased by a cladding material having an index of refraction lower than that of the core and an outer light diffusing coating, a portion of which is removed to provide a slit-like aperture for receiving light reflected from the photoconductive surface. The shape of the light receiving aperture may be varied uniformly along the length of the collector with the size of the aperture at the center at a minimum. And, a slit-like axial section of the cladding material opposite the light receiving aperture may be replaced by a highly reflecting, light diffusing coating.
摘要:
A combination xerographic/flying spot scanning apparatus wherein xerographic images produced by the xerographic section are scanned following development by the scanning beam of the scanning section to produce image signals or pixels representative of the image scanned. To accommodate changes in the apparatus due to use and wear on the components, a test image is produced in the interdocument area, and following development, scanned by the scanning beam. The signals produced from the test image are utilized to update the threshold level at which image signals produced by the apparatus scanning section are processed.
摘要:
Photoelectrophoretic imaging system having an additional electrode for subjecting a film of photoelectrophoretic imaging suspension to an electric field at a potential above the corona threshold of the film prior to image exposure. The effect of the electric field and resulting current causes electrophoretic deposition of the imaging particles in the imaging suspension in a uniform layer to thereby eliminate or reduce background degradation in the final image formed.
摘要:
An imaging system, method and apparatus for producing an image by sensitizing a charge retentive surface of a photoreceptor, image-wise exposing the charge retentive surface to produce an electrostatic latent image, and then transferring the latent image away from the photoreceptor. An intermediate transfer belt carries the latent image to a proximally located development assembly to accommodate deposit of a toner complex onto the latent image to produce a toned image. The toned image is carried to a proximally located toner image transfer assembly that is located a distance from the photoreceptor. The toned image is transferred or transfused to a media carried by a toner image transfer belt located proximally to the intermediate transfer belt.
摘要:
An apparatus for non-interactive, dry powder development of electrostatic Images composed of solid areas and fine lines areas on an imageable surface including a housing containing developer material; a first magnetic roll, spaced a first predefined distance from the image, for transporting the developer material from the housing to develop solid areas of the image, the magnetic roll including an magnetic core and a cylindrical sleeve enclosing and rotating about the magnetic core; and a second magnetic roll, spaced a second predefined distance from the image, for transporting the developer material from the housing to develop fine line areas of the image, the magnetic roll including an magnetic core and a cylindrical sleeve enclosing and rotating about the magnetic core.
摘要:
A method for supplying custom color in an image development system includes providing selectable color toner liquids on demand to a mixing station; mixing the provided color toner liquids at the mixing station; providing a mist from the mixed toner liquid; transporting the mist to a developer station; passing the mist between a development electrode and a recording member onto which a latent electrostatic image is positioned; providing an electric field between the development electrode and the recording member; and attracting the mist by means of the electric field to the electrostatic image to thereby develop the electrostatic image.
摘要:
A piezographic imaging process includes the use of a composite photoreceptor structure that includes a piezoactive layer that enables Xerographic imaging without corona charge/transfer subsystems. Flexure of the photoreceptor structure creates electric fields sufficient for the creation of developable latent electrostatic image patterns. Flexure of the photoreceptor structure following development generates an electric field for transfer of toner images onto paper.
摘要:
An apparatus in which the developability and interactivity of electrostatically charged particles in a mixture of particulate material is measured. The sensor apparatus includes a transparent member positioned closely adjacent to a developer roller of an electrophotographic printing machine. Electrostatically charged particles are attracted from the particulate mixture being transported by the developer roller to the member. A beam of energy is transmitted through the member. The intensity of the internally reflected beam is detected and a signal generated indicative of the quantity of charged particles adhering to the member. A cleaning field bias is applied, to determine if a signal indicative of the charge particles being removed (interactivity) from the member is generated.
摘要:
A method and apparatus for reproducing color images using a non-interactive pyroelectric imaging process is disclosed. More specifically, the present invention is used to generate multiple layers of toner on the top surface of a pyroelectric imaging member without physical contact to the imaging member top surface. The ability to generate a composite image with different materials in this manner enables printing machines to use a pyroelectric imaging process to generate color images in the image on image (I-O-I) mode.
摘要:
Developed image noise is reduced by momentarily breaking the close range forces holding toner non-uniformly to a charge retentive surface in an electrostatic image. The source of the image noise can be of a mechanical nature, such as, raking by carrier beads in conventional two component development. The short range forces are broken by applying ultrasonic vibration to the charge retentive surface.