Abstract: An apparatus in which a developer mix of magnetic carrier granules having toner particles adhering triboelectrically thereto is brought into contact with an electrostatic latent image. The latent image attracts at least a portion of the toner particles thereto. A magnetic belt receives the denuded carrier granules and moves them into position to attract toner particles thereto from the chamber of a storage housing.

Abstract: Apparatus for producing copies of portions of an original document and at least one selectively positioned supplemental document which masks the portion of the original document not reproduced. A copier with an image receiving station is provided. A holding device positions the original document into operative association with the image receiving station. The supplemental documents are placed in a transparent over-lay which is positioned between the holder and the image receiving station. The set-up is such that the supplemental documents are in a position to be reproduced while preventing the corresponding portions of the original document masked by the supplemental documents from being reproduced. A transfer device moves the holding device in a reciprocating motion to place the supplemental documents and the original document in first and second relative positions during first and second copy cycles, respectively.

Abstract: A contact heat fixing apparatus for electrophotographic reproduction machines wherein a heating roll 1 and a pressure roll 2 contact each other while rotating under pressure and an auxiliary heating roll 12 is provided which is engageable with and disengageable from the heating roll 1 and said auxiliary heating roll 12 is heated by means of a heating device 13 to a predetermined temperature and said auxiliary heating roll 12 is contacted under pressure to the heating roll 1 to heat the same when the temperature on the surface of said heating roll 1 falls below a temperature capable of fixing toner.

Abstract: A contacting and heating fixing apparatus comprising a first roll of which the surface has a coating of a heat-resistant material with which a toner image of a material to be fixed comes into contact, a second roll for pressing, heating and fixing the material to be fixed in cooperation with said first roll, and a supply mechanism for supplying an offset inhibitor liquid to said heat-resistant parting material on the surface of said first roll, characterized in that supplying of the offset inhibitor liquid from said supply mechanism is made only at warm-up time of a copier.

Abstract: Silicone rubber is employed as an outer coating material on a fuser member and is applied to the base member by means of a novel construction which prevents the separation of the outer silicone rubber coating from the roll even when silicone oil is applied thereto. The fuser member comprises a base member, a layer of a heat-resistant resin formed on the base member and a layer of a silicone rubber formed on the heat-resistant resin layer, the silicone rubber being vulcanized after the formation of the layer of silicone rubber on the resin layer. A primer layer may be used between the heat-resistant resin layer and the silicone rubber layer.

Abstract: A magnetic brush arrangement having plural magnetic rolls for applying developer material to an electrostatic latent image. One of the rolls is selectively rendered inoperative by the provision of means to remove developer from the roll while concurrently interposing a separator sheet between the inoperative roll and the latent image.

Abstract: Apparatus for vibrating a corotron wire to prevent contamination including piezoelectric means to vibrate the wire. Also disclosed is an activation arrangement for the wire vibrating means including a striker plate movable with a rotating portion of the machine to periodically vibrate the wire. Additional specific configurations for vibrating means are disclosed.

Abstract: A sheet removing device for use in an electrophotographic copying machine which removes unstripped sheets from the photosensitive body by providing feed rollers which rotate in reverse upon a stripping failure to pull the sheet off the photosensitive body by acting on the trailing edge portion of the sheet.

Abstract: An exposure device for a copying machine has a light source unit, and a rail unit for supporting the former rigidly mounted to the machine. The light source unit includes an exposure lamp, a heater for heating the lamp, and a control sensor for energizing the heater until the lamp reaches a proper temperature. The rail unit includes a plate having an elongated exposure aperture therein, an elongated reflecting mirror along one side of the aperture, and a guide rail spaced from the plate along the other side of the aperture. A particular positional relationship must be maintained between the optical system and photoreceptor of a copying machine, the exposure lamp, and the exposure aperture. The present invention allows the light source to be mounted to and dismounted from the machine without disturbing this relationship.

Abstract: A device for preventing movement of an original document on the platen of a copier where the platen reciprocates is disclosed having a protrusion that is adapted to adhere to the platen cover. The protrusion is locatable according to the size of the original document being copied and applies pressure in a concentrated area on the platen or the document to prevent movement of the original document while being copied.

Abstract: In an electrophotographic copying machine of the type in which an original copying platen is mounted at one side of the body of the copying machine with a corner of the platen at the exterior side of the platen adapted for book copying, and in which the scanning starting point of a document exposure lamp which scans the entire platen is from the side of the platen opposite from the corner of the platen, there is disclosed a platen repositionable by movement toward the scanning direction of the exposure lamp to shorten the exposed or scanned area of the platen and to move the edge of a book page on the platen to the copier registration position for copying of the book page onto a smaller copy sheet corresponding in size to the book page rather than the platen size.

Abstract: An apparatus in which an electrostatic latent image is developed simultaneously in two colors. A first portion of the latent image has a potential greater than a first threshold with a second portion thereof having a potential less than a second threshold. The second threshold is less than the first threshold. Particles of a first color are applied to the first portion of the latent image with particles of a second color being applied to the second portion of the latent image. The electrostatic latent image is discharged to a potential less than the second potential and portions thereof having a potential greater than the second threshold by a pre-selected level.

Abstract: A display and printing method using an electrochromic imaging material. The electrochromic material forms a colored image in response to the formation of an image pattern on a photoconductive surface. The electrochromic material is between an electrode and the photoconductive surface when image formation takes place. The image may be utilized in a display device or in printing.

Abstract: Silicone rubber is employed as a coating material on a fuser member and adhered to the base member by means of a novel polysiloxane composition. The novel polysiloxane composition comprises specified quantities of two moieties of organopolysiloxane, an allyl ester of a polybasic acid, an aliphatic salt of a metal, and a silane, and strongly adheres the silicone rubber outer layer to the base member or core even when silicone oil is used as a release agent on the fuser member.

Abstract: A xerographic color reproduction imaging system is disclosed. This color system provides at least a two color image with one exposure and avoids the necessity of employing a registration step. A sensitized photoconductive layer is employed which is charged, selectively exposed and developed with a color toner. The photoconductive layer is then recharged and developed with toner of another color.

Abstract: A multipurpose pallet system is provided which includes a deck means attachable either to a base member or a plurality of base members by shear pin and spring connections providing a yieldable break-away connection. Openings in the deck means receive pallet posts which are useful for supporting side members and for stacking the pallets.

Abstract: A stripping mechanism for removing copy paper from a heated fuser roll includes a first pair of stripping pawls spaced a first distance suitable for optimally stripping copy paper of a first size and a second pair of stripping pawls supported independently from the first pair and spaced a second distance suitable for optimally stripping copy paper of a second size. The first and second pairs of pawls contact the fuser roll at different locations along the circumference thereof.

Abstract: A cartridge tray for use with a copying machine and having pressor pads adapted to be automatically reset to their operative or bias generating position upon positioning the tray in the copy machine.

Abstract: A copying machine includes a system for projecting an image of an original onto a photosensitive member selectively at one of a plurality of magnifications. The projection system includes two lenses. A movable carriage supports the lenses. The carriage is arranged for movement between a first position wherein one of the lenses is operative and a second position wherein the other of the lenses is operative. Adjustable stops are provided for stopping the carriage at the first or second positions. An overcenter device responsive to the movement of the carriage more than half its distance of travel between the first and second positions operates to move and bias the carriage against the stops.

Abstract: An improved metering system is provided for an electrostatic reproduction machine, the latter being capable of operating in either an automatic document handling mode or a manual mode. The system counts the number of originals per job up to a predetermined first number, the total number of originals fed into the machine, and the total number of prints made. What is counted depends on whether the machine is in the automatic mode or in the manual mode and how many prints the machine is programmed to produce.