Abstract: An apparatus which advances a sheet into registration with information developed on a moving member. A sheet gripper transports the sheet in a recirculating path. The sheet gripper is detachably coupled to the member over a portion of the path of movement thereof to place the sheet in registration with the information developed on the member. Thereafter, the sheet gripper is decoupled from the member to move independently thereof.

Abstract: An apparatus in which images on sheets are fused during a copy run. Heat is applied to at least the images on successive sheets advanced, in seriatim, through a fusing device permanently affixing the images to the sheet. The temperature of the fusing device is detected and a signal indicative thereof transmitted. A controller compares the time derivative of the signal received from the detector at initialization of the copy run to a first constant and energize the heater of the fusing device when the first constant is less than the time derivative of the signal. During the copy run, after the time derivative of the signal is less than the first constant, the controller compares the signal received from the detector to a constant and generates an error signal indicative of the difference therebetween to control the heater of the fusing device.

Abstract: An apparatus in which a plurality of developer rollers develop a latent image recorded on a flexible photoconductive member. The photoconductive belt is deflected by the developer material to wrap around at least a portion of the first two developer rollers forming wrapped development zones. The last developer roller may either have the photoconductive belt wrapped about a portion thereof, or the photoconductive belt may remain in an undeflected condition. The developer rollers having the photoconductive belt wrapped thereabout rotate in opposite directions. A blanket of developer material is formed between the last two developer rollers. An apparatus of this type optimizes development of the latent image recorded on the photoconductive member.

Abstract: An apparatus in which a developer roller transports developer material into contact with a photoconductive surface having either a continuous tone or a half-tone latent image recorded thereon. The speed of the developer roller is controlled so that it rotates at a higher speed when developing the continuous tone latent image than when developing the half-tone latent image. In this way, development is optimized for the continuous tone and half-tone latent images so as to produce high quality copies.

Abstract: An apparatus in which a plurality of sheets are adhesively bound together to form a booklet thereof. A glue applicator blade is reciprocated into and out of contact with a marginal region of sheets advanced thereto in seriatim. The glue applicator blade forms a line of adhesive on the marginal region of each sheet. The sheets are overlayed and pressed together to form a bound booklet thereof.

Abstract: An electrophotographic printing machine in which a developer roller transports a developer material comprising carrier granules and toner particles closely adjacent to an electrostatic latent image recorded on a photoconductive surface so as to develop the latent image with the toner particles. A member is positioned closely adjacent to the developer roller to attract the toner particles to at least one surface thereof. A beam of energy is transmitted through the member onto the surface on which the toner particles adhere. The internal angle of incidence of the beam of energy is greater than the critical angle of incidence of the member. The intensity of the beam of energy internally reflected through the member is detected. A signal indicative of the quantity of toner particles attracted to the surface of the member is generated. The signal is processed and a signal transmitted indicating the end of the useful life of the developer material.

Abstract: In a reproducing machine having copy sheets advancing through a processor to have information recorded thereon, it is necessary to be readily able to remove jammed sheets therefrom. A display on the reproducing machine indicates to the operator when a jam occurs. In response to the occurrence of a jam, all of the sheets in the processor are automatically freed from their respective sheet transports. In this way, the operator may readily remove the jammed sheet from the respective transport.

Abstract: An apparatus in which a latent image recorded on an image receiving member is developed. A developer roller transports marking particles into the development zone. A blade having at least one aperture therein through which the marking particles pass has the free end portion thereof contacting the developer roller. A controller regulates the quantity of marking particles passing through the aperture in the blade. In this way, the thickness of the layer of marking particles on the developer roller is adjusted.

Abstract: An apparatus which transfers particles from a refill container into an open ended hopper. A cover closes the open end of the hopper with a chute being disposed interiorly of the hopper. When the cover is opened, the chute moves to an exterior position for receiving the refill container. The surface of the chute, in engagement with the refill container, is inclined to the horizontal so that the refill container does not have to be completely inverted when discharging particles into the hopper.

Abstract: An apparatus in which a latent image recorded on an image receiving member is developed. A metering roller advances marking particles to a developer roller for transportation to the latent image. The thickness of the layer of marking particles on the developer roller is a function of the ratio of the surface speed of the metering roll to developer roll. In this way, a thin layer of marking particles is transported into contact with the latent image to form a powder image on the image receiving member.

Abstract: An electrophotographic printing machine in which a latent image is recorded on a photoconductive surface with modulated and continuously charged regions. The modulated regions are developed with polar or polarizable marking particles with the continuously charged regions being developed with charged marking particles. The charged marking particles and polar or polarizable marking particles are different colors. Both types of marking particles are transferred simultaneously to a copy sheet and subsequently permanently affixed thereto forming a two-color copy.

Abstract: An apparatus which meters precise quantities of magnetic marking particles onto a developer roller in a magnetic brush development system. An open ended container stores the supply of marking particles therein. A magnetic roller, positioned in the open end of the container, meters marking particles from the open end of the container onto the developer roller of the magnetic brush development system.

Abstract: An apparatus which develops a latent image recorded on a flexible member. Developer material is transported into contact with the flexible member in the development zone so as to develop the latent image. The flexible member is maintained at a pre-selected tension. As the developer material contacts the flexible member in the development zone, the flexible member deforms so as to conform, at least partially, to the developer material.

Abstract: A developer mixture used in an electrophotographic printing machine to develop an electrostatic latent image recorded on the photoconductive member includes weakly magnetically attractable toner particles and strongly magnetically attractable carrier granules adhering triboelectrically to one another. The toner particles and carrier granules are substantially the same size. During development, the toner particles are deposited on the latent image forming a toner powder image. Subsequently, the toner powder image is transferred to a copy sheet and permanently fixed thereto.

Abstract: A printing machine having an operator removable housing comprising a photoconductive member with a web entrained about a portion thereof. A latent image is recorded on the photoconductive member and marking particles transported to the portion of the web entrained about the photoconductive member. In this way, the latent image recorded on the photoconductive member attracts the marking particles to the web in image configuration. A copy sheet is advanced into contact with the marking particles on the web. The marking particles interposed between the web and the copy sheet are heated. After cooling, the copy sheet is separated from the web with the marking particles remaining affixed thereto.

Abstract: An apparatus in which particles are discharged from the open end of a storage chamber. In the operative mode, a brush mounted movably adjacent the open end of the chamber, is actuated. The brush has at least one row of bristles for dispensing particles from the open end of the storage chamber. In the inoperative mode, the brush is positioned such that the row of bristles seals the open end of the chamber preventing the discharge of particles therefrom.

Abstract: An apparatus which develops a latent image with marking particles. The apparatus includes a developer roller which transports the marking particles closely adjacent to the latent image. As the marking particles are deposited on the latent image, the developer roller senses the charge thereon. In response to the sensed charge of the marking particles, additional marking particles are dispensed into the chamber of the housing for subsequent use by the developer roller.

Abstract: A cartridge in which marking particles used in an electrophotographic printing machine are stored. The cartridge has an opening in the surface thereof for discharging the marking particles therefrom. A flexible sealing strip is secured removably to the cartridge and seals the opening in the surface to prevent the discharge of the marking particles. The sealing strip is folded back over itself in juxtaposition. A flexible backing strip has the portion of the sealing strip folded back secured thereto. As the sealing strip is removed from the cartridge, successive portions thereof are secured to the backing strip. The foregoing occurs automatically when the cartridge is inserted in a dispensing unit of the printing machine and rotated. In this way, the cartridge is sealed when inserted in the printing machine and, after being rotated, automatically opened to discharge marking particles into the dispensing unit of the printing machine.

Abstract: An apparatus in which an image region recorded on a photoconductive surface is developed with a dry developer material. A transport moves the dry material closely adjacent to the photoconductive surface. The charge induced on the transport by the charge on the photoconductive surface is controlled to electrically bias the transport to a potential intermediate the potential of the image region and non-image region of the photoconductive surface.

Abstract: An apparatus in which an electrostatic latent image recorded on a photoconductive member is developed. A supply of developer material comprising at least toner particles and carrier granules is stored and transported closely adjacent to the electrostatic latent image recorded on the photoconductive member. The quantity of developer material being transported to the electrostatic latent image recorded on the photoconductive member is controlled by a metering blade. At least accumulation of toner particles adjacent the blade is prevented and a flow of toner particles away from the blade induced. In this way, the escape of toner particles from the storage chamber thereof is substantially minimized.This invention relates generally to an electrophotographic printing machine, and more particularly to a development system which minimizes the escape of at least the toner particles of the developer material therefrom.