Abstract: An apparatus which develops an electrostatic latent image recorded on a photoconductive member used in an electrophotographic printing machine. The apparatus employs a developer material which ages during the life of the electrophotographic printing machine. Carrier granules are added to the developer material to extend the life of the developer material. When the quantity of developer material exceeds a predetermined quantity, developer material exits therefrom through an exit port. A magnetic flux field is generated in the region of the exit port to form a carrier bead curtain which prevents the passage of toner particles therethrough while permitting developer material and carrier granules to exit therefrom.

Abstract: An apparatus in which a latent image is developed with developer material. An applicator roller has developer material adhering releasably to at least a portion of the exterior surface thereof. The applicator roller rotates and translates from an non-operative position spaced from the latent image to an operative position closely adjacent the latent image. In this way, the applicator roller transports developer material to the latent image. After development is completed, rotation and translation of the applicator roller is reversed to return the applicator roller to the non-operative position terminating development. An apparatus of this type is used in a multicolor electrophotographic printing machine wherein successive latent images are developed with different color developer materials and the respective developer materials are prevented from co-mingling on the same latent image.

Abstract: An apparatus which develops a latent image recorded on a generally planar photoconductive member moving in a direction at least partially inclined with respect to the gravitational force exerted thereon. The latent image is developed with a liquid developer material in an extended development zone substantially parallel to the photoconductive member. The liquid developer material is pumped partially upwardly from the lowermost region of the development zone toward the uppermost region thereof. This forms a pressure barrier preventing the escape of liquid developer material from the lowermost region of the development zone. A sealing roller prevents the escape of liquid developer material from the uppermost region of the development zone.

Abstract: An apparatus which determines the location of an edge of an advancing sheet and discriminates between a hole therein. After the leading edge of the sheet is detected and the sheet has moved a first predetermined distance, the absence or presence of the sheet is sensed for a second predetermined distance. If the sheet is not detected as it moves the second predetermined distance, the control logic indicates that the trailing edge has been detected. In the event the sheet is sensed, the control logic indicates that a hole has been detected and the process is repeated to locate the trailing edge.

Abstract: A method of assembling parts in which, before actual assembly of the parts, the forces associated with a good assembly of parts and the forces associated with a faulty assembly of parts are identified to train a pattern of recognition signature analysis system. During assembly, the forces required to actually assemble the parts are measured and a determination is made by the system as to whether these forces are associated with a good assembly or a faulty assembly to determine if the assembled part should be accepted or rejected.

Abstract: An apparatus which develops a latent image, corresponding to an original document, recorded on a moving member. The apparatus includes a first developer unit and a second developer having their characteristics regulated so that the density of the developer material deposited on the latent image by the second developer unit approximates that of the original document over a first density region of the original document. The density of the developer material deposited on the latent image by the second developer unit or both the first developer unit and the second developer unit approximates that of the original document over a second density region.

Abstract: An apparatus which seals a shaft mounted rotatably on a bearing member. At least two spaced apart annular flanges are mounted on the shaft. One of the flanges being is arranged to bear radially against the bearing member. An annular sealing member is mounted on the shaft between the two flanges in abutting relation with at least one of the flanges to form a radial seal with the bearing member.

Abstract: An apparatus in which a latent image recorded on a photoconductive member is developed with developer material. A developer roller, positioned closely adjacent to the photoconductive member, is arranged to transport the developer material into contact with the photoconductive surface in the development zone. A blade member moves from an operative position to a non-operative position. In the non-operative position, the blade member has the free end portion thereof spaced from the developer roller. This enables the developer roller to transport the developer material into contact with the photoconductive member to develop the latent image recorded thereon. In the operative position, the blade member has the free end portion thereof contacting the developer roller. This prevents the developer roller from transporting the developer material into contact with the photoconductive member to prevent development of the latent image recorded thereon.

Abstract: A device which brakes a drive motor having a rotor adapted to be axially displaced when the motor winding is de-energized. A braking member moves with the rotor so that when the motor winding is deenergized, the circumferential surface of the braking member engages the stationary member to frictionally stop the rotation of the rotor. When the braking member engages the stationary member, the exterior circumferential surface thereof pivots to position substantially the entire surface of the exterior circumferential surface in contact with the stationary member. Energization of the motor moves the braking member with the rotor away from the stationary member and the exterior surface of the braking member pivots to disengage from the stationary member enabling the rotor to rotate.

Abstract: An apparatus in which fixed and variable indicia are printed on a receiving member. One portion of a xeroprinting master has an imagewise pattern corresponding to the fixed indicia formed thereon. The xeroprinting master is uniformly charged and, the portion thereof having the imagewise pattern formed thereon, uniformly exposed to light energy. This records a fixed electrostatic latent image corresponding to the fixed indicia thereon. Another portion of the charged xeroprinting master is selectively exposed to light energy to record a variable electrostatic latent image corresponding to the variable indica thereon. The fixed and variable electrostatic latent images are developed, and the developed image is transferred to the receiving member to print the fixed and variable indicia thereon.

Abstract: A pad, used with an optical mouse, including a substantially transparent sheet having a pattern of spaced dots on one surface thereof. One surface of a bottom sheet is positioned adjacent to the surface of the transparent sheet having the dots thereon. The other surface of the bottom sheet has a coefficient of friction sufficient to minimize slippage of the pad when an optical mouse is moved therealong.

Abstract: An apparatus in which a rotatably mounted roller cooperates with a rotatably mounted polyhedron to define a nip through which a set of sheets is advanced.

Abstract: An apparatus which adhesively binds a set of sheets by applying a strip having an adhesive on one surface thereof to the spine of the set. The strip is supported on a heated platen which softens the adhesive. The spine of the set of copy sheets is pressed into the adhesive on the strip. The depth of penetration of the spine into the adhesive is controlled so as to form a layer of adhesive between the spine and the strip having a predetermined thickness.

Abstract: A toner cartridge for use in a copying machine for supplying fresh toner to the developer for the machine. The cartridge is formed with an elongated opening to permit discharge of toner when inverted. A removable flexible strip covers the opening and is detachably held to the cartridge by adhesive material. The pattern of the adhesive material is non-linear at the portions of the cartridge adjacent the ends of the opening so that upon an application of a pulling force upon the strip to detach the same, the resistance force is gradual.

Abstract: An apparatus in which an image is fused to a sheet during a copy run. The number of sheets having images fused thereto is counted during the copy run. Heat is applied to at least the images of successive sheets of the copy run. The heat being applied to the images on successive sheets is controlled in response to the number of sheets counted.

Abstract: A magnetic roll which is used in a processing station of an electrostatographic printing machine. The roll has a central portion with a plurality of spaced fins extending generally radially outwardly therefrom. A shaft extends outwardly from opposed ends of the central portion along the longitudinal axis thereof. A magnet is secured in each space between adjacent fins. A sleeve is rotatably supported on the shaft.

Abstract: An apparatus in which particles are dispensed from an open ended chamber of a container into a transport adapted to move the particles therefrom. The apparatus prevents the bridging and caking of particles in the chamber. A member, positioned in the chamber of the container in the region of the open end thereof, is in engagement with the transport. The member is resiliently coupled to the container and agitated as the transport moves the particles. This causes the springs resiliently coupling the member to the container to vibrate. As the springs vibrate, bridging and caking of the particles is prevented and the particles are dispensed from the open end of the chamber in the container.

Abstract: A cylindrical magnet for a magnetic brush developer unit used in an electrophotographic printing machine is of U-shaped cross section having a cylindrical outer surface, and a cavity through which extends the rotary axis of the sleeve. The material forming the magnet is a moldable plastic containing a comminuted ferrite. The longitudinal, angularly spaced, poles are produced in the material during the molding operation. The magnetic body is bonded to end support members, and it is self-supporting between them.

Abstract: A lamp system which erases selected portions of an electrically charged photoconductive member. The lamp has a transparent housing defining a chamber filled with a gaseous medium. A charge is induced across a selected region of the gaseous medium. This causes the gaseous medium to ionize in the selected region so as to emit light rays thereat. The light rays illuminate the electrically charged photoconductive member in the selected region to discharge the charge thereat.

Abstract: An apparatus in which the developability of electrostatically charged particles in a mixture of particulate material is measured. The apparatus includes a transparent member positioned closely adjacent to a developer roller of an electrophotographic printing machine. A brush of particles is formed adjacent the member in one mode of operation, while, in another mode of operation, a cloud of particles is formed adjacent the member. A portion of the charged portions are attracted to the member. A beam of energy is transmitted through the member with the internal angle of incidence being greater than the critical angle of incidence of 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.