Abstract: A camera with an internally arranged electronic flash device in which there is arranged a distance control knob releasably interlocking with a power source switch of the flash device. When the object to be photographed needs the flash device under conditions of low luminance the power source switch is moved to a suitable position indicating a particular distance between the object and the camera while the power source switch is moved into the "ON" position. When the photograph is taken with natural light the distance control knob is operated independently of the power source switch.

Abstract: Control circuitry is disclosed for operating stations in an automatic electrophotographic reproducing machine in either of two modes to make copies of different sizes. In one mode a document is held stationary while moving scanning elements move past it to form a scanned image, and in the second mode the scanning elements are held stationary while a document feeder feeds sheet documents past the scanning elements. The control circuity includes a multiplexer for gating appropriate signals to the various stations according to the mode in which the machine is operating.

Abstract: An apparatus in which a latent image is developed with particles. A support member advances the particles from a storage chamber to the development zone. In the development zone, the particles are separated from the support member and attracted to the latent image. This develops the latent image with these particles.

Abstract: A reader-printer comprises a housing having a viewing opening, a screen disposed within the housing, means for moving the screen between an exposure position and a position spaced apart from the exposure position, means for projecting the image of a film onto the exposure position, means for feeding a copy sheet to the exposure position, means for delivering the copy sheet from the exposure position, and means for controlling external light entering the housing through the viewing opening.

Abstract: An apparatus in which a powder pattern is formed on a surface. The apparatus applies particles to at least a portion of the surface as well as removing other extraneous particles therefrom.

Abstract: First and second rollers extend perpendicular to the direction of reciprocation of the scanning head and are disposed on opposite sides of the scanning head in said direction. First and second curtains are fixed at first ends to the first and second rollers respectively and at second ends to the scanning head. The curtains are rolled around the respective rollers. First and second pulleys are fixed for rotation with the first and second rollers. A tensioned wire is fixed at its opposite ends to the first and second pulleys and rolled around the first and second pulleys in directions opposite to directions in which the first and second curtains are rolled around the first and second rollers respectively. As the scanning head is moved thereby unrolling one of the curtains, the pulleys and wire rotate the other roller so as to roll the other curtain thereonto.

Abstract: A dichroic filter system for delivering UV to induce crosslinking of photocurable organic compounds on a substrate, whereby substantially all the UV is reflected to the workpiece while undesired infra red light is transmitted and absorbed by a dichroic filter and absorber arrangement. The filters are arranged so that substantially all the UV light from a line source of light strikes a dichroic surface only once and substantially all the UV light leaving the system has struck a dichroic surface once.

Abstract: A composition information operating apparatus and a method of recording composite information, the apparatus utilizing an endless rotatable photosensitive member, components for forming an electrostatic latent image of an original on the member, an electrostatic recording head and a separate charge detecting scanner and transmission head while the method includes the steps of first forming an electrostatic latent image of the original, then forming a further electrostatic latent image with the recording head and detecting and transmitting the electrostatic latent image on the photosensitive member with the charge detecting scanner and transmission head, the entire process being performed during a single rotation of the photosensitive member.

Abstract: Apparatus for producing positive enlarged copies from positive or negative microfilm, in which the photoconductive element can be charged either negatively or positively so that one developing liquid containing particles of only one polarity can be used to create positive copies regardless of whether the original microfilm is positive or negative. The apparatus includes a reusable photoconductive web having an aluminum backing, a perforated development electrode, and a transfer station for transferring the developed image to paper.

Abstract: An electrographic apparatus which makes use of a corona charge device and which is constructed to effectively remove detrimental gas such as ozone and dust produced in the corona charge device. The apparatus comprises a drum type screen photosensitive body rotatably mounted on a rotatable shaft and a substantially hermetically sealed cylindrical cover for surrounding the photosensitive body. The cylindrical cover is provided at its periphery with an air inlet opening and an ion outlet opening opposed to an ion discharge wire provided for the corona charge device. A fan is opposite the air inlet opening and is provided at its suction side with a filter and a heater.

Abstract: A xerographic copier made up of a machine frame having a suspension mechanism supported in a cabinet so that the frame can be pulled out of the front of the cabinet for servicing. The machine has a drum covered with a removable photo-sensitive sheet of material held in place by double sided adhesive tape and a lens system made up of two lenses. The lenses are swung about an axis passing through the periphery of the drum, and the lenses are maintained at a fixed distance from the document support throughout their movement. A toner dispenser made up of magnetic rubber disposed in the form of a hollow cylinder which moves past a permanent magnet held in fixed position relative to the inner periphery of the cylinder is provided. The magnetic particles in the magnetic rubber are so magnetized that they provide a plurality of spaced magnetic poles, and the permanent magnet cooperates with these poles, causing the particles on the outer side of the hollow cylinder to erect in the form of brush bristles.

Abstract: A copier having a stationary document glass and a scanning illumination/optics mechanism. The illumination/optics mechanism reciprocates through a linear scan motion and a reverse-direction reset motion during a copy process cycle. A moving photoconductor is connected to move the scanning mechanism in a scanning direction for a first part of the photoconductor movement, and to move the mechanism in the opposite reset direction during a second part of the photoconductor movement. Rotary-to-reciprocating harmonic motion mechanism couples the photoconductor's motion to the scanning mechanism to move the mechanism through the scan and reset motion.

Abstract: An improved method for varying the Gamma in a TESI electrostatic imaging system is disclosed which provides for positioning a surface of a photoconductive body and a surface of a dielectric body in virtual contact whereby an air gap exists between a portion of the surfaces. The photoconductive body is imaged by exposure to electromagnetic radiation in image configuration while an electric potential difference is simultaneously established across the photoconductive and dielectric bodies. The resulting field in illuminated areas has a magnitude for causing ionization in the air gap and causing a charge pattern to transfer to the dielectric body. The process Gamma is controlled by employing a pulse imaging technique. Pulse imaging is provided by repeatedly interrupting the potential difference, the exposure or both.

Abstract: An improved developing device in electrophotographic copying apparatus in which a plurality of developing electrodes are disposed along a path of movement of a photosensitive drum surface. The electrodes are applied with voltages in a graded manner which conforms to the damping characteristic of the potential on the photosensitive surface at a developing station. The values of voltages applied can be controlled in accordance with the value of potential formed by an imaging area of the drum surface while maintaining the graded potential to thereby achieve an excellent developing effect. Further, the drum surface is provided with an unexposed and hence high potential portion which serves to remove toner which accumulates on the electrodes.

Abstract: In an electrophotographic copying apparatus of a type in which an electrostatic latent image of an original to be copied is formed, through suitable illumination means, on a dielectric surface of a transfer material or copy paper held under pressure between a photoreceptor plate and an electrically conductive pressure pad on a pressing plate during impression of a potential across the photoreceptor plate and the pressure pad, there are incorporated an improved pressing device for pressing the copy paper against the photoreceptor plate, and a fixing device having uniform heat radiation and operated through a special fixing temperature control circuit.

Abstract: A color image carrier such as positive film is brought into contact with a monochrome recording medium such as silver salt film. The color image carrier is illuminated with red, green and blue beams. These three color beams respectively can project coded information about diffraction gratings or slits which are different in angle or pitch in accordance with the respective colors. Thus, each color image carrier containing the coded information about each diffraction grating or slit is recorded on the monochrome recording medium.

Abstract: A reproducing apparatus and process for forming multiple copies of a document. The apparatus includes a moving photosensitive surface. The first copy of the document is formed while the document is moving in synchronism with the photosensitive surface and the second and further copies of the document are formed while the document is held stationary. The multiple copy mode of operation can be combined with other modes of operation such as reduction, a single copy mode and a large document copying mode, as desired, to provide an apparatus having substantial versatility.

Abstract: A lamp housing and socket assembly includes an injected molded plastic housing with an integral, axially outwardly directed collar and a radially inwardly directed light interception surface with a bulb access opening slightly larger in diameter than the maximum diameter of a bulb supported in a lamp socket; the lamp socket includes a plurality of locking ears on one end thereof and a sealing gasket; a standard socket mounting cap is supported on the collar to define a socket mount that can be universally used with mirrors having a range of focal lengths.

Abstract: An electrophotographic copying apparatus of slit exposure type comprises a sheet original conveyor mechanism provided on top of the machine housing, and an original carriage having a transparent sheet of glass or the like provided contiguously with the frame of the conveyor mechanism. When a sheet original is to be copied, such original is transported by the sheet original conveyor mechanism for a through-slit exposure. When a thick original such as book or the like is to be copied, the original carriage with the thick original thereon is forced to move with the conveyor mechanism to disconnect the mechanism from its drive system but connect the drive system to the original carriage, whereafter the carriage is moved for the thick original thereon to be subjected to a through-slit exposure.

Abstract: A copying apparatus in which thin or thick originals such as individual sheets or thick books are selectively driven over an illumination slit aperture, characterized by a transparent book support such as a glass plate connected to a known transport mechanism for individual sheets such as a pair of transport rolls. The book support is located on the extension of the transport mechanism, and the transport mechanism and the book support are selectively movable together.