Abstract: A toner concentration monitor includes a polarized dielectric member which, when dipped into a development mixture of carrier and toner particles, provides an accurate indication of the toner concentration of the mixture by the amount of toner particles which adhere to the member. The polarized dielectric member is preferably an electret.

Abstract: The low intensity reciprocity failure characteristics of a silver halide emulsion are improved, without significant reduction of high intensity speed, by incorporating iridium ion into the silver halide grains after or toward the end of the precipitation of the grains in such a way that iridium is below the surface of the grains.

Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing ions of one or more rare earths selected from among those having an atomic number of 39, 62 to 64 inclusive, and 67 to 71 inclusive. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.

Abstract: Magnetic recording apparatus for a photographic still camera comprises a fixed magnetic head mounted on a film platen. The head is adapted to contact a magnetic coating on the film adjacent the image area of the film. A pressure pad is mounted in the camera on the opposite side of the film and positioned in close proximity to the film. The pressure pad is biased by a spring to apply pressure on the head through pressure on the film to assure that the film is in intimate contact with the head when the film is advancing. During film exposure when the film is stationary, the pressure pad is retracted to avoid distortion of the image plane.

Abstract: Disclosed is a novel blend of a water-dissipatable polyester material and an acrylic polymer. The acrylic polymer must be compatible with the polyester and can be optionally styrenated. The polyester is exemplified in having an acid component of from about 70 to about 84 mole % isophthalic acid and conversely from about 25 to about 16 mole % 5-sodiosulfoisophthalic acid, and having a glycol component of from about 45 to about 60 mole % diethylene glycol and conversely from about 55 to about 40 mole % 1,4-cyclohexanedimethanol or ethylene glycol or mixtures thereof.The polymer blends are useful for preparing ink compositions having improved block resistance and water resistance.

Abstract: Techniques are provided for regenerating photoconductor elements, particularly those of the unipolar, homogeneous type. These techniques utilize a low-voltage to moderate-voltage reverse charge. Also provided are new photoconductor elements useful in the practice of such techniques.

Abstract: In the present invention a matrix array of organic electroluminescent storage display elements along with row and column selection circuitry are used to select the particular display elements within the matrix to be illuminated. Interposed between the column and row selection electronics are a plurality of memory cells receiving as inputs bit values that correspond to the desired intensity requested from a display element. The memory cells output activation signals which drive corresponding MOS switches each of which in turn is parallel connected as part of a current driver source feeding a single display element. Activation of one or more of the MOS switches provides a controlled amount of current to be applied to the display element to in turn provide a related amount of light from the display element.

Abstract: A film core supporting structure for an electrophotographic copying or printing machine. The supporting structure includes a two-point suspension system near a roller in the film core and a yoke assembly supporting the film core near another roller. A one-point supporting system is used to support the yoke and restrict its movement in only one dimension. Toner stations are attached to the film core and a drum is supported by the two-point suspension system. A write-head is connected to the yoke. The overall supporting structure prevents distortion of the machine frame from imparting distortive forces through the supporting structure to the film core.

Abstract: Disclosed is a novel ink reservoir containing a polyester fiber, such as a poly(ethylene terephthalate) fiber, having at least one continuous groove. The surface of the groove of the fiber is preferably rougher than the surface outside the groove. The ink reservoirs are useful for use with aqueous inks and have improved ink transport properties.

Abstract: A scanner is disclosed which uses an electro-optic deflector to deflect a light beam onto a receiving medium. The deflector comprises a substrate formed of an optical material and a thin film optical channel waveguide fabricated on a top surface thereof. A light beam is supplied to the waveguide along an optical axis in the waveguide. An array of parallel metallic electrodes are formed adjacent to the waveguide. Each of the electrodes is adapted to receive a voltage independently of the other electrodes. When a voltage is supplied to an electrode, a local variation in the index of refraction of the waveguide occurs across the thickness of the waveguide, and this local variation is used to effect the radiation of the beam into the substrate. In order to use the waveguide to scan a light beam across the receiving medium, the light beam is supplied to the waveguide in a direction normal to the electrodes, and a voltage is sequentially supplied to the electrodes.

Abstract: A flip-up flash unit for a camera has a built-in viewfinder opening for viewing a subject to be photographed when the flash unit is swung to an operative position elevated from the body of the camera. The body of the camera, therefore, can be made more compact because the need for a viewfinder opening in the body is eliminated.

Abstract: A fuser and pressure roller type fusing apparatus for fusing toner images onto a suitable receiver in an electrostatographic copier or printer includes a passive release oil application cartridge for positively supplying and applying release oil to the surface of the fuser roller therein. The cartridge includes a release oil reservoir, a release oil application roll which contacts and is driven by the rotation of the fuser roller, and an oil feeding and pumping assembly for delivering oil from the reservoir to the application roll.

Abstract: A reproduction apparatus magnetic brush developer station having a housing including an upper and lower portion, a plurality of members including at least one set of magnets, a developer transport mechanism, and a developer material mixer. The set of magnets is rotatably supported in the upper portion of the housing. The lower portion of the housing, which provides a reservoir adapted to contain a mixture of carrier particles and pigmented marking particles, rotatably supports the transport mechanism and mixer. A drive mechanism is provided to rotate the set of magnets, transport mechanism, and mixer respectively. The upper housing portion is coupled to the lower housing portion for pivotable movement to a closed position wherein the set of magnets is in operative relation with the transport mechanism and the mixer, and to an open position wherein the set of magnets, transport mechanism, and mixer in the interior of the housing are readily accessible.

Abstract: An improved electro-optic modulator for a light valve device of the kind wherein the modulator is sandwiched between cross polarizer elements. The modulator includes a ferroelectric ceramic panel having a plurality of parallel grooves forming intervening parallel walled ridge portions. A series of address and reference electrode pairs are formed on the ridge side walls with each electrode pair being substantially parallel and opposingly centered on a normal across the intervening ridge portion. The electrode pairs of the series are staggered in location along respective ridge portions to define an array having a linear direction at about 45.degree. to the direction of the panel grooves. The panel can be oriented between the polarizer elements with the polarization directions of the elements parallel to and perpendicular to the linear direction of the array.

Abstract: A method of making a photographic paper support having improved raw stock keeping characteristics by an internal acid sizing step and an external alkaline sizing step to achieve a water extractable pH of from 6 to 9.5.

Abstract: An automatic film processor sets new reference developer chemical temperatures and film transport speeds in accordance with user input at a keypad and disengages the film transport motor under microcomputer control to prevent further introduction of film until sensed actual developer temperature is within an acceptable tolerance of the new set temperature. A "wait" light is modulated to flash with increasing frequency as the gap between actual and set reference temperature is narrowed. Manual override is provided to re-engage the film motor even though the new set temperature has not been reached. A buzzer signals a feed in the override mode.

Abstract: A line sensor with photosites accurately located for color scanning. The sensor includes a plurality of photosites arranged in a two-dimensional, staggered pattern which is repeated across the length of the sensor. Only one photosite is located for every direction perpendicular to the axis of the line image. Individual color filters extend over all the photosites located at the same perpendicular distance from the line image axis. In one embodiment, the filters are disposed on separate transparent members which are aligned and assembled over the photosites.

Abstract: Disclosed are poly-methine compounds having the formula: ##STR1## wherein R.sup.1 is an unsubstituted or substituted alkoxycarbonyl, cycloalkoxycarbonyl or aryloxycarbonyl radical; an unsubstituted or substituted carbamoyl radical; or an unsubstituted or substituted alkylsulfonyl, cycloalkylsulfonyl or arylsulfonyl radical, or an unsubstituted or substituted aryl radical;R.sup.2 is an unsubstituted or substituted alkyl, cycloalkyl or aryl radical;R.sup.3 is hydrogen, alkyl, --OR.sup.2 or halogen; andL is an organic linking group bonded by non-oxo carbon atoms to the oxygen atoms adjacent to L. Also disclosed are admixtures of about 100 to 10,000 ppm of at least one of the poly-methine compounds and certain condensation polymers. The resulting polymer compositions are useful to protect substrates or materials susceptible to degradation by ultraviolet light.

Abstract: In a camera to be used with a light-tight cassette which in inherently capable of automatically advancing a filmstrip from the cassette shell whether the filmstrip is generally unexposed, partly exposed or substantially completely exposed, and which has a status indicator for providing a visible indication of the exposure status of the filmstrip, a sensing/blocking member is included to cooperate with the status indicator to prevent cassette loading into the camera in one embodiment only when the status indicator indicates that the filmstrip is completely exposed and in another embodiment either when the status indicator indicates that the filmstrip is partly exposed or it indicates that the filmstrip is completely exposed.