Abstract: A process allows a disk drive system to optimize head position in order to minimize the effects of track variations due to disk misclamping and imperfections. The process utilizes a transducer head having a width less than a track width. The small size of the transducer head allows it to be positioned within a stationary band which remains within the boundaries of the track for the complete revolution of the disk. Once the head is positioned within this band for one track of the disk, this track can be used as a reference for positioning the head within the bands of the other tracks.

Abstract: In an objective lens for an optical disk of the type in which focussing is carried out by moving a unit of the entire optical system including a light source and an objective lens, variation of the numerical apertures and deterioration in performance for the focussing are not present, but it is important for reducing the weight of the unit as light as possible to minimize the distance from a light source to an information recording surface while securing an operating distance as required. The lens for that purpose is an aspherical single lens, but it is necessary, for an aspherical shape less affected by a high-order term to be easily fabricated, to make a surface on the light source side an aspherical surface, of which conical coefficient is within a predetermined range.

Abstract: Disclosed is a photographic film-feeding apparatus for positioning picture frames of a film to an exposure position in a camera, wherein there is provided a feeding mechanism which is controlled so as to wind or rewind the film by two frames in response to every picture-taking operation. When starting the rewinding process, the feeding mechanism is further controlled so that the film is rewound so as to position a picture frame being adjacent to the latest exposed frame in the winding process to the exposure position and thereafter the film is rewound by two frames.

Abstract: The invention provides a rotatable polygon mirror consisting of (a) cylindrical boss being disposed at the center part of polygon and having a hole therein, (b) side plate being disposed at each side of polygon, the outer surface of the side plate forming a mirror surface, (c) connecting-plate for connecting between the cylindrical boss and the side plate, and rib being radially disposed between the cylindrical boss and each corner of polygon.

Abstract: The present invention provides an image processing apparatus for estimating a halftone image from an original binary coded image, wherein there are provided a plurality of line memories for introducing the original binary coded image data and for transferring the data into a shift-register being set therein plural kinds of scanning windows, a computing circuit for counting black pixels within each of the plural kinds of scanning windows, a density pattern-discriminating circuit for performing the comparison judgment between the original binary image and the rebinary image based on the computed value, a conditional formula circuit for performing conditional inequality algorism, and a window judgment circuit having a predetermined truth table for selecting one optimum scanning window.

Abstract: Disclosed is a stamping device for use in facsimile equipment, wherein a document has a mark stamped hereon after its information has been transmitted. The stamp device is composed of a stamp body which has a stamp face for marking the document and a handling knob; a mounting plate for detachably holding the stamp body; and a solenoid for moving the mounting plate, whereby the stamp face is pressed onto the document so as to stamp the mark. The stamp body and the mounting plate are shaped so that the stamp body is engaged with a freely removed from the mounting plate by using the knob of the stamp body.

Abstract: A silver halide photographic light-sensitive material is disclosed, which has high sensitivity and can be handled under bright safelight. The photographic material comprises a support bearing thereon photographic component layers including at least one silver halide emulsion layer containing a silver halide emulsion sensitized so as to have a maximum spectral sensitivity on the side of a wavelength shorter than at least 600 nm and at least one non-light-sensitive hydrophilic colloid layer arranged to the side of the silver halide emulsion layer opposite to the support. And at least one of the hydrophilic colloid layers contains a water-soluble dye having a maximum light-absorption within the wavelength region of not less than 700 nm.

Abstract: A copy paper processing apparatus wherein a set of copy papers supplied sheet by sheet from the outside while overlaying them are selectively punched by a puncher and stapled by a stapler and punch pins of the puncher are pulled out after the stapling operation is ended.

Abstract: A process for producing a polyester resin composition containing at least 10 wt % of a white inorganic pigment dispersed in a polyester resin, which comprises kneading the polyester resin with the white inorganic pigment and thereafter subjecting the blend to a polycondensation reaction at a temperature ranging from the melting point of the polyester up to 300.degree. C. and at a reduced pressure of not higher than 5 Torr, is disclosed.

Abstract: A photoreceptor for electrophotography containing a titanyl phthalocyanine compound which has major peaks in terms of Bragg's 2.theta. angle to the CuK.alpha. characteristic X-ray (wavelength at 1.541 .ANG.) at least at 9.4.+-.0.2 degrees, 11.7.+-.0.2 degrees, 11.7.+-.0.2 degrees, 15.0.+-.0.2 degrees, 23.5.+-.0.2 degrees, 24.1.+-.0.2 degrees and 27.3.+-.0.2 degrees is disclosed.

Abstract: An antistatic silver halide photographic light-sensitive material having a support, provided thereon, at least one light-sensitive layer and at least one non-light-sensitive layer is disclosed. Said at least one non-light-sensitive layer comprises a polymer compound consisting essentially of a repeated structural unit represented by Formula [I], and a formamide compound represented by Formula [II]; ##STR1## wherein Z, and Z.sub.2 represent the group of the atoms necessary to form a six-membered ring with--N.sup..sym. --; R represents a divalent group; R.sub.1 and R.sub.2 represent independently one selected from the group consisting of an alkyl group and an aryl group; R.sub.3 represents a hydrocarbon group; R.sub.5 and R.sub.6 represent independently a hydrogen atom or an alkyl group; X.sub.1.sup..crclbar. and X.sub.2.sup..crclbar. represent an anion; a and l represent an integer of 0 and 1.

Abstract: A document feeding apparatus wherein documents are fed one by one from a document stacker by a first document feeding device and a second document feeding device which is provided in the midway of a path from the first document feeding device to a processing unit, and the movement of the document is stopped temporarily by a document stopping device before the leading end of the document fed from the second document feeding device reaches a synchronous sensor provided in the midway of a path from the second document feeding device to the processing unit. The first document feeding device consists of a feeding belt connected to a drive source through an electromagnetic clutch, and a separating roller which is in sliding contact with an upper surface of the feeding belt in a non-rotary state. The second document feeding device consists of a drive roller connected to a drive source through an electromagnetic clutch, and a driven roller which is press contact with the drive roller.

Abstract: A thermal transfer printer includes a head holding member for holding a printing head and for applying an urging force for urging the printing head against a platen and separating the printing head from the platen. An elastic member biases the head holding member to urge the printing head against the platen. A regulating member regulates displacement of the elastic member to change the urging force of the printing head against the platen. A driving unit drives the regulating member. A detecting unit detects either one or both of the type of ink ribbon or the surface roughness of recording paper. A control unit controls the driving unit in accordance with the result of the detecting unit. The urging force of the printing head is thus changed in accordance with either one or both of the type of ink ribbon or the surface roughness of the recording paper.

Abstract: A silver halide photographic material is disclosed which has at least one hydrophilic colloidal layer on a support, said photographic material having a water content of 10-20 g/m.sup.2 at the time when the washing step of processing with a roller transport type automatic processor is completed.

Abstract: An image forming method wherein a latent image is formed by subjecting an image retainer having a photoconductive layer to a image exposure, a toner image is formed by developing the latent image with a toner, each the step of forming the latent image and the step of forming the toner image are repeated at least one time, and a plurality of toner images formed on the image retainer to a transfer material. At least one of the toner images is formed with a toner which has a spectral transmissivity as to substantially absorb a visible light but transmit a light having a wavelength of 750 nm or more. The latent image is formed by subjecting the image retainer bearing the toner image to an image exposure with a light containing a wavelength component of 750 nm or more.

Abstract: A developer reservoir in which a flexible seal member is separably bonded to the circumferential surface of an opening in a bottom portion of a reservoir body containing a developer for sealing the same opening. A portion extended from the bonded flexible seal member is spot-bonded on a plurality of portions of the bottom portion of the reservoir body so that when a considerably large pulling out force is applied to the seal member the seal member is separated first from the spot-bonded portions of the bottom portion of the reservoir body and then from the circumferential surface of the opening of the reservoir body. A sliding cover is also included below the seal member so that the sliding cover can be drawn in a right angle direction to the separating direction of the seal member.

Abstract: A light-sensitive silver halide color photographic material having photographic constituent layers including a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer on a support, wherein the content of silver bromide of the silver halides in the green-sensitive silver halide emulsion layer and red-sensitive silver halide emulsion layer is 5 to 65 mole %, and the green-sensitive silver halide emulsion layer contains at least one of the compounds represented by the formula shown below: ##STR1## wherein X represents a halogen atom or a monovalent organic group eliminable through coupling reaction with an oxidized product of a developing agent; R.sub.1 to R.sub.

Abstract: A curling prevention device of a thermal developing machine is provided at the outlet of a thermal developing and/or transfer step and thereafter with a correcting guide passage having a bend in the opposite direction to the direction of curling appearing in the step, the device being adapted to permit a thermal developing light-sensitive material to pass with a temperature of 50.degree. C. at least at the inlet portion of the correcting guide passage.

Abstract: A process for producing a silver halide photographic paper that has on a support at least one photographic constituent layer incorporating a silver halide developing agent and at least one photographic constituent layer containing both a polymer latex and an emulsified dispersion of an oil-soluble fluorescent brightener dissolved in a high-boiling point organic solvent wherein said emulsified dispersion is preliminarily mixed with said polymer latex, the resulting mixture then being incorporated in a selected photographic constituent layer.

Abstract: An image forming method which employs an electro-photographic photoreceptor having high sensitivity, high resistance to damage, high durability, and high resistance to ozone oxidation. The method comprises charging the surface of the photoreceptor with positive charge, the photoreceptor including a photoconductive base, a photoreceptive layer formed on the base and consisting of at least a layer having a charge transport function and a layer having a charge generating function, and a resin-containing non-photoreceptive layer formed on the photoreceptive layer as required, and in which one layer placed above the layer having a charge transport function contains an antioxidizing agent, forming an electrostatic latent image on the surface of the photoreceptor by image-like exposure, then developing the electrostatic latent image.