Abstract: An ink jet printer having an imaging drum with a supply of paper within the drum. The paper is transported by rollers mounted on the imaging drum that are controlled by the transverse position of a cutter mechanism that cuts off the imaged paper. The paper passes from the supply spool in the imaging drum through a longitudinal slot in the drum to the outside, around the exterior of the drum, where it is held in place during the imaging process, and then ejected from the drum to the desired length and cut off. While the imaged sheet is being ejected from the drum, the next length of paper is drawn from the drum and around the outside of the drum in position for the next imaging operation. The length of paper that remains projecting from the drum after the imaged paper has been cut off is then withdrawn into the interior of the drum through the longitudinal opening in the drum surface until only a short stub, which will not interfere with the subsequent imaging operation, remains protruding from the drum.

Abstract: In a half-tone recording method and apparatus, half-tone expressing units, each consisting of several recording picture elements, express gradations of density in a document. The recording picture elements in the units are assigned various half-tone levels with the half tone level of at least one of the recording picture elements both increasing and decreasing as the gradation of the half-tone expressing unit increases.

Abstract: A copying apparatus wherein an original supported on an original support is read by a reading head, which produces electric signals corresponding to the image. A recording head forms an image of the original on recording paper in accordance with the electric signals. The reading head and the recording head are in substantially the same place, whereby the size of the apparatus can be reduced.

Abstract: A method and apparatus for generating a beam of radiation in which a beam of coherent radiation (2) is fed to a pair of A/O modulators (3,4). The beam is modulated by the modulator (4) in response to a chopped control function which chops between two levels, one of the levels comprising a reference level (V.sub.low). The radiation beam is sampled at times corresponding to the application of the reference level control function to the modulator (4) and a feedback signal corresponding to the sampled power is fed to a comparator (12) where it is compared with a reference voltage (V.sub.ref). The resultant error signal is applied to the modulator (3) so as to maintain at a substantially constant level the power of the sampled radiation when the chopped control function is at the reference level.

Abstract: An image building apparatus of the type including a scanner section for reading image information of an original placed on the original holding board by scanning it during movement thereof and a printer section for building an image on printing paper by activating the recording head in response to image information transmitted from the scanning section. Arrangement is made in accordance with the order of the scanner section and printer section as seen from the fore side of the apparatus. The scanner section moves in the transverse direction as seen from the fore part of the apparatus, whereas printing paper in the printer section is transported in the direction at a right angle relative to the movement of the scanner section.

Abstract: An apparatus for printing trimming instructions, includes a first means deriving a video signal representative of a photograph image on negative or positive film, a display unit which reproduces a positive video image on a display monitor screen, a second means for accepting trimming data input including data defining the size and shape of a trimming frame on the display monitor screen and data defining the position of the trimming frame on the reproduced video image, third means for storing video signal data and trimming data, and a printer for printing a positive image including the trimming frame.

Abstract: A liquid crystal, particularly a ferroelectric liquid crystal, is interposed between an electroconductive member and an electric charge accepting member to form a liquid crystal device. In the first step of image formation, a uniform polarity of charge is imparted to the entirety or a part of the electric charge accepting member whereby the liquid crystal is uniformly oriented to its first stable state under a uniform electric field thus formed therethrough. In the second step, the reverse polarity of charges are given imagewise to the charge accepting member, whereby the liquid crystal is reoriented imagewise to the second stable state to form an image.

Abstract: An ion generating device includes a plurality of first electrodes extending in a first direction; a plurality of second electrodes extending in the second direction which is different from the first direction, to constitute a matrix; a third electrode so disposed that the second electrodes lie between the first electrodes and the third electrode, the third electrode having apertures corresponding to the matrix; a first dielectric member disposed between the first electrodes and the second electrodes; a second dielectric member disposed between the second electrodes and third electrode, the second dielectric member having a plurality of apertures corresponding to the matrix, which apertures each have a cross-sectional area generally increasing toward the third electrode.

Abstract: There is disclosed a recording apparatus with plural light-emitting elements. The elements are divided into plural groups, and in each group plural light-emitting elements receive image signals simultaneously to improve print quality in relation to subsidiary scanning. Also each light-emitting element is intensity modulated to reproduce a halftone image without the use of dither process.

Abstract: A method for producing printing cylinders for seamless or endless patterns with printing form engraving machines having a scan cylinder and an engraving cylinder. A pattern original on the scan cylinder is opto-electronically scanned picture-element-wise along scan lines lying next to one another which run in a circumferential direction of the scan cylinder, and where every scan line supplies the information for an engraving line of a pattern repeat to be transmitted onto the printing cylinder. The scan original is longer than the pattern repeat (original extension). In a mixing region, picture elements of the original extension and of the beginning of the original stored for every scan line are combined in accordance with a prescribed mixing function to form picture elements having a new density information.

Abstract: A device for monitoring humidity as a function of electrical resistance comprises a humidity-sensitive resistor formed of a ceramic including lanthanum chromite, with or without a dopant selected from titanium oxide, silicon oxide and tin oxide, and having electrodes operably affixed to the surface thereof.

Abstract: An ion generator for the formation of electrostatic images includes two electrodes (a "control electrode" and a "driver electrode") at opposite faces of a solid dielectric member which are electrically actuated to form ions in an air region adjacent the control electrode; a third, "screen" electrode; and an additional, "deflection" electrode, which together with the screen electrode modulates ion flow to an imaging surface. Ions of a given polarity are attracted toward the imaging surface by an accelerating field resulting from a direct current potential of the control electrode. The screen electrode is maintained at a screen potential to control passage of ions through one or more apertures therein, while a further, deflection potential applied to the deflection electrode provides an additional level of control over the size, shape and location of the resulting electrostatic images.

Abstract: An image forming apparatus includes a rotatable mirror for scanningly deflecting a laser beam modulated in accordance with information to be recorded, a movable photosensitive member to be scanned by the modulated laser beam, an assembly for containing therein the rotatable mirror and the photosensitive member. The assembly includes a first part and a second part supported to the first part rotatably about a pivot. The rotatable mirror is located away from the exposure station toward or beyond the pivot.

Abstract: In an image forming apparatus in which an image is formed on a paper sheet in accordance with image information, the feeding path to which paper sheets are supplied is provided with a shape detecting unit to detect the shape of the paper sheets. In accordance with the shape of the sheet detected by the detection unit, the heat transfer unit forms an image within the confines of the sheet.

Abstract: A sub scanning line counter and a main scanning position counter count absolute record-scanning position. A halftone pattern memory outputs binary image output signals for resulting halftone dots in response to comparison of halftone dot density of a halftone pattern partial position previously related with the aboslute record-scanning position determined by count values of the sub scanning line counter and the main scanning position counter with density of the image input signal at that time. A preset value calculating circuit calculates, in case of starting record-scanning from the middle of the recording screen, the count value of the sub scanning line counter corresponding to the scanning start point in advance to starting scanning, thereby to preset the calculated value in the sub scanning line counter.

Abstract: A circuit is disclosed which responds to an input voltage signal for adjusting the voltage applied across electrodes of an electro-optic modulator. The circuit includes two FETs connected in series. These FETs are operated as voltage controlled variable resistances. The electrodes are connected in parallel across one of these resistances. These resistances are vary in response to the input voltage signal to change the voltage applied across the electrodes. The circuit draws low current while providing sufficient bandwidth for exposing high quality images.

Abstract: In an image recording apparatus for recording images by modulating a light beam by information signals and applying the light beam to a recording medium, the longitudinal mode of the light beam is multiple, that is, comprises a plurality of oscillation wavelengths.

Abstract: A facsimile receiver of the type in which a laser beam modulated by a received video signal scans a light sensitive recording paper to print an image corresponding to the video signal. A feedback loop insures that the output of the laser beam acousto-optical modulator (AOM) accurately tracks the demodulated received video signal. A variable transmissivity filter in the path of the laser beam is automatically positioned to provide increased transmittance as the laser beam intensity decreases with aging of the laser, so as to maintain a constant light output intensity. A lens in the optical system which focuses the laser beam on the paper is moved mechanically as the paper is transversely scanned, so that the focus of the beam is varied to compensate for the planar (non-cylindrical) configuration of the paper, thus keeping the beam focused on the paper throughout the length of each scan line.

Abstract: A resistor network having resistor elements disposed equally spaced apart in parallel relation to each other and one or more insulation substrates to which the resistor elements are rigidly mounted. The substrates and the elements are all enclosed in a resin seal in the form of a belt. The resin seal is provided with one or more holes extending through it for dissipating heat. The holes are rectangular in shape, and are disposed between every two of the resistor elements or in other regular manner.

Abstract: A low cost piezoresistive pressure transducer utilizing premolded elastomeric seals and adapted for automatic assembly, and a method of producing the transducer. A piezoresistive stress sensitive element in the form of a diaphram of semiconductor material having a thickened rim is held at its rim between a pair of premolded elastomeric seals in a thermoplastic housing. Electrical connections with external circuitry are made with strain relief jumpers which connect conductive regions on the element outside the seals to conductors which pass through the housing wall.