Abstract: The present invention provides an ink dot printer wherein an electrostatic field is produced between ends of needles and an electrode, and the needles are selectively actuated to cause ink sticking to the ends of the needles to fly with a Coulomb force thereby to form dots with ink thus flown on record paper which covers the electrode without contacting the needles with the record paper. By this construction, noises are signficantly reduced and the ends of the needles are not damaged while printing results of a high resolution can be obtained. In addition, a tapered configuration of the ends of the needles will facilitate separation of the ink from the needles, assuring the uniformity of dots in shape and size. In case a positive voltage is applied to the electrode while the needles are grounded, treatment for insulation can be performed easily, allowing production of printing heads with ease and at a reduced cost.

Abstract: An ink dot printer includes an ink tank for storing magnetic ink, a pair of magnetic pole plates arranged opposite to each other to form a slit, one end of the pair of plates being immersed in the magnetic ink in the ink tank. An electromagnet magnetizes the paired magnetic pole plates to introduce the magnetic ink in the ink tank into the slit to form a magnetic ink film therein, and a plurality of needles arranged adjacent to one another in the longitudinal direction of the slit are each freely movable in the longitudinal direction of the needle between a first position where its one end portion is immersed in the magnetic ink film in the slit between the paired magnetic pole plates and a second position where its one end portion is projected from the magnetic ink film in the slit.

Abstract: A piston ring with a nitriding layer on entire surfaces thereof except an outer peripheral surface, and a plating or a spraying layer on the outer peripheral surface of the piston ring.

Abstract: An ink dot printer comprises: an ink tank storing magnetic ink; a pair of magnetic pole plates arranged opposite to each other to form a slit whose one end is immersed in the magnetic ink in the ink tank; an electromagnet magnetizing the paired magnetic pole plates to introduce the magnetic ink in the ink tank into the slit to form a magnetic ink film therein; a plurality of needles arranged adjacent to one another along the longitudinal direction of the slit where each is freely movable in its longitudinal direction between a first position where its one end portion is immersed in the magnetic ink film in the slit and a second position where its one end portion is projected from the magnetic ink film in the slit; electromagnets for selectively driving the needles to move from the first position to the second position; and stoppers which collide with the needles in the course of their moving from the first position to stop the needles at the second position; wherein the driving force produced in the electroma

Abstract: An ink dot printer includes an ink tank having a magnetic ink supplying hole and an air opening; a pair of magnetic pole plates arranged to form a slit one end of which is immersed in magnetic ink in the ink tank; and an electromagnet for magnetizing the magnetic pole plates to introduce the magnetic ink in the ink tank into the slot to form a magnetic ink film. A plurality of needles arranged adjacent to one another along the longitudinal direction of the slit are each freely movable in its longitudinal direction between a first position where one end portion is immersed in the magnetic ink film in the slit, and a second position where the one end portion is projected from the magnetic ink film. Electromagnets selectively drive the needles to move them from the first position to the second position, wherein the needles selected force the magnetic ink adhered on their one ends at the first position, onto a recording paper to form dots of the magnetic ink.

Abstract: In a light beam scanning type recording system in which a part of a read-out light beam scans a form slide and another part of the read-out light beam scans a linear encoder to generate photoelectric pulses, a data signal is read out by use of a video clock signal, and a recording light beam is modulated by a video signal obtained by combination of the data signal and the form signal, a device for correcting displacement of the form slide from a predetermined position with respect to the data information is provided. An optical mark is provided on the form slide in the marginal area thereof and a mark signal is generated when the read-out light beam passes through the optical mark. The number of clock pulses from a pulse generator is counted after the mark signal is generated and before the first photoelectric pulse is outputed to detect the amount of displacement of the form slide. Then, the video clock signal or the form signal is delayed according to the detected amount of displacement.

Abstract: In a laser beam scanning type image recording system in which a laser beam is deflected horizontally and vertically to perform raster scanning on a recording material, a linear encoder for making a photoelectric pulse signal is provided with an optical mark in the vicinity of the end portion of the raster scanning so that the laser beam crosses the optical mark. The number of the scanning lines crossing the optical mark is counted to detect the fluctuation in amplitude of vibration of a vibrating mirror for vertically deflecting the laser beam. The gain of a driving circuit for driving the vibrating mirror is controlled according to the counted number of the scanning lines crossing the optical mark.

Abstract: In a computer output microfilmer (COM) comprising a computer output read out device having a magnetic recording tape, a central processor unit, and a recording unit, the computer output read-out device is provided with a buffer storage and a data processing device. The data read out from the magnetic recording tape are stored in the buffer storage and read out therefrom under the control of the data processing device. Thereby, the steps of reading out the data of page (N+2) from the magnetic recording tape, processing the data of page (N+1) in the central processor unit, and recording the data of page (N) in the recording unit are conducted in parallel.

Abstract: A form combining and recording device wherein form data and print data are combined in a single frame memory. A separate frame designation memory is provided for determining whether the contents of a particular location in the frame memory are print or form data. Form data is given priority for the read-in operation. For the recording of information from the frame memory, characters are written with one character font type for print data and a different font type for form data so that the two may be readily distinguished.

Abstract: A light beam scanning and recording device for optically reading a form slide with a raster scan, combining a signal representing the form with a data signal and recording the combined information on a recording sheet also using a raster scan. A portion of a beam scanning the form is split off and directed through an optical encoder device having an alternating transparent and opaque pattern. A detected signal from the encoder is used to detect shifts in the raster scan pattern and to consequentially properly align the data signal with the form information by controlling a clock signal synchronizing the data signal. A common optical system including vertical and horizontal beam deflectors is employed for both reading and recording beams.

Abstract: In an image recording or displaying system using a light beam scanning means, format lines are generated in combination with character data to be recorded or displayed together therewith. A format line data memory memorizes the format line data and the output format line data read out therefrom are combined with the character data. The format line data memory is provided with a horizontal pattern memory and a vertical pattern memory. The horizontal pattern memory memorizes various horizontal patterns in the direction parallel to the scanning line of the light beam scanning means. The vertical pattern memory memorizes the kind of the horizontal pattern according to the position of the scanning line. The vertical pattern memory generates the horizontal pattern code according to the scanning line signal and the horizontal pattern memory generates the selected horizontal pattern for every scanning line.

Abstract: A format pattern carried on a format transparency is photoelectrically converted into an electric signal. The electric signal representing the format pattern is inputted into an "exclusive-or" circuit together with a character pattern signal representing output information of a computer. The output of the "exclusive-or" circuit controls an on-off modulator which modulates a laser beam for recording the output information of the computer. The modulated laser beam is deflected by a beam scanner to scan a photosensitive or heat sensitive film to record thereon the format pattern together with the computer output information.

Abstract: A dot character recording device in which a recording surface is scanned with a laser beam modulated in accordance with the dot patterns of characters to be recorded. The time width of the modulating signal is adjusted in accordance with the beam position in order to maintain a constant scanning line and hence character dot width. Preferably, the pulse width of the modulating signal is increased in the scanning direction at recording positions where the density of the beam would otherwise be low so as to apply additional optical energy.