Abstract: This specification discloses an image formation apparatus which is provided with an original reading-out scanner for converting an original image into a video signal and in which an original supporting table for supporting an original thereon comprises an input device capable of indicating and inputting any coordinates and the original reading-out scanner is provided in opposed relationship with the original supporting table.

Abstract: The present invention provides a laser beam printer which comprises a beam source for emitting a beam corresponding to an image signal, a photosensitive member for forming an electrostatic latent image thereon with the beam, a polygon mirror for reflecting the beam emitted by the beam source to scan the photosensitive member with the beam, an image forming lens provided between the polygon mirror and the photosensitive member in the optical path of the mirror for focusing the reflected beam from the polygon mirror on the surface of the photosensitive member, a box accommodating the beam source, the polygon mirror and the image forming lens therein and having a window for passing therethrough the beam from the image forming lens toward the photosensitive member, an optical filter provided over the opening of the window, and light blocking means disposed in an optical path along which a portion of the beam reflected from one of the mirror faces of the polygon mirror travels toward the image forming lens again a

Abstract: A control circuit (17) applies a voltage pulse to a piezoelectric transducer (16) to create pressure in a chamber (10) open to an ink reservoir (14) at one end and closed by an ink nozzle (13) at the other. The control circuit (17) generates a pulse formed by one or two waves, each comprising a secondary portion delayed relative to the primary portion by a time which is double the reflection time that is characteristic of the chamber (10), thereby cancelling reflection of the drop expulsion pressure. The form of the wave is determined by a series of variable resistors disposed in the circuit while the time is regulated by an element for regulating the period of oscillation of the circuit. Alternatively the form of the wave is recorded in digital form in an ROM addressed by a counter while the period of oscillation is regulated by acting on a timer for controlling the counter.

Abstract: A light beam scanning apparatus in which light beams are modulated by image information signals and the modulated light beams are directed onto a photosensitive body consists of a light source which produces light beams in which the light energy distribution takes the form of a normal distribution, a 1st scanning unit which causes the light beams produced by the light source to scan in a 1st direction with respect to a photosensitive body, a 2nd scanning unit which causes the light beams produced by the light source to scan in a 2nd direction that is normal to the 1st direction, an image formation means by which an image constituted by continuous or discontinuous dots is formed on the photosensitive body following scanning in the 1st and 2nd directions and a light source lighting control means which connects to and lights the light source and which alters the beam dot diameter by altering the normal distribution of the light beam of the light source.

Abstract: Hot melt ink is maintained in a solid state. When ink is called for in the reservoir of a scanning imaging head, the head is moved to a position coupled to the solid state ink whereupon the ink is melted coupled into the reservoir of the imaging head.

Abstract: A non-impact printing apparatus in which an ink carrier film is formed to have a plurality of holes or recesses, the holes are filled with ink, and then the film filled at the holes with the ink is selectively heated by a thermal printing head according to image information to generate bubbles within the ink in the heated holes and thus to eject the ink onto a printing paper under influence of the pressure of the generated bubbles. The effective diameter of each of hole provided on the ink carrier film is less than the thickness thereof thus improving the image quality.

Abstract: A cartridge for hot melt or phase change ink is tubular, having a cover at one end and an opening at the other end. Upon engagement and cooperation between the cartridge and a reservoir, solid ink is dropped under the influence of gravity through the opening in the cartridge. Solid ink is retained in the cartridge until such cooperation, which includes keying the cartridge to the reservoir and forming a seal of the inlet to the reservoir between the cartridge and the reservoir.

Abstract: For requirements where constant velocity is important and positional error must be small and non-cumulative, a bipolar or unipolar, two-phase, permanent magnet stepper motor is driven by sawtooth currents in such manner as to produce a rotating magnetic field that exerts a substantially constant torque on the rotor. When using a bipolar stepper motor with windings electrically offset by 90.degree., two drive currents are generated that increase and decrease in amplitude linearly between predetermined maximum and minimum values. With a unipolar motor, four sawtooth waveforms, of single polarity, are provided. In either case, the currents are displaced by 90.degree. to produce a rotating magnetic field of uniform amplitude.A microprocessor controls the generation of a number of voltage ramps that control current generators for either the bipolar or unipolar stepper motor.

Abstract: An optical recording disk wherein information is written and reproduced through the application of recording and reading laser beams is assembled by preparing a pair of circular substrates which each are provided with a plurality of studs or spikes on outer and/or inner circumferential band, forming a recording layer of dye on each substrate, and joining the substrates together through the studs by ultrasonic sealing or adhesive bonding such that the recording layers face one another via an interior space.

Abstract: A printer having holographic scanning disc for scanning the imaging beam from a laser diode across a recording member, the diode having diode biasing and modulating current inputs for modulating the diode and thereby exposing and creating images on the recording member, a heating-cooling device in heat exchange relation with the diode for controlling diode temperatures, and a current sensor for monitoring the diode biasing and modulating currents and operating the heating-cooling device to adjust diode temperatures to maintain diode temperatures within a non-mode hopping temperature range.

Abstract: A recording apparatus capable of recording characters and graphical representations, having a display which is adapted to display a special symbol together with the characters, so that the special symbol indicate the position of a graphical representation to be recorded before or after a written description or between written descriptions. The apparatus may have a display which has at least one indicator area adapted to effect selective display of each one of numerical values of plural groups of numerical data in a memory, which are recorded in a graphical or tabular form. The desired one of the numerical values of the desired one of the numerical data groups is dsiplayed by designating corresponding one of blocks of a hypothetical table defined by rows and columns. When one block of the hypothetical table is designated while the numerical value corresponding to another block adjacent to that one block is displayed, the numerical value corresponding to the designated block is displayed.

Abstract: An optical printer includes an optical printing head and a photosensitive member. Although quiet and fine printing can be performed when a light emitting diode array is employed as the optical printing head, there have been problems, on the other hand, such as difficulty in driving and difficulty in adjustment of primary factors directly affecting the printing quality such as uneveness in dot pitches and intensity. Therefore, the present invention copes with driving conditions by effectively distributing data transferring during static driving, thereby to improve the printing quality by selective printing timings.

Abstract: A light beam scanning apparatus in which light beams are modulated by image information signals and the modulated light beams are directed onto a photosensitive body consists of a light source which produces light beams, a first scanning unit which causes the light beams produced by the light source to scan in a first direction with respect to a photosensitive body, a second scanning unit which causes the light beams produced by the light source to scan in a second direction that is normal to the first direction, an image formation means by which an image constituted by continuous or discontinuous dots is formed on the photosensitive body following scanning in the first and second directions and a speed control means which controls the speed of light beam scanning brought about by the first scanning unit in a manner such that the density of dots successively formed in the second direction is made variable.

Abstract: A printer having holographic scanning disc for scanning the imaging beam from a laser diode across a recording member, with a detector for detecting a shift in wavelength of the diode utilizing the zero order beam passing through the holographic scanning disc and a temperature control for controlling diode temperatures, the detector actuating the temperature control to adjust the temperature of the diode when a shift in the wavelength of the zero order beam from a non-mode hop wavelength to another wavelength is detected, adjustment of the diode temperature shifting the beam wavelength back toward the non-mode hop wavelength region.

Abstract: A scanning system with unpolarized laser, a birefringent beam splitter to split the unpolarized beam into dual orthogonally polarized beams, a polarization insensitive unitary dual beam modulator for separately modulating the beams in accordance with discrete image signal inputs, and a control for operating the modulator at optimum acoustic power levels.In an alternate embodiment, a quarter wave plate is inserted in the optical path between laser and beam splitter.

Abstract: A recording apparatus capable of recording a graph according to graphic pattern data representative of a pattern of the graph, and graph data representative of values to be presented in the graph. The apparatus includes a control device for effecting and controlling relative movements between recording instrument and medium, a setting device for determining a maximum X-axis recordable range and a maximum Y-axis recordable range, a checking device for judging if an X-axis plotting range and a Y-axis plotting range which are necessary to record the graph exceed the X-axis and Y-axis recordable ranges, respectively, and an indicator for indicating the axis along which a plotting area defined by the X-axis and Y-axis plotting ranges extends beyond a maximum recordable area defined by the maximum recordable ranges.

Abstract: A recording apparatus and, more particularly, a so-called thermal printer employs a thermal head as a recording head. A platen roller is in pressing engagement with the recording head and recording elements pass between the two. Biasing forces exerted on opposite ends of the recording head cause it to deform slightly. To accommodate for this deformation, the diameter of the platen roller is greater in the middle than at its opposite ends. This construction assures that both the recording head and the platen roller are pressed against each other under a uniform force, so that ink density irregularity on the recording paper, creasing of the recording paper and the ink sheet, and recording density irregularity resulting therefrom can be prevented, and thus stable recording performance can be assured.

Abstract: A recording apparatus having character keys, and selector keys for selecting one of a plurality of recording modes for each of at least two recording conditions selected from a plurality of conditions such as a recording direction, a character size, a recording color, and a line spacing. The apparatus includes a primary indicator, responsive to an operation of one or more of the selector keys to change at least one of the at least two recording conditions from one recording mode to another, for displaying a single special symbol to indicate the change of the at least one recording condition, without specifying the changed recording condition or conditions and the newly selected recording mode or modes of the changed condition or conditions.

Abstract: A laser printer is disclosed with three separate channels. Each channel includes a gas laser which projects a beam at a particular wavelength along the channel optical axis. A beam combiner receives the light beams from the three channels and combines them to form a combined beam spot at a registration plane. The combined beam spot is relayed to a polygon which scans the beam onto a receiving medium. In order to minimize laser pointing errors and eliminate artifacts in the image, optical means are provided for adjusting the size of the beam for optimum operation and for making the combined beam spot optically conjugate with a plane in each channel at a preselected point in the channel from which the pointing errors originate.

Abstract: A method and an arrangement for recovering an analog signal E(t) and for displaying and/or processing it, for example, on an oscilloscope as a useful recovered signal X(t), in the envelope display mode and/or in the signal display mode. In the method, the average values of the k results are determined which are obtained after multiplication of the analog signal E(t) by the function f.sub.k (t) chosen as a function of the passband of the analog signal E(t). These average values can also be obtained by means of a filter having a pulse response h.sub.k (t), where h.sub.k (t)=f.sub.k (.tau.-t). The filter has at its k outputs transmittances h.sub.k (t). These average values permit of calculating k coefficients S.sub.k, which serve to determine the calculated recovered signal S(t).