Abstract:
An image recording apparatus includes a rotationally driven image carrier; a position signal output device for outputting a position signal indicating that the image carrier is at a predetermined rotational position; a scanning device for scanning a photosensitive drum with a light beam which is modulated in accordance with the image signal; a beam detection signal generating device for generating a beam detection signal upon detection of the light beam at a predetermined position, so as to regulate the timing of the light beam modulation by the image signal for each line of scan; an image transferring/superposing device for successively transferring and superposing on the image carrier a plurality of color image components which are successively formed on the photosensitive drum based on the image signals which are input in response to the position signals for formation of respective color image components; a measuring device for measuring the time difference between the position signal and the detection signal for each color image component, and a control device for controlling at least the rotation of the image carrier based on the time difference measured by the measuring device.
Abstract:
An image forming apparatus has an image scanner, a sensor for determining that the image sensor has scanned the front edge of a document, and a controller using main scanning line synchronizing signals and an output signal of the sensor as reference signals. In response to the reference signals, the controller causes at least a writing unit to start writing each image data of particular color and causes a transfer medium driving circuit to start driving a transfer medium. The apparatus allows image components of different colors to be transferred to the transfer medium one above the other in accurate registration.
Abstract:
A facsimile machine has: a reception unit for receiving image data transmitted from a remote facsimile machine at a fixed reception speed; a first memory for temporarily storing the image data supplied from the reception unit; a decoding unit for decoding the image data retrieved from the first memory into record data; a second memory for temporarily storing the record data obtained by the decoding unit; a recording unit for performing a recording operation for each cut sheet with the record data, at a recording speed having a value corresponding to the reception speed; a memory unoccupied area amount detection unit for detecting at least one of the amount of a remaining memory area in the first memory unoccupied by the image data and the amount of a remaining memory area in the second memory unoccupied by the record data; and a recording speed changing unit for selectively changing the value of the recording speed to another value faster than the value when at least one of the first memory unoccupied area amount and the second memory unoccupied area amount detected by the memory unoccupied area amount detection unit is equal to or less than corresponding one of first and second predetermined threshold values, the recording speed changing unit controlling the recording unit to perform the recording operation for each cut sheet at the selectively changed recording speed.
Abstract:
Image input apparatus and method having reading density control includes a driver for driving a scanner which reads an image. Discriminating circuitry is provided for discriminating (i) a type of software (e.g. OCR or image processing) used in the apparatus, or (ii) a type of character (e.g. Kanji or Gothic) input to the apparatus, or (iii) whether a reading density of the scanner is adequate for the input character size. Then, control circuitry controls the driver to drive the scanner with a reading density predetermined for the discriminated information type.
Abstract:
A scanner has a frame assembly including a carriage movably mounted in the frame assembly for scanning movement in a scanning path in a first direction along the length of the frame assembly, the frame assembly includes at least one sheet transport path with an indexer to index a sheet through the path; the indexer including at least one index roll mounted on a rotatable shaft having a barrel cam at one end which is actuated by the scanning carriage at the end of the scanning path to rotate the at least one index roll a portion of a revolution.
Abstract:
The color image forming machine such like a color printer or a color copier for forming a color image on a recording sheet. The image forming machine includes a photoreceptor belt; a belt driver for rotating the photoreceptor in a longitudinal direction; a laser beam scanner for repeatedly scanning the photoreceptor in a direction perpendicular to the longitudinal direction, with the laser beam, so that the latent image is formed on the photoreceptor; a developer for developing the latent image with plural color toners; a measuring unit for determining a rotation time of the photoreceptor; and a controller unit for controlling a scanning frequency of the laser beam scanner so that one scanning time of the laser beam scanner is set to the result of dividing the rotation time of the photoreceptor, while the photoreceptor rotates one round, by an integer.
Abstract:
A scanner has a frame assembly containing a carriage movably mounted in the frame assembly for scanning movement in a scanning path in a first direction along the length of the frame assembly from a home position to an end of scan position, the frame assembly including at least one sheet transport path including at least one index roll on a rotatable shaft to index a sheet through the path, the scanner further including a toggle frame supporting at one end at least one idler roll for forming a sheet transporting nip with at least one index roll and at the opposite end at least one sheet registration gate, the toggle frame being pivotally mounted to alternately provide a copy sheet transporting nip and a sheet registration gate in said sheet transport path, the frame being activated to provide a registration gate in the sheet transport path by the scanning carriage when it is adjacent to or at the home position.
Abstract:
An improved image plate scanner (10) for scanning a circular videodisk (12) exposed by X-rays, with image elements (40) spaced a distance (radius R) away from the image plate central point. The image plate is scanned with laser beams. A videodisk carrier (13) on which the image plate is detachably mounted, is drivable with the aid of an electromotor (11), with adjustable rotation speeds. An image element scanning unit (15;115) is radially displaceable across the image plate by means of a drive assembly (14,18) with presettable speed of advance. A laser light supply (42) and an optical image element scanning facility (30a) are parts of an optoelectronic measured value transmission unit, as are a photomultiplier (36) and a signal conditioner. During the light scanning for recording the image stored on the image plate maximum light yield is obtained for the emitted light. The image plate scanner is constructed in a compact manner so as to facilitate operation. The image element scanning unit (15;115) can be guided across the image plate while scanning each image element ( 40) at the same tangential speed, provision being preferably made for the laser light supply (42) to include a collector lens (44), two laser light sources (43a,43b), and an optical filter (46) by means of which the laser light is focussed. The drive shaft (18) of the electromotor (11) is connected by a gear drive to a power spindle (26). The image element scanning unit (15) is translatorily displaceable radially over the image plate (12).
Abstract:
The present invention relates to a facsimile system comprising a reader for reading an original sheet, a recorder for recording an image on a recording sheet, a stepping motor for feeding at least one of the sheets, a drive means for generating a signal by which the stepping motor is driven repeatedly with predetermined excitation modes, and a discrimination means for discriminating an excited phase of the stepping motor. The power down signal is generated when the discrimination means discriminates the fact that the excited phase of the stepping motor is a second phase.
Abstract:
An image forming apparatus for forming an image by deflecting a light beam signal modulated by an image signal onto a photoconductive element by a polygonal mirror to electrostatically form a latent image and developing the latent image. A main scanning synchronization detector is located in the vicinity of the photoconductive element for setting up synchronization in the main scanning direction. A displacement detector detects a distance over which the photoconductive element has been displaced over a period of time associated with a subscanning pitch. Correcting control is driven in response to the output signals of the main scanning synchronization detector and displacement detector. The light beam signal is so deflected in the subscanning direction as to correct an error in the subscanning pitch.