Abstract:
Color image forming apparatus includes a belt-shaped image carrier stretched and conveyed around rotating rollers on which image exposure is conducted by a plurality of exposure units; and a plurality of step-formed supporting surfaces below the lower surface disposed of the image carrier. The stepped formation of the exposure unit supporting surfaces avoids interference between optical paths of laser beams for image exposure, and facilitates compactness of the apparatus. The belt-shaped image carrier and the supporting surfaces are provided at a relative angle of 5-30 degrees. The color image forming apparatus is also capable of detecting a specific pattern outputted from the exposure units; calculating the differences of positions of the specific pattern as formed by the different exposure units; and controlling the positioning of the specific pattern as outputted by the exposure units, so as to increase the accuracy of the image forming apparatus.
Abstract:
A method of controlling the reception of data comprising a step for storing 1-page units of data which may be one or more times read out, in a receive buffer capable of storing a plurality of the 1-page units; a step for establishing a page pointer for indicating a starting address of the 1-page unit, when it is read out from the receive buffer; a step for erasing the page pointer of the 1-page units which are not required to be read out for a second time; and a step for rereading out the 1-page unit whose starting address is indicated by the page pointer, when rereading-out is required, wherein the page pointers are erased in order of the 1-page units having been established thereof.
Abstract:
An oscillation circuit having multiple separately addressable oscillator stages for applying RF voltage across selected capacitive loads where each stage includes a power driver, a transformer and a quench/clamp circuit. The oscillation circuit includes one enablement circuit responsive to an externally applied enablement signal and address signal and a common feedback circuit connected between one end of all of the transformers and the enablement circuit. An externally applied address signal and an enable signal selects a particular oscillator stage and initiates action of a power/driver circuit to provide an initial pulse of AC current through the associated transformer for a preset period and the feedback circuit detects negative zero crossovers of the waveform of current through that transformer primary to maintain actuation of the driver circuit for as long as the external enable signal is present.
Abstract:
A color copying machine is provided with a color signal input unit for inputting red, blue and green signals representing the colors of a document, a recording unit for recording the color picture of an original color picture on the basis of printer control signals for controlling a cyan printing by using a cyan toner, a magenta printing by using a magenta toner and a yellow printing by using a yellow toner and a processing unit which changes the color signals including the red, blue and green signals into the printer control signals related to the cyan, the magenta and the yellow by using a matrix representation in conformity with a predetermined rule to produce cyan, magenta and yellow printer control signals. A surface-finishing mode selecting button allows an operator to select either a glazed finish to the recording sheet or an unglazed finish after recording the color picture thereon. The CPU determines one set of parameters to be used by the processing unit from a plurality of sets of parameters stored in the ROM according to the selected surface-finishing mode. The processing unit modifies the input color signals by using the predetermined parameters, according to the selected surface-finishing mode, and the recording unit records a color picture on a recording medium. The glazing unit glazes, or finishes, the printed recording medium according to the selected surface-finishing mode.
Abstract:
A programming language optimized for the specification of inks for a printing system using two colorants, black plus a highlight color. The first group of statements name the primary colors such as black and red or magenta. Next specified are the catalog name and the palettes which make up the catalog. A palette is a collection of inks, each ink being defined as a tile composed of two bit maps which together are referred to as a screen, each bit map identifying the pixels in the tile to be printed in the associated primary color. Each bit pattern line is specified in the language by an equivalent binary number.
Abstract:
There is disclosed a color copier or the line in which an original image is separated into plural image signals of different color components, which are repeatedly subjected to a determined signal process to reproduce the original image with an improved image quality and with a simple structure.
Abstract:
An image recording system including a host control unit for supplying image data representative of the images to be printed on a record medium and a printer apparatus for forming printed images on the record medium on the basis of the data received from the host control unit, wherein the printer apparatus comprises an image transfer drum having a photoconductive surface, two or more image developing units responsive to the image data for forming a page of electrostatic latent images on the photoconductive surface, change-over means operative to selectively activate any of the image developing unit into operation, electrostatic chargers and charge erasers for transferring the page of electrostatic latent images on the photoconductive surface to the record medium, characterized in that the host control unit is operative to further supply control data predominant over the modes and conditions in which the images are to be printed on the record medium, the control data containing color data specifying a color or colors in which printed images are to be formed on the record medium and in that, when one of the image developing unit is in operation forming a page of electrostatic latent images on the photoconductive surface, the change-over means activates another image developing unit into operation and de-activates the former.
Abstract:
An image data output apparatus of this invention is connected to an image scanner and a data processor (host computer). The image data output apparatus includes interfaces, a data converter, a video signal generator, an LBP (Laser Beam Printer) engine unit, and the like. Multi-level image data scanned by the image scanner is converted by the data converter into data having a desired data format corresponding to the data processor. The converted data is output to the data processor through the corresponding interface. Meanwhile, the scanned image data is also supplied to the video signal generator and is converted to a drive signal for driving a semiconductor laser of the LBP (Laser Beam Printer) engine unit.
Abstract:
A device for controlling a process of stopping a laser printer having a printing unit including a sensitive drum and a fixing unit. The stopping process control device is provided with a detecting unit for detecting errors occurring in the laser printer, a determining unit for determining whether or not an error detected by the detecting unit is very serious, and a control unit for controlling the printing unit and the fixing unit. The control unit stops the printing unit and the fixing unit after completing a printing and a fixing of the page being printed when the determining unit determines that the error is less serious, and conversely, immediately stops the printing unit and the fixing unit when the determining unit determines that the error is very serious.
Abstract:
An electro-photographic matrix printer such as a laser printer has characters to be printed stored as bits in columns and rows of a bit pattern page memory. The bits are read from the bit pattern page memory in the form of individually addressable blocks of bits, the order of the blocks read from said bit pattern page memory being selected to give a selected degree of rotation to the printed image produced by said printer, with the order of bits within each block being presented to the printer to provide a rotated image within each individually addressable block.