Abstract:
An image forming apparatus includes: an image reading device for reading an image to generate image data; a memory capable of writing and reading data in parallel, for storing the generated image data; an image forming device driven by a scan-writing clock having a frequency different from that of a reading clock of the image reading device for reading the image data stored in the memory, thereby to form the image; and a timing control device for shifting a timing for writing the image data in the memory from the image reading device and a timing for the image forming device to read the image data from the memory, and for controlling the image forming device to continuously read the image data in a predetermined quantity from the memory. The image reading device writes the image data in the memory at a unit of data in the predetermined quantity.
Abstract:
A technique for making multiple copies that includes the steps of scanning a scan region that contains the image to be copied to produce an array of scan region pixel data that contains pixel data for the entire scan region; printing an image based on the array of scan region pixel data; processing the scan region pixel data to determine a subregion of the scan region that contains printable, non-background information; scanning the subregion of the scan region and providing to a print buffer print data only for the subregion of the scan region that contains printable, non-background information; and printing an image based on the subregion print data.
Abstract:
In an image forming apparatus for reading a document image and forming the document image on a paper, document image data are divided into a plurality of blocks and the document image data are compressed in the unit of block to be stored in a first memory device. The data read from the first memory device are expanded in the unit of block to be stored in a second memory device. Compression time and expansion time are estimated and image output start time for a printer is set based on the compression and expansion times before expansion of all the blocks is completed. In a different way, the start time is set to read data from a second memory device by a printer for printing, after estimation based on expansion time on data not yet expanded by an expansion device. In a still different way, predetermined form data such as page number are superposed with image data. The form data is drawn first in a page memory device and expanded image data are superposed next in the page memory device. Print is started by taking drawing time of the form data into account.
Abstract:
A facsimile apparatus having a printer function for local or remote printing out of image data from a computer, and a scanner device which reads an original document and produces corresponding image data for transmission and remote printing. A printer control device controls a connection with the computer to receive image data from the computer. Image device from the printer control device is processed using the same processing mechanisms as image data from the scanner device, and applied to a communication device capable of sending the image data in the form of facsimile data to a destination facsimile apparatus. The processing mechanisms include a memory which stores the image data from either the scanner device or the printer control device, and outputs the stored image data to the communication device for transmission as the facsimile data.
Abstract:
A facsimile device comprises read means for reading a document; image memory means for storing image information of the document read by the read means; transmission means for transmitting the image information of the image memory means; and control means for controlling the reading of the document, the storing of the read image information and the reading of the stored image information and parallelly executing the storing and the transmission of the image information. The control means reads the document asynchronously with the transmission of the image information until the amount of image information in the image memory means reaches a predetermined amount.
Abstract:
An image processing system with a buffer memory for use in a facsimile device. An image processing apparatus comprising an image read unit for operating continuously to read an image on an original document, a buffer memory for temporarily storing image data of the image on the original that is read by the image read unit, a compressing unit for compressing the image data stored in the buffer memory into code data, and a buffer memory controller for controlling the operation of writing the image data into the buffer memory and the operation of reading the image data from the buffer memory. The image data processing device with buffer memory, which can continuously operate an image input terminal and/or an image output terminal, using a buffer memory which has a less number of the memory elements than a page memory.
Abstract:
A facsimile device comprises read means for reading a document; image memory means for storing image information of the document read by the read means; transmission means for transmitting the image information of the image memory means; and control means for controlling the reading of the document, the storing of the read image information and the reading of the stored image information and parallelly executing the storing and the transmission of the image information. The control means reads the document asynchronously with the transmission of the image information until the amount of image information in the image memory means reaches a predetermined amount.
Abstract:
A pair of rollers spaced at a predetermined interval are arranged in the bottom part of a facsimile machine. When the facsimile machine is manually moved on an original document while pushed against it, the rollers rotate. Detecting the rotation of the rollers, an encoder performs power on/off operations, i.e., enables/disables the supply of an electric power from a compact power supply unit, in accordance with the start/stop of the roller rotation. Upon the power on, an image sensor starts to read the document. An image signal produced by the image sensor is processed by a signal control unit, and then modulated by a G3 modem. The modulated signal is sent out to a telephone line via a network control board.
Abstract:
An electronic reprographic system with a scanner for scanning the document pages of a job and converting the document images scanned to pixels, a printer for making prints of the documents from the pixels in accordance with job programming instructions, a controller section with memory for use by both the scanner and the printer simultaneously, the scanner and printer operating asynchronously with respect to one another, the ability to abort scanning of a document when either the scanner or printer runs out of allocated system memory during operation, the system memory getting reallocated in preparation of a new scan, and the document that was not completely scanned getting rescanned.
Abstract:
An image recording apparatus for scanning a print head of predetermined width in a main scanning direction and successively displacing a recording medium in a subscanning direction thereby forming an image on said medium. The constitution of the apparatus is shown in FIG. 4A and an arrangement is provided whereby the remaining print width of the recording medium, after the last print line of predetermined width, is calculated and the recording medium is displaced by the remaining width in the subscanning direction before printing of the last line. The constitution of the apparatus further includes a platen with suction holes for chucking the recording medium during recording and an arrangement for reducing the suction area on the platten at the time of printing of the last line.