Canon Aptex Kabushiki Kaisha

Canon Finetech Inc.

Shinichi Saijo

Akira Katayama

Moriyoshi Inaba

Kenichi Moritoki

Masahide Hasegawa

Kouhei Ishikawa

Yuzo Wada

Kohei Ishikawa

Jouji Odaka

Naohisa Obata

This invention provides a printing apparatus and an information processing apparatus which can process precise information on the number of pixels printed by nozzles of the print head without degrading throughput and properly manage the service life of the print head. To this end, a plurality of nozzles of the print head are divided into a plurality of blocks and a nozzle in each of the blocks which prints a maximum number of pixels in a predetermined unit print volume is taken to be a representative nozzle. In each of the blocks, the numbers of pixels printed by the representative nozzle for every unit print volume are accumulated and managed.

Printing apparatus and image processing apparatus

A printing method and apparatus in which basic image data and information of the printing position of the image data on a recording medium are input from a data source and stored in advance, and the designated image data is bitmapped at the printing position to print an image, thereby increasing the printing speed, and a printing system including the printing apparatus. In this system, image data sent from a host is registered as a basic image, and the image is bitmapped in an image memory on the basis of the information of the printing position, of the stored basic image data on a printing paper sheet, sent from the host. The image data bitmapped in the image memory is then output to a printhead to print the image. When the bitmapped image data is to be copied to a print buffer on the basis of an image copy command, the copy operation is preferably performed concurrently with registering operation for an image management table and bitmapping operation for an image registration buffer which are performed when image data different from the image data to be copied is input. In addition, the registered image data may be stored in one print buffer, and the registered image data may be copied to another print buffer on the basis of another command. Printout operation may be performed on the basis of the copied image data.

Printing method and apparatus and printing system including printing apparatus

An ink-jet printing apparatus receives image data from a host computer and prints the image data. If an elapsed time from an end of printing processing for one printing job to start of printing processing for the next job is less than a predetermined time period, printing processing for the next job is started, without subjecting ink-jet heads to a recovery process, following the end of printing processing for the one job. The recovery process is carried out not only when the predetermined period elapses but also whenever processing for printing on a predetermined amount of printing medium is executed.

Ink-jet printing method and apparatus therefor, and printing system including said apparatus

Upon reaction of data from a host computer, an image forming apparatus analyzes the data, and maps bitmap images onto corresponding image memories in accordance with the analysis result. When it is determined that the data includes a barcode image, non-barcode image data mapped on the black image memory is OR-mapped onto the cyan, magenta, and yellow image memories. The barcode image is mapped onto the black image memory to print.

Image forming apparatus and method for selecting print heads especially for barcodes

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Yokohama, Japan

Shinichi Saijo