Abstract: An image forming apparatus includes: a storage unit that stores an identifier and a remaining sheet length of a roll sheet after an image formation has been finished; a specifying unit that specifies sheet lengths of pages where images are to be formed based on an image forming instruction, and a number of the pages; a computing unit that calculates a sheet length required for an image formation in accordance with the image forming instruction based on the specified sheet lengths and the specified number of the pages; and a selection unit that selects a roll sheet for the image formation in accordance with the image forming instruction based on the calculated sheet length and the stored remaining sheet length.

Abstract: An image processing apparatus includes the following elements. An image information generator generates, in response to an instruction, print image information to print plural pieces of image information in parallel in plural columns. A division manager divides the print image information into regions, each region having a length equal to the greatest common divisor of lengths of the image information. A manager manages, every time a printing operation is performed, the regions subjected to the printing operation such that the regions are divided into print guaranteed regions and print non-guaranteed regions. A print restart region determining unit determines, upon detection of an occurrence of an abnormality during the printing operation, a print restart region after recovery from the abnormality is completed on the basis of the print guaranteed regions and the regions of the print image information.

Abstract: An image processing apparatus includes the following elements. An image information generator generates, in response to an instruction, print image information to print plural pieces of image information in parallel in plural columns. A division manager divides the print image information into regions, each region having a length equal to the greatest common divisor of lengths of the image information. A manager manages, every time a printing operation is performed, the regions subjected to the printing operation such that the regions are divided into print guaranteed regions and print non-guaranteed regions. A print restart region determining unit determines, upon detection of an occurrence of an abnormality during the printing operation, a print restart region after recovery from the abnormality is completed on the basis of the print guaranteed regions and the regions of the print image information.

Abstract: An image forming apparatus includes: a storage unit that stores an identifier and a remaining sheet length of a roll sheet after an image formation has been finished; a specifying unit that specifies sheet lengths of pages where images are to be formed based on an image forming instruction, and a number of the pages; a computing unit that calculates a sheet length required for an image formation in accordance with the image forming instruction based on the specified sheet lengths and the specified number of the pages; and a selection unit that selects a roll sheet for the image formation in accordance with the image forming instruction based on the calculated sheet length and the stored remaining sheet length.

Abstract: In a print server device, print data reading and a printing process are performed in parallel so as to reduce the printing time and the printing order of print jobs is automatically or optionally changed. A print server device 1 stores print data of a print job 3 accepted thereby, reads out the print data in accordance with a print request command and has the read out print data analyzed and processed at a device control filter 8 for output to a printer 2. A control unit 9 sequentially reads out the print data for supply to the device control filter as a part of the print data is started to be stored. In addition, the control unit 9 puts the print job in a print wait condition. The print jobs are selected in accordance with a priority following a specific condition so as to be released from the print wait condition, and the print data of the print files is read out for supply to the device control filter.