Printer controller

Abstract

Abstract PURPOSE:To shorten the period of time from the end of printing to the start of the next printing, by discriminating whether an operation is normal or an error is generated based on the information on the presence or absence of a paper, a count and a printing condition when a time set on a timer means is up. CONSTITUTION:When a paper discharge signal is inputted from a laser printer 14, a paper discharge interruption processing is performed, and a counter 12 is decremented by 1. When a time-up signal is inputted from a timer 13, a timer interruption processing is performed. In the processing, it is first discriminated whether a paper is present in the laser printer. When the paper is present and the count on the counter 12 is '1', it is discriminated whether printing is being conducted. When the answer to the discrimination is YES, it is judged that the operation is normal, and the interruption processing is finished to return to a main routine. When the count on the counter 12 is '2' or when the answer to the discrimination of whether printing is being conducted is NO, there is a high possibility of the paper being jammed, so that it is judged that an error has been generated, then the printing operation is stopped, and an error alarm is issued.

Inventors

• 👤 Masahiro Tsunekawa
• 👤 常川　雅博

Bibliographic Details