Paper size determining method and printer in which the method is used

摘要

A method of printing on a printing medium is provided, including providing a printing head for printing on a recording medium and conveying the recording medium in a first direction with a conveyer. A detector is positioned on the upstream side of the print head, the detector then detecting a trailing edge of the recording medium. The amount of recording medium conveyance by the conveyer upon the detection of said trailing edge is computed and it is determined whether the recording medium is of a standard size. Thereafter, a printing region on the recording medium is defined in accordance with the size of the recording medium if the recording medium is a standard size. A printer for printing on a printing medium which employs the above method is also provided wherein a detector is positioned upstream of the print head for detecting a trailing edge of the recording medium which is being conveyed. A computer computes the amount of the recording medium conveyance by the conveyer upon the detection of the trailing edge by the detector, and a size determiner determines whether the recording medium is of a standard size and defines a printing region on the recording medium in accordance with the size of the recording medium if the recording medium is of a standard size.