| 摘要 |
PURPOSE: A method for printing data on both sides of papers is provided to improve the printing speed and printer memory efficiency by performing the printing data according to a sequence converted from the sum of pages to print and numbers of each page to print. CONSTITUTION: A method for printing data on both sides of papers includes the steps of converting print data composed by a computer program to a data readably by a printer(s203) and determining whether both side printing is to be performed or not(s205), detecting a printing condition such as a sum of pages of a document to print and a page number of the document to print if the both side printing is determined to be performed(s206), adding a null page including null data without any information for a last page of the printing data (s212) when the sum of pages to print is an odd number(s211), and converting the printing data added with the null page to a sequence of pages proper for the both side printing and transmitting the sequence to the printer(s210), wherein the printing data of an even page is transmitted to the printer first rather than that of an odd page.
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