| 摘要 |
A printer equipped with a copy function is capable of carrying out a two-set double-sided printing, using a series of printing papers, each of which has a printed content on one side and a blank page on the other side. With the aid of a built-in processing unit, such a series of the printing papers are regarded as serial pairs of two adjacent printing papers, and an image on one side of each printing paper is read by an image sensor, and then copied on the other side of the printing paper adjacent thereto. When the number of all the printing papers is odd, an image read on one side from the last printing paper is copied on one side of a supplementary paper sheet. When the total number n of the printing papers initially read out is even, printing paper are sequentially fed to said image printer, and printing papers, each of which is placed on a paper feed tray for printing in such a manner that its blank page on the other side is printable, are received in the order of reading by the image printer. The printer proposed herein ensures to save the paper sheets to be used along with easy operation in the printing.
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