Sanyo Electric Co., Ltd.

Yuji Houjiyou

Hiroyuki Hayasaki

Masamichi Kawakami

Yoshihiro Hobo

Yasunori Tsuji

Youichirou Arimatsu

Seiji Katou

Kyoichi Yonezawa

Hideya Yamaguchi

Masaaki Hasegawa

The invention relates to a reading apparatus provided with a document table. More particularly, it relates to a reading apparatus which automatically detects the presence or absence of a document and/or the size of a document mounted on the document table. The reading apparatus related to the invention is provided with a light source which illuminates the document table and a means for collecting information about light intensity of the document table. The reading apparatus first gains information about light intensity of the document table when the light source is off and that when it is on, and then by comparing these informations, it detects the presence or absence of a document and/or the size of the document. Accordingly, the reading apparatus correctly detects the presence or absence of a document and/or the size of the document without being affected by external light even when the document cover remains open. Furthermore, the reading apparatus correctly detects the presence or absence of a document and/or the size of the document without taking the open and closed condition of the document cover into account.

Apparatus for detecting the presence and size of a document

A printing apparatus and a facsimile equipment incorporating the same according to the present invention are constituted as such that, when printing an original of, for example, A3 size by a printer of A4 size, the original read in the subscanning direction at reading is printed in the main scanning direction at printing, and at the same time, the image data in the main scanning direction and subscanning direction are enlarged or reduced respectively for printing so as to bring the length/widthwise ratio of a hard copy thus obtained equal to those of the original, so that when the facsimile including a A4 size printer receives the original of A3 size, the hard copy without distortion can be obtained with the smaller printer as compared with the original.

Printing apparatus and facsimile equipment

Growing community of inventors

Hashima, Japan

Yuji Houjiyou