Ricoh Company, Ltd.

Takesada Hirose

Takuro Sekiya

Makoto Obu

Tetsuro Hirota

Michio Umezawa

Takayuki Yamaguchi

Mitsuru Shingyouchi

Toshihiro Takesue

Hajime Kanda

Hideki Ohtsuki

An ink jet recording apparatus includes a recording head for ejecting droplets of ink and a driving circuit for driving the recording head. The recording head includes a base, a plate on which a plurality of openings are formed; an ink chamber to be filled with ink being formed between the base and the plate; and heater elements, provided in the ink chamber so as to face the openings of the plate, each of which heater elements supplies heat energy to ink adjacent thereto so that the air bubble is generated on each of the heater elements and so that the air bubble grows toward a corresponding one of the openings. An area of each of the openings of the plate is greater than an area each of the heater elements. When the driving circuit activates each of the heater elements, a droplet of ink is ejected due to the air bubble from the corresponding one of the openings of the plate.

Ink jet recording apparatus

An image information reading system capable of reading image information of original to be read in each main scanning line a plurality of times within the reading time available for one line thereof in the main scanning direction, storing the read image information in a plurality of memory means, and subjecting all the stored image information for one main scanning line to a predetermined logic processing in synchronization with the final reading of each scanning line read, whereby the image information of each main scanning line is determined.

Image information reading system of facsimile apparatus

Growing community of inventors

Machida, Japan

Takesada Hirose