Mita Industrial Co., Ltd.

Fudo Construction Co., Ltd.

Hideki Matsumoto

Yoshihiro Kawahara

Shigeo Koyama

Hiroshi Kusumoto

Tetsuro Tomoe

Kazuhiro Kobayashi

Yoshizo Kawamori

Hirofumi Ozaki

Satoshi Uemori

Koji Katsuragi

Masaru Shono

Toshiyuki Matsumoto

Thoru Tamura

Takahiro Kawakami

A drum unit exchange time indicating device for image forming apparatus comprises, an integrated signal output means to give output of integrated signal added up according to the time of use of the drum unit, a life signal output means to give output of drum unit life signal when said integrated signal exceeds predetermined value and a paper-feed mode changing means to change the mode of paper-feeding into an extraordinary mode when said drum unit life signal is detected.

Drum unit exchange time indicating device for image forming apparatus

An ink ribbon cassette is constructed such that it is unnecessary to wind off an ink ribbon at the start of every line printing process. The cassette includes two pairs of reels, each pair including an ink ribbon-winding off reel and an ink ribbon-winding up reel. The pairs of rails are rotatably mounted one above the other on a cassette casing which is detachably mounted on a carriage of a printer. The casing is provided with a driving shaft which is rotated in normal and reverse directions in response to reciprocal movement of the carriage. The driving shaft being provided with two one-way clutches transmitting the rotation of the shaft in opposite directions. Conveying members separately convey the ink ribbons for the respective pairs of reels and are driven by respective to the one-way clutches.

Ink ribbon cassette for use in printer

A method for uniformly improving a soft ground is proposed. It includes the steps of driving a pipe into the ground, putting sand thereinto and pulling up the pipe gradually while discharging and compacting the sand. In forming the sand piles, the diameter and/or strength of the sand piles are changed according to the soil nature of the ground to be improved to improve the ground uniformly.

Method and apparatus of forming sand piles for improving a soft ground

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Matsubara, Japan

Hideki Matsumoto