Canon Kabushiki Kaisha

Shigeru Tsuyukubo

Koji Terasawa

Hideki Yamaguchi

Akira Miyakawa

Shinya Matsui

Mikio Shiga

Katsuyuki Yokoi

Hiroshi Kyogoku

Tetsuo Kimura

Yoshiaki Kaburagi

Yoji Ara

Takatoshi Ohta

Shigemitsu Tasaki

Akira Nagatomo

Shoichiro Shoda

Takanori Mukai

A video data processing system includes a CPU, a video memory, video data shift registers, a ternary counter, an octal counter, a blanking counter, and a flip-flop. Video data is shifted in the shift registers in response to an output from the ternary counter. The outputs from the ternary counter are counted by the octal counter, and an output from the octal counter is counted by the blanking counter so as to count down a blanking parameter. A borrow output from the blanking sets the flip-flop to hold video data which is then stored in the video memory. This operation is repeated up to the last H along the main scanning direction. The initial value of the blanking parameter is incremented by one by one to repeat main scanning inputs along a subscanning direction.

Video data processing system

A method of cleaning a discharge port surface of an ink jet recording apparatus includes wiping the surface using a blade having a certain contact area with the surface and rubbing the surface using a rubbing member having a larger contact area with the surface than the blade. The wiping and rubbing operations are performed independently of each other so that their different purposes can be better accomplished. For example, since rubbing the surface need not be done as often as wiping, they can both be performed at optimum intervals. The rubbing member can be removably mounted to a replacement ink cartridge so that the rubbing member can be conveniently replaced at the same time as the cartridge.

Ink jet recording apparatus having a discharge orifice surface and a

A recovery device for an ink jet recording apparatus having a cup for an ink discharge port of a recording head and a suction device communicating with the cap for sucking ink from the ink discharge port includes a communicating tube, a communicating valve, and a ventilating valve. The communication tube communicates with the cap and a subtank which supplies ink to the recording head. A communicating valve connects and disconnects communication of the cap with the subtank and is provided in an intermediate portion of the tube. A ventilating valve communicates the interior of the tube with the atmosphere and is provided separately from the communicating valve.

Ink jet recovery device including a communicating valve and a

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Kawasaki, Japan

Shigeru Tsuyukubo