Canon Kabushiki Kaisha

Hirokazu Ikeda

Yoshiaki Takayanagi

Asao Saito

Kazuyuki Masumoto

Ryoichi Koizumi

Hideo Horigome

Junichi Arakawa

A recording apparatus has a recording operation that is performed after a disposable liquid ejection recording head is mounted. The discrimination is made as to whether the recording head mounted is proper or not relative to the main assembly to which the recording head is mounted, when the main switch is actuated or the recording head is mounted. The discrimination is made with use of a part of a structure in the recording head: a temperature sensor, a temperature keeping heater, an ejection heater or a driving semiconductor function element, for example. If it is not proper, the recording operation is prevented, and/or the improperness is displayed.

Recording apparatus to which recording head is detachably mounted

An information processing apparatus, or an image recording apparatus, utilizing a CPU and a memory and capable of improving the throughput of data processing is disclosed. When the CPU does not make access to the memory, the bus between the CPU and the memory is disconnected and the bus between the memory and a data reception buffer or a recording device is established, so that the data transfer between the memory and the data reception buffer or the recording device can be conducted in parallel to the function of the CPU.

Data processing apparatus utilizing CPU

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Yokohama, Japan

Hirokazu Ikeda