Canon Kabushiki Kaisha

Tsuyoshi Otani

Noribumi Koitabashi

Yoshiaki Takayanagi

Yasuhiro Numata

Atsushi Shimizu

Hiroyuki Saito

Masaaki Matsuura

Shinya Sonoda

Akira Okamoto

Nobutsune Kobayashi

Akinori Horiuchi

Hiroyuki Kakishima

Ken Hoshino

A method of moving a cap apart from a printhead within a short period of time without damaging a printing apparatus when the cap sticks to the printhead. A cap moving unit is driven to try to move the cap apart from the printhead. When a detection unit for detecting that the cap has moved apart from the printhead detects that the cap has not moved apart from the printhead, it is controlled to slightly reciprocate the carriage while driving the cap moving unit. When the detection unit detects that the cap has moved apart from the printhead under this control, the slight reciprocation of the carriage is forcibly stopped.

Printing apparatus and printing apparatus control method

A conveying device which can determine whether an error occurred therein. When a transmission unit is in a transmission state, a sheet feed roller is driven by a DC motor to perform first driving for conveying a sheet up to a conveying roller. The occurrence of an error with respect to the sheet feed roller is determined based on information obtained from an encoder during the first driving. When the occurrence of an error is determined, second driving is performed. A conveyance error is determined based on a count value during the first driving and a count value during the second driving, which are both obtained from the encoder.

Conveyance control device, recording apparatus including the same, and convenyance control method

In the ink jet recording apparatus, while the formation of an image on the present sheet is in progress, the remaining length-to-rear end Le between the point at which the presence of the sheet is detected by the sheet detection sensor to the rear end of the present sheet and the remaining recording time Tr from the present time point to the time point at which the formation of the image on the present sheet is completed are measured. Further, in the apparatus, the sheet for the next page is supplied from the feed sheet unit when it is found that that the formation of the image on the sheet for the next page is necessary, that the remaining length-to-rear end Le is less than the reference remaining length-to-rear end Lr, and that the remaining recording time Tr is less than the reference remaining recording time TrR.

Ink jet recording apparatus and ink jet recording method

An image printing apparatus and method capable of preventing any smearing that occurs in printing at the same landing position using nozzles of different colors with a smaller RAM capacity are provided. For this purpose, for example, to prevent any ink smearing that occurs when K (black) ink and color ink are printed at the same landing point, K data in raster data transferred in accordance with the order of drive of the printing elements of a printing head is temporarily stored. In printing color data on the same raster, it is determined whether color data to be printed at the same landing point as that of the K data in the temporary storage area is present. If such data is present, smearing preventing processing is performed. In this way, any smearing between the K (black) ink and color ink can be prevented.

Image printing apparatus and method

An ink jet recording apparatus having an ink recording head detachable therefrom, characterized in that power supply device to the ink recording head is shut off when the recording head is detached therefrom.

Ink jet recording apparatus having an exchangeable ink jet head cartridge mountable thereon and recovery method of said cartridge

An ink jet apparatus includes a mounting section for exchangeably mounting a cartridge, devices for performing a recovery operation in order to improve the ink discharge condition of a recording head, and components for confirming the exchange history of the cartridge and a recording operation, these components having a confirmation result. A controller serves to control the recovery operation which is performed by the recovery means according to the confirmation result of the confirming elements. The controller makes the recovery devices operate when it is confirmed that a new cartridge is mounted on the mounting section.

Growing community of inventors

Kawasaki, Japan

Tsuyoshi Otani