Toshiba Tec Kabushiki Kaisha

Kabushiki Kaisha Toshiba

Kyosuke Terada

Kazumasa Yasui

Eizo Kurita

Tomokazu Sakabe

An image forming apparatus includes a scanner, a printer configured to print an image based on an image read by the scanner, a memory, and a processor. The processor is configured to control the printer to print an adjustment test pattern on a first sheet, and the scanner to scan the adjustment test pattern on the first sheet, determine a setting value for adjusting positioning of an image to be printed by the printer on a sheet of the first sheet size, such that an image center matches a sheet center in a main scanning direction and a sub-scanning direction, and store the determined setting value in the memory. The processor is configured to modify the setting value stored in the memory based on sheet information related to a second sheet to be used for printing, the second sheet having a second sheet size different from the first sheet size.

Image forming apparatus, operation method and storing sheet information for image adjustment

An image forming apparatus includes a developing unit attachment part to which developing units are to be attached, each of the developing units being associated with a first criteria for performing developer refreshing and a second criteria for performing developer refreshing, wherein the second criteria is defined so as to be met prior to the first criteria, and a controller configured to control a timing of developer refreshing executed for each of the developing units according to the first and second criteria values thereof, and a first developer tank that is located at a position higher than the developing unit and configured to contain the developer. When the first criteria for performing developer refreshing is met for at least one of the developing units, the controller causes developer refreshing to be performed for all developing units whose first or second criteria is met.

Image forming apparatus and method for controlling developer refreshing process therein

An image forming apparatus includes a developing unit attachment part to which developing units are to be attached, each of the developing units being associated with a first criteria for performing developer refreshing and a second criteria for performing developer refreshing, wherein the second criteria is defined so as to be met prior to the first criteria, and a controller configured to control a timing of developer refreshing executed for each of the developing units according to the first and second criteria values thereof. When the first criteria for performing developer refreshing is met for at least one of the developing units, the controller causes developer refreshing to be performed for all developing units whose first or second criteria is met.

According to one embodiment, an image erasing apparatus includes an erasing unit to perform erasing processing to a sheet on which a specific pattern is formed with decoloring toner, a reading unit to read an image on the sheet to which the erasing processing is performed by the erasing unit, a detecting unit to detect erasing residue on the sheet, based on the image read by the reading unit, and a specific pattern forming unit to form a specific pattern again on the sheet, when the erasing residue is detected by the detecting unit.

Image erasing apparatus, image forming apparatus and image erasing method

An image forming apparatus includes an image forming part to form an image with one of a color unerasable developer and a color erasable developer, and a control part to automatically select the color erasable developer when test printing is selected.

Image forming apparatus with control for test printing, and related image forming method and a computer-readable medium having computer-executable instructions

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Mishima Shizuoka, Japan

Kyosuke Terada