Toshiba Tec Kabushiki Kaisha

Adeka Argus Chemical Co., Ltd.

Kabushiki Kaisha Toshiba

Asahi Denka Kogyo Kabushiki Kaisha

Norio Kurosawa

Toshihiro Shibata

Masaki Kimura

Kunio Ogasawara

Seiichi Takano

An image forming device includes an image forming unit, a fuser, a memory, and a control circuit. The image forming unit forms an image on a recording medium with a decolorable toner based on image data. The decolorable toner decolorizes at a first temperature and does not decolorize at a second temperature that is lower than the first temperature. The fuser has a plurality of regions extending in a direction orthogonal to a direction of conveyance of the recording medium. The fuser generates heat in each of the plurality of regions to fuse the image onto the recording medium. The memory stores a correspondence between the plurality of regions and positions of a plurality of areas positioned along a main scanning direction in the image data. The control circuit changes the correspondence based on a degree of color development or decolorization of the image.

Image forming apparatus with misalignment correction capability

According to one embodiment, an image reading apparatus includes an exposure unit, a light sensor, and a controller. The exposure unit selectively emits light to positions along a first scan direction to write pixels in accordance with a main scan line of image data. The light sensor is at a position to receive light from the exposure unit and is configured to output a synchronization signal according to the detection of the light emitted for each main scan line of image data. The controller adjusts a starting pixel position along the first scan direction for a main scan line of image data based on a change in an output interval of the synchronization signal resulting from a change in an intensity of light emitted by the exposure unit.

Image forming apparatus and position control method

According to one embodiment, an image forming apparatus includes an image forming unit, a sensor, and a control unit. The image forming unit forms a pattern constituted by a plurality of straight lines intersecting each other on a sheet or a transfer belt. The sensor detects the pattern formed on the sheet or the transfer belt. The control unit adjusts a writing position in a main scanning direction on the basis of the pattern detected by the sensor.

Image forming apparatus and image position adjustment method

In accordance with an embodiment, an image reading apparatus comprises a conveyance system, a reading section, a movement sensor and a processor. The conveyance system conveys a document in a conveyance route including a reading position. The reading section reads an image on a surface of the document passing through the reading position. The movement sensor detects a conveyance speed of the document conveyed by the conveyance system. In a case in which the conveyance speed of the document detected by the movement sensor differs from a reference speed, if the conveyance speed of the document is within an adjustable range, the processor performs control to adjust a reading processing in response to the conveyance speed of the document.

Image reading apparatus, image forming apparatus and image reading method

A fixing device includes a fixing member, a temperature measurement sensor, a movement mechanism, a movement time calculation section, a movement position calculation section, and a temperature control section. The movement mechanism moves the temperature measurement sensor to scan non-heated regions and a heated region along a width direction of the fixing member. The movement time calculation section obtains an arrival time on the basis of a temperature change measured by the temperature measurement sensor due to movement of the temperature measurement sensor. The movement position calculation section calculates the movement position on the basis of a ratio of a second movement time to a first movement time. The temperature control section performs temperature control on the fixing member on the basis of the movement position calculated by the movement position calculation section, and the temperature measured by the temperature measurement sensor.

Fixing device, image forming system, and fixing temperature control method

First patterns for setting a first adjustment value and second patterns for setting a second adjustment value are formed on a transfer belt running at a first process speed. By this, an image shift adjustment value in a sub-scanning direction is made common to the first process speed and a second process speed. Image shift adjustment values in a main scanning direction are set for the first process speed and the second process speed, respectively.

Image shift adjusting apparatus of image forming apparatus

An image copying apparatus includes a control panel to a user interface; a scanner; a memory that stores an image; an image rotation processing unit that rotates the image depending on the direction in which the image is to be printed; a printer; a printer controller; and a system controller. The printer includes a light-emitting element, an image printing start position adjusting element that adjusts a start position of a printing position of the image to be printed, an image printing area adjusting element that sets a printing area of the image to be printed, a polygon mirror, and a polygon motor. According to the image copying apparatus, even when the size of a read image has been adjusted at the time of printing, the printing results of the same manuscript can be made the same regardless of differences in the printing direction.

Image copying apparatus and image copying method

A CPU first detects a position of a stationary laser beam using a beam position detection sensor, and then determines a target position of a movable laser beam relative to the stationary laser beam. The CPU effects a control to approach the movable laser beam to the target position in predetermined steps. When the CPU moves the movable laser beam, it checks whether the movable laser beam has moved to the target position. If the movable laser beam has not moved to the target position, the CPU performs a control once again to perform the first detection of the position of the stationary laser beam.

Beam position adjusting method for optical scanning device

An optically active compound of the formula (I): ##STR1## R is a halogen atom, a cyano group, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms, --R' or --O--R' group; R' is a ##STR2## group, wherein Y is a halogen atom, a hydroxyl group, an alkoxy group having 1 to 18 carbon atoms or an acyloxy group having 1 to 18 carbon atoms; X is a direct bond or a ##STR3## group; m, n and p each are each 0 or 1, provided that at least one of m, n and p is 1; and , represents an asymetric carbon atom. The optically active compound can impart a desired helical pitch to a liquid crystal composition

Optically active compound

An image forming apparatus includes a detector for detecting a density of an image on an original document and a memory for storing a reference image forming condition for forming an image. The reference image forming condition is changable by an operator. An image forming condition corresponding to the density of the image on the original document and the reference image forming condition is generated. An image is formed in accordance with the image on the original document under the image forming condition.

Image forming apparatus

An optically active compound of the formula (I): ##STR1## R is a halogen atom, a cyano group, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms --R' or --O--R' group; R' is a ##STR2## group, wherein Y is a halogen atom, a hydroxyl group, an alkoxy group having 1 to 18 carbon atoms or an acyloxy group having 1 to 18 carbon atoms; X is a direct bond or a ##STR3## group; m, n and p each are each 0 or 1, provided that at least one of m, n and p is 1; and * represents an asymetric carbon atom. The optically active compound can impart a desired helical pitch to a liquid crystal composition.

An image forming apparatus including a copy image forming section for forming a copy image on the basis of an original image under each of a plurality of image forming conditions including a plurality of magnification ratios, a first key for inputing the change of magnification ratio from first magnification ratio to second magnification ratio, a second key for inputing one of the image forming conditions and a microprocessor for setting the second magnification ratio to the magnification ratio in accordance with first changing ratio when only the first key is operated and for setting the second magnification ratio to the magnification ratio in accordance with second changing ratio different from the first changing ratio when both the first key and the second key are operated.

Growing community of inventors

Mishima Shizuoka, Japan

Norio Kurosawa