Canon Kabushiki Kaisha

Dai Nippon Printing Co., Ltd.

Kenichi Hirota

Mitsuru Maeda

Tomohisa Itagaki

Taichi Takemura

Daisuke Fukui

Munenori Ieshige

Kenji Suzuki

Atsushi Yoshida

Hiroshige Inoue

Naoto Tokuma

So Matsumoto

Hiroshi Kokubo

Naohiro Obonai

Hirotoshi Tajima

Keita Shigihara

Masahiro Yuki

Takenori Omata

Tsuaki Odaka

Sakie Iwaoka

Shigeta Mori

Shino Suzuki

An image forming apparatus includes an image forming portion, an oblique movement correcting portion including a first registration roller pair and a first moving portion, a reversing portion, and a re-feeding portion. The reversing portion includes a reversing roller pair and a second moving portion. The re-feeding portion includes a second registration roller pair. When an image is formed on a second surface of a sheet opposite from a first surface of the sheet, a side end position of the sheet is corrected by the second moving portion and oblique movement of the sheet is corrected, and then the side end position of the sheet is corrected again by the first moving means and the sheet is fed to the image forming portion.

Image forming apparatus

An image forming apparatus includes an image forming unit configured to form an image on a sheet, a discharge conveyance path configured to discharge the sheet on which the image is formed by the image forming unit to outside, a reverse conveyance path configured to reverse a conveyance direction of the conveyed sheet and convey the sheet, a first conveyance path configured to guide the sheet conveyed from the image forming unit to the reverse conveyance path, a second conveyance path configured to guide the sheet reversed in the reverse conveyance path from the reverse conveyance path to the discharge conveyance path, and a reading unit configured to read the image of the sheet in the second conveyance path.

Image forming apparatus including a conveyance path to guide a sheet to be reversely conveyed to a discharge conveyance path

An image forming apparatus includes an image forming unit, a conveyance guide having an opening portion, a measurement unit including a light entrance portion, and a moving member including a reference portion. The measuring unit is configured to measure an image on a sheet through the opening portion in a first state where the measurement unit is positioned in a first position and the moving member is positioned in a third position. The measurement unit is configured to measure the reference portion in a second state where the measurement unit is positioned in a second position and the moving member is positioned in a fourth position.

Image forming apparatus and measurement apparatus

A measurement apparatus includes a sheet stacking portion provided above a first conveyance path and on which a second sheet discharged out of a second conveyance path is stacked. The sheet stacking portion includes an extension tray configured to support the sheet discharged out of the second conveyance path and to be movable between a first position and a second position, the first position being a position where the extension tray is located inside a width of the measurement apparatus in the horizontal direction, and the second position being a position where the extension tray is located above an upstream apparatus and is overlapped with the upstream apparatus when viewed in a gravity direction.

Measurement apparatus, image forming apparatus and image forming system

The present invention makes it possible to reduce the number of constituent components, and to provide a bobbin body having a smooth surface. A bobbin for a thermal transfer sheet or an image-receiving sheet includes a cylindrical bobbin body, wherein a gearincluding a plurality of teethis formed on one side end of the bobbin body. Each toothof the gearhas a parallelogram shape as a whole, when viewed from a lateral side.

Bobbin for thermal transfer sheet or image-receiving sheet, assembly of bobbin and sheet, and thermal transfer printer

An image forming apparatus forms a measurement image on a sheet, moves a carriage to read the measurement image, reads from a storage unit an adjustment condition, generates a correction condition based on the adjustment condition and a result of reading the measurement image, moves the carriage to read an original, generates image data of the original, corrects a position at which an image is formed on a sheet based on the correction condition and forms an image of the original on a sheet based on the corrected image data.

Image forming apparatus that corrects position correction of image formed on sheet

Temperature of a printing mediumis sufficiently decreased by stopping the printing mediumin a discharge path, conveying the printing medium at a low speed, switching a conveyance path, or the like. If the temperature of the printing mediumcan be sufficiently decreased, the thermochromism phenomenon is suppressed. As a result, it is possible to provide an image forming apparatus capable of achieving highly accurate color matching and color stability.

An image forming apparatus including: a toner image forming unit forming a toner image on an intermediate transfer member; a transfer member transferring the toner image on the intermediate transfer member to a recording material in a transfer portion; a driving source applying driving force to the transfer member independently of an intermediate transfer member driving source; an execution unit correcting image misalignment on the basis of a detection result of a test toner image on the intermediate transfer member when no toner image exists in the transfer portion; a container storing the recording material; and an input unit associating the container with a group related to basic weight and surface properties of the recording material. The apparatus includes a driving unit driving the driving source at a speed corresponding to the group if the recording material stored in the container associated with the group is used for image formation.

An image forming apparatus includes an image forming unit configured to form a measurement image on a sheet, a measurement unit configured to irradiate the measurement image with light and measure light reflected from the measurement image, a white reference plate arranged to be movable to a first position opposed to the measurement unit and a second position separated farther from the measurement unit than the first position, a shielding unit arranged to be movable to a third position that blocks the light with which the measurement unit irradiates the white reference plate and a fourth position that does not block the light, and a control unit configured to control positions of the reference plate and the shielding unit. When the measurement unit measures the white reference plate, the control unit moves the shielding unit to the fourth position and the white reference plate to the first position.

Image forming apparatus having measurement unit that irradiates a measurement image and measures light reflected therefrom, and having shielding unit that can be moved to block such irradiation and moved to not block such irradiation

An image forming apparatus, includes an image forming unit configured to form a reference pattern and a test pattern on a sheet, a measurement unit configured to detect the reference pattern formed on the sheet and to measure the test pattern formed on the sheet, and a control unit configured to control a measurement timing of the test pattern by the measurement unit according to a detection interval between two reference patterns detected by the measurement unit.

Image forming apparatus that forms a test pattern and carries out correction

A sheet conveying apparatus and an image forming apparatus capable of high-precision sheet position correction includes a data storage portion that stores, at the time of moving a pair of registration rollers in the width direction, the deficiency quantity of a motion quantity in the width direction and an inclination quantity incurred in the pair of registration rollers with respect to the sheet conveying direction. At the time of correcting a skew feeding of a sheet by a pair of skew feeding correction rollers, a controller adjusts a skew feeding quantity detected by an activation sensor by the inclination quantity stored in the data storage portion, and at the time of moving the pair of registration rollers in the width direction, the controller adjusts the motion quantity by the deficiency quantity of the motion quantity stored in the data storage portion.

A thermal transfer printer includes a printing unit for thermal transfer printing with a print head via a ribbon having a dye layer; a first bending member having at least one curved surface that is aligned perpendicular to a conveyance direction of the ribbon and protrudes toward a surface of the ribbon for bending the ribbon after thermal transfer, a second bending member disposed at a distance from the first bending member having at least one acute apex that is aligned perpendicular to the conveyance direction of the ribbon and protrudes toward the surface of the ribbon, the apex causing a bend line to be formed in the used ribbon conveyed from the first bending member; a folder for folding the ribbon conveyed from the second bending member along the bend line; and a heater for fusing opposing dye layers of the folded ribbon together.

Thermal transfer printer

A registration portion which conveys a sheet toward an image forming portion forming an image on the sheet includes a controlling portion which regulates a sheet skew feeding correction amount by the skew feeding correcting portion based on the sheet right angle degree detected by the end detection sensor. The controlling portion automatically calculates, from the sheet right angle degree detected by the end detection sensor, a skew feeding regulation amount used for making any one of the two sides, forming the corner of the sheet, parallel to the image and corrects the skew feeding of the sheet by the skew feeding correcting portion with the use of the skew feeding regulation amount so that any one of the two sides forming the corner of the sheet is parallel to the image.

Sheet conveying apparatus and image forming apparatus

A thermal transfer printer according to the invention includes at least one printing unit for thermal transfer printing with a print head via a ribbon having a dye layer; a first bending member for bending the ribbon after thermal transfer, the first bending member having at least one curved surface that is aligned perpendicular to a conveyance direction of the ribbon and protrudes toward one or the other surface of the ribbon; a second bending member disposed at a distance from the first bending member, the second bending member having at least one acute apex that is aligned perpendicular to the conveyance direction of the ribbon and protrudes toward the one or the other surface of the ribbon, the apex causing a bend line to be formed in the used ribbon conveyed from the first bending member; a folder for folding the ribbon conveyed from the second bending member along the bend line; and a heater for fusing opposing dye layers of the folded ribbon together.

Growing community of inventors

Tokyo, Japan

Kenichi Hirota