Kyocera Document Solutions Patente

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A first supply mode is a mode for supplying power so that printing can be performed by a printing unit (6), and more power is supplied in the first supply mode than in the second supply mode or the third supply mode. More power is supplied in the second supply mode than in the third supply mode. In the specified period, the power supply circuit (8) switches from the power supply in the first supply mode to the power supply in the second supply mode when a first transition condition is satisfied. The power supply circuit (8) maintains the second supply mode without performing switching from the power supply in the second supply mode to the power supply in the third supply mode.

An image forming apparatus (100) includes an image forming section (14), a receiving section, and a controller (21). The image forming section (14) forms a plurality of images (G1 to G26) on a plurality of sheets (P). The receiving section receives a print job including a layout format indicating a layout of the images on the sheets (P). The controller (21) controls the image forming section (14) based on the print job. Each of the images indicates an image expressed by image data of a single page. The print job includes an instruction to form the images on the sheets according to a plurality of mutually different layout formats.

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A sheet loading device (10) includes a discharge roller pair (73), a loading tray (11), a paddle member (15), a sheet holding member (14), a tray lifting-lowering drive portion (113), a top surface detection sensor (S3), and a control portion (100). The control portion (100) is capable of performing a lifting-lowering operation to arrange the loading tray (11) at a reference position by lowering the loading tray (11) with the sheet holding member (14) arranged at the holding position to turn the top surface detection sensor (S3) into an off state, then lifting the loading tray (11) to turn the top surface detection sensor (S3) into an on state, and then lowering the loading tray (11) again to turn the top surface detection sensor (S3) into the off state and stopping the loading tray (11). With the loading tray (11) at the reference position, a predetermined clearance is provided between a top surface of a sheet loaded on the loading tray (11) and a rotational orbit of the paddle member (15).

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An image forming system includes an image forming apparatus (4), a management terminal device (3), and a mobile terminal device (1). The mobile terminal device (1) downloads and installs an application program, presents identification information to the management terminal device (3), and accepts a temporal ID. The management terminal device (3), upon accepting the identification information from the mobile terminal device (1), generates the temporal ID, presents the temporal ID to the mobile terminal device (1), and transmits the temporal ID to a user authentication device (5) to register the temporal ID as a user ID of the guest user. When payment of a usage fee for the image forming apparatus (4) by the guest user is completed, the management terminal device (3) deletes registration of the temporal ID. The image forming apparatus (4) performs user authentication when the guest user logs in to the image forming apparatus (4), and issues an invoice when the guest user logs out of the image forming apparatus (4).

A base toner amount determining unit is configured to determine a base toner amount without taking edge effect into account, the base toner amount corresponding to a pixel value of image data for which gradation correction has not been performed. A laser profile applying unit is configured to perform for the base toner amount a first spatial filter process corresponding to a laser profile of an exposure device. An edge emphasis amount determining unit is configured to perform a second spatial filter process for the base toner amount before the first spatial filter process or after the first spatial filter process and thereby determine an edge emphasis amount correspond to the edge effect. A toner counter is configured to count as a toner consumption amount a sum of the base toner amount after the first spatial filter process and the edge emphasis amount.

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An ink jet recording apparatus (1) is provided with a conveying unit (27), a drive roller controller (501) and a discharge timing controller (502) . The drive roller controller (501) controls a rotation speed of a drive roller (271) based on pulse signals output by an encoder (277) and corresponding to an angular velocity of a driven roller (275) and an actual outer diameter of the driven roller (275) . The discharge timing controller (502) controls an ink discharge timing based on signals obtained by attenuating multiple frequency components of a target frequency corresponding to a pulse number of the pulse signals output from the encoder (277) during one turn of the driven roller (275) in the pulse signals and an actual outer diameter of the driven roller (275) .

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A fixing device (13) includes a fixing member (21), a pressing member (23), a charger (24) and an air discharging device (27). The fixing member (21) is rotatably provided and heated by a heat source (23). The pressing member is rotatably provided and brought into pressure contact with the fixing member (21) to form a fixing nip (N) through which a sheet having a toner image is passed. The charger (24) is disposed to oppose to the fixing member (21) and applies an electric charge of the same polarity as a toner constituting the toner image to a surface of the fixing member (21). The air discharging device (27) discharges an air flow passed between the fixing member (21) and the charger (24) via a filter (27c).