Abstract: Image forming apparatus in which surface electric potentials of a plurality of surface areas are detected by charging a photoconductor with a different applied bias for each predetermined timing and exposing a plurality of surface areas of the photoconductor by scanning the photoconductor with an optical beam, while changing an exposure intensity of the optical beam for each of the surface areas of the photoconductor. Then, the applied bias necessary for obtaining a predetermined electric potential of a dark section and the exposure intensity of the optical beam necessary for obtaining a predetermined electric potential of a bright section are controlled, on the basis of the surface electric potentials that are detected respectively from the different applied biases and the different exposure intensities. Thereby, the adjustment time can be made shorter than the conventional case.

Abstract: An image forming apparatus including an adjustment unit adapted to adjust an image to be formed by an image forming unit advises the next adjustment execution timing on the basis of cumulative use information obtained by the image forming unit, and changes the advised adjustment timing on the basis of selection input.

Abstract: A sheet transport apparatus of the present invention includes sheet transport means that transports a sheet, an actual position detecting device that detects an actual position of the sheet based on the rotation of a rotating member that is driven to rotate by the sheet transported by the sheet transport means, and a controller that controls a sheet transport speed of the sheet transport means depending on a difference between the actual position of the sheet which is detected by the actual position detecting device and a predicted position of the sheet which is calculated based on the sheet transport speed of the sheet transport means.

Abstract: Image forming apparatus in which surface electric potentials of a plurality of surface areas are detected by charging a photoconductor with a different applied bias for each predetermined timing and exposing a plurality of surface areas of the photoconductor by scanning the photoconductor with an optical beam, while changing an exposure intensity of the optical beam for each of the surface areas of the photoconductor. Then, the applied bias necessary for obtaining a predetermined electric potential of a dark section and the exposure intensity of the optical beam necessary for obtaining a predetermined electric potential of a bright section are controlled, on the basis of the surface electric potentials that are detected respectively from the different applied biases and the different exposure intensities. Thereby, the adjustment time can be made shorter than the conventional case.

Abstract: In order to reduce a driving time for a scanner motor that rotates the polygon mirror, when it is within a predetermined time period after the power has turned ON or opening/closing of the door has been detected, the driving of the scanner motor is prohibited, even though a print-preparation request created through key operation, opening/closing of the document feeder, setting documents into the document feeder, or the like, is issued; when it is not within a predetermined time period after the power has turned ON or opening/closing of the door has been detected, in order to shorten the first-print time, the scanner motor is driven in response to a print-preparation request.

Abstract: An image forming apparatus includes an image forming unit adapted to form an image on a sheet, a first sensor adapted to detect skew or a folded corner of a sheet being conveyed, a second sensor adapted to detect multiple feeding ofsheets being conveyed, and a display adapted to display results of detection of the first sensor and the second sensor.

Abstract: The invention intends to provide the image forming apparatus with plural sheet discharge paths, to enable setting of appropriately selecting the discharge paths according to the copy mode/fax mode/printer mode, etc. and to enable appropriate automatic selection of the plural discharge paths according to other conditions. For this purpose, there are provided the plural discharge paths 21 to 24, which are respectively assigned to the copy mode/fax mode/printer mode, etc., and the sheet after image formation by the latent image forming drum 18 constituting the image forming means is discharged by one of the discharge paths 21 to 24 according to such setting. On the other hand, according to the function state of the apparatus, such as designation of a specified post-processing, designation of special paper or detection of a jam, a specified discharge path is selected for the sheet discharge regardless of the aforementioned setting.

Abstract: An image forming apparatus includes an image forming unit adapted to form an image on a sheet, a first sensor adapted to detect skew or a folded corner of a sheet being conveyed, a second sensor adapted to detect multiple feeding of sheets being conveyed, and a display adapted to display results of detection of the first sensor and the second sensor.

Abstract: The invention is to effectively provide the image forming apparatus with plural discharge paths and to incorporate various units for realizing multiple functions within the limited space of the casing, utilizing such plural discharge paths.

Abstract: The invention intends to provide the image forming apparatus with plural sheet discharge paths, to enable setting of appropriately selecting the discharge paths according to the copy mode/fax mode/printer mode, etc. and to enable appropriate automatic selection of the plural discharge paths according to other conditions. For this purpose, there are provided the plural discharge paths 21 to 24, which are respectively assigned to the copy mode/fax mode/printer mode, etc., and the sheet after image formation by the latent image forming drum 18 constituting the image forming means is discharged by one of the discharge paths 21 to 24 according to such setting. On the other hand, according to the function state of the apparatus, such as designation of a specified post-treatment, designation of special paper or detection of a jam, a specified discharge path is selected for the sheet discharge regardless of the aforementioned setting.

Abstract: A time distance notifying system for an image forming apparatus sets an image forming mode composed of one or plural image forming parameters, generates attribute data to discriminate the set image forming mode, stores time data representing a time required for forming an image in the image forming mode represented by various attribute data, measures a time required for performing an operation of a predetermined unit during the set image forming mode, judges whether or not time corresponding to the generated attribute data has been stored in the memory, derives a time required for the image forming on the basis of a corresponding time data in a case where it is judged that a time data corresponding to the attribute data has been stored and for deriving a time required for the image forming on the basis of a time measured in a case where it is judged that a time data corresponding to the attribute data is not stored in a memory, and notifying a time derived.