Abstract: An image forming apparatus including: an image forming portion for forming an image on a sheet; an image reading portion for reading an original, the image forming portion having a printed board having a projecting board surface projecting on an image reading portion side; a hinge portion having a pivot axis for pivotably supporting the image reading portion relative to the image forming portion; and a cable having a connector to be electrically connected with a connector receiving portion provided on the projecting board surface, wherein, within the image forming apparatus, the cable is folded back in a U-shape in a vicinity of the pivot axis from the image reading portion side to an image forming portion side, with the connector of the cable being connected to the connector receiving portion from a direction substantially perpendicular to the projecting board surface.

Abstract: An image forming apparatus is provided that detects a sheet remaining between a transfer unit and fixing unit using a loop sensor. The loop sensor is configured to detect a loop of a sheet conveyed between the transfer unit and the fixing unit. The image forming apparatus includes a control unit to control, in accordance with an output from the loop sensor, a sheet conveyance speed of the fixing unit so as to form the loop of the sheet conveyed by the transfer unit and the fixing unit. If the loop sensor detects a presence of the sheet while driving of the transfer unit and the fixing unit for conveying the sheet has stopped, the control unit determines that a remaining sheet is present, and outputs a warning signal.

Abstract: An image forming apparatus including: an image forming portion for forming an image on a sheet; an image reading portion for reading an original, the image forming portion having a printed board having a projecting board surface projecting on an image reading portion side; a hinge portion having a pivot axis for pivotably supporting the image reading portion relative to the image forming portion; and a cable having a connector to be electrically connected with a connector receiving portion provided on the projecting board surface, wherein, within the image forming apparatus, the cable is folded back in a U-shape in a vicinity of the pivot axis from the image reading portion side to an image forming portion side, with the connector of the cable being connected to the connector receiving portion from a direction substantially perpendicular to the projecting board surface.

Abstract: An image-forming apparatus includes a movable lever which functions as a recording medium detector for detecting the passage of a recording medium and a temperature detecting portion provided on the movable lever. The temperature of the recording medium is detected without providing an additional space for a sensor for detecting the temperature of the recording medium.

Abstract: An image forming apparatus is provided that detects a sheet remaining between a transfer unit and fixing unit using a loop sensor. The loop sensor is configured to detect a loop of a sheet conveyed between the transfer unit and the fixing unit. The image forming apparatus includes a control unit to control, in accordance with an output from the loop sensor, a sheet conveyance speed of the fixing unit so as to form the loop of the sheet conveyed by the transfer unit and the fixing unit. If the loop sensor detects a presence of the sheet while driving of the transfer unit and the fixing unit for conveying the sheet has stopped, the control unit determines that a remaining sheet is present, and outputs a warning signal.

Abstract: According to the present invention, a temperature sensing part of temperature sensing means is arranged to come into contact with the surface opposite to the image surface of a recording material at the time of one-sided printing without providing such an opposed member that comes into contact with the image surface of the recording material at least in a position corresponding to the position of the temperature sensing part that is in contact with the recording material.

Abstract: In continuous printing operation which repeatedly sets a state in which when a preceding printing material passes through the nip area of a thermal fixing unit, a succeeding printing material has been supplied to an image forming unit and image forming operation has been started, a first temperature indicating an ambient temperature near the thermal fixing unit is measured at an early time point in the continuous printing operation. A second temperature indicating the temperature of the printing material which has passed through the press contact nip portion at a predetermined period of time during the continuous printing operation is measured. The amount of heat to be supplied to the succeeding printing material is controlled on the basis of the measured first and second temperatures.

Abstract: The image heating apparatus for heating an image formed on a recording material includes a flexible sleeve and a regulating member disposed at a position opposed to an end surface of the sleeve for regulating the movement of the sleeve in a generatrix direction thereof, the regulating member having a first surface opposed to the end surface of the sleeve, and a second surface opposed to the inner peripheral surface of the end portion of the sleeve in the generatrix direction thereof, wherein the regulating member is a combination of a first part having the first surface and a second part having the second surface. Thereby, the damage of the end portion of the flexible sleeve can be suppressed.

Abstract: The image heating apparatus for heating an image formed on a recording material includes a flexible sleeve and a regulating member disposed at a position opposed to an end surface of the sleeve for regulating the movement of the sleeve in a generatrix direction thereof, the regulating member having a first surface opposed to the end surface of the sleeve, and a second surface opposed to the inner peripheral surface of the end portion of the sleeve in the generatrix direction thereof, wherein the regulating member is a combination of a first part having the first surface and a second part having the second surface. Thereby, the damage of the end portion of the flexible sleeve can be suppressed.

Abstract: An image-forming apparatus includes a movable lever which functions as a recording medium detector for detecting the passage of a recording medium and a temperature detecting portion provided on the movable lever. The temperature of the recording medium is detected without providing an additional space for a sensor for detecting the temperature of the recording medium.

Abstract: According to the present invention, a temperature sensing part of temperature sensing means is arranged to come into contact with the surface opposite to the image surface of a recording material at the time of one-sided printing without providing such an opposed member that comes into contact with the image surface of the recording material at least in a position corresponding to the position of the temperature sensing part that is in contact with the recording material.

Abstract: In continuous printing operation which repeatedly sets a state in which when a preceding printing material passes through the nip area of a thermal fixing unit, a succeeding printing material has been supplied to an image forming unit and image forming operation has been started, a first temperature indicating an ambient temperature near the thermal fixing unit is measured at an early time point in the continuous printing operation. A second temperature indicating the temperature of the printing material which has passed through the press contact nip portion at a predetermined period of time during the continuous printing operation is measured. The amount of heat to be supplied to the succeeding printing material is controlled on the basis of the measured first and second temperatures.