Abstract: A technique in an image forming apparatus in which the front and back sides of a sheet are reversed by using a reversal conveyance path is provided for causing the sheet to wait such that the sheet is not damaged when a unit for conveying the sheet to the reversal conveyance path is pulled out for the purpose of clearing a jam or the like. A roller for conveying the sheet is controlled such that the sheet to be turned back and directed into the reversal conveyance path is caused to wait until the sheet can be conveyed into the reversal conveyance path. As a standby position of the sheet while the sheet is caused to wait, a position is set such that an upstream end portion in the second conveying direction of the sheet to be directed into the reversal conveyance path does not extend for a predetermined length or longer into another conveyance unit adjacent to the intermediate conveyance unit upstream from the intermediate conveyance unit in the second conveying direction.

Abstract: To provide, in an image forming apparatus in which a part of a sheet conveying path for reversing a sheet is formed as a unit to be extractable to the outside of the apparatus, a technique for preventing damage to the sheet involved in extracting operation for the extractable unit. In an image forming apparatus that reverses a sheet conveyed in a first conveying direction for leading the sheet to a predetermined discharge tray side by switching back the sheet in a second conveying direction for leading the sheet into a reversing and conveying path, if a sheet is simultaneously detected by both a first sensor that detects a sheet present in an intermediate conveying unit and a second sensor that detects a sheet present in another sheet conveying unit adjacent to an upstream side in the second conveying direction of the intermediate conveying unit, it is determined that the sheet is present across a boundary between the intermediate conveying unit and the other sheet conveying unit.

Abstract: The present invention has been made to provide an image forming apparatus capable of suppressing occurrence of a problem caused by misalignment of the feeding speed at the time of delivery and receipt in the intermediate feeding roller with a simple configuration without increasing cost. The image forming apparatus according to the present invention comprises a drive controller 101 that controls the drive speed of an intermediate feeding roller 38 that feeds a sheet to a regist roller 37 that performs skew correction for the sheet, and a feeding speed information acquisition section 102 that acquires information relating to the feeding speed of the sheet to be fed to the intermediate feeding roller 38. The drive controller 101 drives the intermediate feeding roller 38 at least three different speeds based on the information relating to the feeding speed acquired by the feeding speed information acquisition section 102.

Abstract: An image forming apparatus and method for reproducing an image includes a plurality of color developing units, and a developing unit detector configured to detect a type and a position of each of the plurality of color developing units. A printer control unit controls the reproduction of the image based on the type and position of each of the plurality of color developing units detected by the developing unit detector.

Abstract: In an image forming apparatus, papers are taken in one by one using an auto document feeder (ADF) provided with a media sensor to determine the type of papers and successively carried to the reading position while the type of the papers are determined and displayed on the control panel. By inputting the type of image forming media corresponding to the type being displayed from the control panel, an image is formed at a desired image quality.

Abstract: An image forming apparatus is provided. The image forming apparatus is capable of suppressing occurrence of a problem caused by misalignment of the feeding speed at the time of delivery and receipt in the intermediate feeding roller with a simple configuration without increasing costs. The image forming apparatus includes a drive controller that controls the drive speed of an intermediate feeding roller that performs skew correction for the sheet, and a feeding speed information acquisition section that acquires information relating to the feeding speed of the sheet to be fed to the intermediate feeding roller. The drive controller drives the intermediate feeding roller at least three different speeds based on the information relating to the feeding speed acquired by the feeding speed information acquisition section.

Abstract: An image forming apparatus including a drive unit that drives a drive control unit that supplies a first drive current to the drive unit so as to acceleratingly drive an intermediate feeding roller, and supplies a current that is smaller than the first drive current so as to uniformly drive the intermediate feeding roller, and a timing determination unit that determines the timing of supplying a current smaller than the first drive current to uniformly drive the intermediate feeding roller after supplying the first drive current to the drive unit to acceleratingly drive the intermediate feeding roller, wherein in case the timing determination unit determines that the timing to acceleratingly drive the intermediate feeding roller comes to an end, the drive control unit supplies the first drive current to the drive unit for a time period prolonged by a predetermined time period.

Abstract: An image forming apparatus is provided that prevents paper from being scratched by a peeling claw and reducing the curl amount of the paper to be re-fed to a lower level. The rotational speed of a fixing and discharging roller is adequately kept higher than the rotational speed of a heating roller so as not to allow image stain to be produced in a paper due to scratching by a peeling claw in a fixing unit. Simultaneously, the rotational speed of reverse feeding rollers is set slightly higher than the rotational speed of the heating roller at the time when an automatic duplex unit performs paper re-feeding. As a result, “swelling” of the paper occurring in a reverse gate is eliminated by the reverse feeding roller which is rotated at a speed higher than the heating roller, thereby greatly reducing “curl amount” remaining in the paper due to the “swelling”.

Abstract: The present invention has been made to provide an image forming apparatus and a sheet feeding method capable of feeding a sheet without any problem even in the case where the rear end of the sheet is held between separating rollers at the time when the sheet is fed for a transfer process after aligning control. An image forming apparatus comprises a drive controller 101 that controls the drive of feeding rollers disposed on the upstream side in the feeding direction relative to an intermediate feeding roller that feeds a sheet to a regist roller that performs skew correction for the sheet; and a timing determination section 102 that determines the timing at which the regist roller starts feeding the skew corrected sheet after the skew correction. When the timing determination section 102 determines that a predetermined timing for the regist roller to start feeding the skew corrected sheet has come, the drive controller 101 drives the feeding rollers by a predetermined time from the predetermined timing.

Abstract: The present invention provides an image forming apparatus, a sheet feeding method, and a sheet feeding program that can suppress the occurrence of failure in feeding sheets without preventing reduction of cost and miniaturization of the device.

Abstract: The present invention provides an image forming apparatus, a sheet feeding method, and a sheet feeding program that can prevent adverse effect brought about when the temporary stop position of a sheet deviates from a predetermined stop position. The present invention provides an image forming apparatus which includes a drive control unit 101 that controls the operation of driving feeding rollers for feeding sheets to a regist roller that performs skew correction for sheets being fed, and a retention state information take-in unit 102 that takes in information concerning the retention state of a sheet that is retained by the feeding rollers to be made to stand by temporarily, wherein the drive control unit 101 resumes the sheet feeding by the feeding rollers under predetermined timing based on information concerning the retention state of a sheet that is taken in by the retention state information take-in unit 102.

Abstract: The present invention has been made to provide an image forming apparatus, a sheet feeding method, and a sheet feeding program capable of eliminating the problem that the leading end of a sheet hits against the bottom portion of a reverse feeding path and contributing to an increase in sheet feeding efficiency without adding special parts and preventing the miniaturization of the entire apparatus. An image forming apparatus comprises a drive control section 101 that controls drive of feeding rollers that guide a sheet to a reverse feeding path and then feed the sheet in a switchback manner; and a sheet information acquisition section 102 that acquires information relating to the sheet size in the feeding direction of a sheet to be switched back.

Abstract: The present invention has been made to provide an image forming apparatus capable of suppressing occurrence of a problem which is based on a sheet feeding speed with a simple configuration without increasing cost and changing a process speed. The image forming apparatus according to the present invention comprises: a drive controller 101 that controls the drive speed of an intermediate feeding roller 38 for feeding a sheet to a regist roller 37 for performing skew correction for the sheet; and a feeding speed information acquisition section 102 that acquires information relating the feeding speed of the sheet to be fed to the intermediate feeding roller 38. The drive controller 101 controls the drive of the intermediate feeding roller 38 with a feeding speed for duplex printing and a process speed based on the information relating to the feeding speed acquired by the feeding speed information acquisition section 102.

Abstract: The present invention has been made to provide an image forming apparatus capable of suppressing occurrence of a problem caused by misalignment of the feeding speed at the time of delivery and receipt in the intermediate feeding roller with a simple configuration without increasing cost. The image forming apparatus according to the present invention comprises a drive controller 101 that controls the drive speed of an intermediate feeding roller 38 that feeds a sheet to a regist roller 37 that performs skew correction for the sheet, and a feeding speed information acquisition section 102 that acquires information relating to the feeding speed of the sheet to be fed to the intermediate feeding roller 38. The drive controller 101 drives the intermediate feeding roller 38 at at least three different speeds based on the information relating to the feeding speed acquired by the feeding speed information acquisition section 102.

Abstract: The present invention has been made to provide an image forming apparatus capable of preventing a printing paper from being scratched by a peeling claw and reducing the curl amount of the printing paper to be re-fed to a lower level without adding special equipment. In an image forming apparatus 100 of the present invention, the rotational speed of a fixing and discharging roller 35 is adequately kept higher than the rotational speed of a heating roller 33 so as not to allow image stain to be produced in a printing paper PP due to scratching by a peeling claw in a fixing unit 30 and, at the same time, the rotational speed of reverse feeding rollers 37a, 37b, 37c is set slightly higher than the rotational speed of the heating roller at the time when an automatic duplex unit 170 performs paper re-feeding.

Abstract: An image forming apparatus and method for reproducing an image includes a plurality of color developing units, and a developing unit detector configured to detect a type and a position of each of the plurality of color developing units. A printer control unit controls the reproduction of the image based on the type and position of each of the plurality of color developing units detected by the developing unit detector.

Abstract: An image forming apparatus and method for reproducing an image includes a plurality of color developing units, and a developing unit detector configured to detect a type and a position of each of the plurality of color developing units. A printer control unit controls the reproduction of the image based on the type and position of each of the plurality of color developing units detected by the developing unit detector.

Abstract: An image forming apparatus and method for reproducing an image includes a plurality of color developing units, and a developing unit detector configured to detect a type and a position of each of the plurality of color developing units. A printer control unit controls the reproduction of the image based on the type and position of each of the plurality of color developing units detected by the developing unit detector.

Abstract: An organopolysiloxane composition for molding purposes is provided which includes: (A) an organopolysiloxane with at least two alkenyl groups bonded to silicon atoms, (B) a straight chain organopolysiloxane with a hydrogen atom bonded to a silicon atom at both terminals, (C) an organohydrogenpolysiloxane with at least three hydrogen atoms bonded to silicon atoms within a single molecule and including a RHSiO unit and a R2XSiO1/2 unit (wherein R is an unsubstituted or a substituted monovalent hydrocarbon group with no alkenyl groups, and X represents either a hydrogen atom or a group represented by R as defined above) within the molecule, (D) a hydrosilylation reaction catalyst, and (E) finely powdered silica, wherein the total number of hydrogen atoms bonded to silicon atoms within the constituent (B) and the constituent (C) ranges from 1 to 5 per alkenyl group within the constituent (A), and the number of hydrogen atoms bonded to silicon atoms within the constituent (B) accounts for 20 to 70 mol % of the com

Abstract: Around a heat roller, a center thermistor (20c) as a first temperature sensor is placed within the range of ±45° from a portion where maximum heat is generated by an IH coil, and a front thermistor (20f) as a second temperature sensor is placed within the range of ±45° from a portion where minimum heat is generated by the IH coil. A main CPU (201) performs fixing control on the basis of sensing temperatures from these two thermistors (20c, 20f). This can prevent an increase in the cost and uniformize the heat distribution of a fixing roller.