Abstract:
An image forming apparatus includes an adjustment unit that adjusts an image transfer position of the sheet of paper along a main scanning direction that is orthogonal to a transporting direction of the sheet of paper, a fixing unit that fixes on the sheet of paper an toner image using fixing rollers and performs a fluctuation of the fixing roller to the main scanning direction, a detection unit that detects whether or not the fixing rollers of the fixing unit nip the sheet of paper, and a controller. The controller controls the fixing unit to perform the fluctuation of the fixing rollers when determining that the fixing rollers of the fixing unit do not nip the sheet of paper based on a detection result of the detection unit.
Abstract:
Damages on fixing members caused by paper passing through can be reduced. The registration rollers 53 and the registration oscillation roller 54 are provided on an upstream side of a fixing nip portion in a conveyance path for paper P and have a function of moving the paper P being conveyed toward the fixing nip portion, in a paper width direction, and the control section 10 performs paper oscillation control and fixing unit oscillation control in correlation with each other, the paper oscillation control in which the registration rollers 53 and the registration oscillation roller 54 are controlled to oscillate a position on which the paper P passes through, and the fixing unit oscillation control in which the fixing unit oscillation motor 36 is controlled to oscillate the fixing unit.
Abstract:
An image forming apparatus having a color mode and a monochromatic mode, which includes: a transmission member, which can be switched between a transmitted state where a motor transfers a drive force to a single photoreceptor drum and a non-transmitted state where the motor does not transfer the drive force to the single photoreceptor drum; and a controller which switches to the non-transmitted state while executing an image formation in the monochromatic mode, and when a command to execute a next image formation is not instructed, switches to the transmitted state after a phase adjustment of each photoreceptor drum after the image formation in the monochromatic mode, and controls the motor to execute a slight rotation operation at every prescribed period of time by synchronizing plural drums including the single photoreceptor drum with each other through the transmission member.
Abstract:
An image forming apparatus having a color mode and a monochromatic mode, which includes: a transmission member, which can be switched between a transmitted state where a motor transfers a drive force to a single photoreceptor drum and a non-transmitted state where the motor does not transfer the drive force to the single photoreceptor drum; and a controller which switches to the non-transmitted state while executing an image formation in the monochromatic mode, and when a command to execute a next image formation is not instructed, switches to the transmitted state after a phase adjustment of each photoreceptor drum after the image formation in the monochromatic mode, and controls the motor to execute a slight rotation operation at every prescribed period of time by synchronizing plural drums including the single photoreceptor drum with each other through the transmission member.
Abstract:
A signal processing apparatus comprising: an optical sensor for outputting a detection signal by detecting a surface of a recording medium on which a correction image is to be formed; and a control section configured to obtain a detection signal of the surface of the recording medium with the correction image from which a dominant frequency component has been deleted by making reverse frequency analysis of an analysis signal that has been obtained by making a frequency analysis of a detection signal outputted by the optical sensor detecting the surface of the recording medium on which the correction image it formed.
Abstract:
An image forming apparatus is disclosed having a fixing unit having a heating device, for heat fixing, a heating power supply section which is connected to the fixing unit to supply electric power supplied from a commercial power supply to the heating device, a voltage detecting section for detecting a value of voltage supplied to the heating power supply section from the commercial power supply, and a control section that stops a supply of electric power to the heating device from the heating power supply section if a first voltage value is smaller than a standard voltage value, while, compares a second voltage value detected by the voltage detecting section after the lapse of the standard time with the standard voltage value, and conducts control to stop operations for image forming if the second voltage value is smaller than the standard voltage value.
Abstract:
An image reading apparatus for reading a document image includes: a document feeding tray for placing the document thereon; a first document reading position for reading the first face of the document ejected and conveyed each from the document feeding tray; a document reverse tray for storing the document so that the document having passed through the first document reading position is reversed and conveyed; a stationary document reading position wherein the document having passed through the document reverse tray and having been reversed and conveyed is conveyed to a platen and the stationary document is read; and an image reading unit for reading the document image. The image reading unit stops at the first document reading position to read the first face of the document, and performs scanning movement at the stationary document reading position to read the second face of the document.
Abstract:
An image forming apparatus includes a photoreceptor member; a LED head that includes a plurality of light emitting diodes arrayed in a line along a rotating axial direction of said photoreceptor member and that is modulated in response to image signals, so as to expose said photoreceptor member while said photoreceptor member is rotating; a deviation detecting sensor to detect deviations on a circumferential surface of said photoreceptor member; a filter to extract low frequency components including a rotational frequency component of said photoreceptor member from deviation signals detected by said deviation detecting sensor, so as to acquire deviation information with respect to said circumferential surface of said photoreceptor member; a driving section to move said LED head back and forth against said circumferential surface of said photoreceptor member; and a position controlling section to control said driving section, based on said deviation information acquired by said filter, so as to keep a distance between said LED head and said circumferential surface of said photoreceptor member constant.
Abstract:
An image forming apparatus has a sheet feeding section for conveying a sheet for image formation, a stepping motor for driving the sheet feeding section, and a controller for controlling operation of the stepping motor. The controller includes a current value setting section. The current value setting section sets a current value that actuates the stepping motor based on sheet information obtained through at least one section selected from a thickness detecting section, size detecting section, and paper quality detecting section. The thickness detecting section detects a thickness of the sheet. The size detecting section detects a size of the sheet. The paper quality detecting section detects a paper quality of the sheet.
Abstract:
A printing control apparatus connected via a network with one or more of image forming apparatuses includes: a power source detection section which detects an image forming apparatus turned on; and a setting section which sets a mode shift time for shifting from a normal power mode to a power saving power mode a power consumption of which is less than a power consumption of the normal power mode of each of the image forming apparatuses; and a notice section which notices the set mode shift time to the image forming apparatus corresponding to the mode shift time, wherein the setting section changes the mode shift time when a plurality of image forming apparatuses which has been turned on is connected with the network, by comparing with a case when the network is connected with only one image forming apparatus turned on.