摘要:
A push button includes a button main body portion which is provided between a packaging substrate placed under it and a casing portion located above it, a light source placed on the packaging substrate, and a light-guide portion which guides light from the light source to an outer periphery of the button main body portion by reflection.
摘要:
An image forming apparatus for performing thermal fixing of toner images, including a fixing section, a heating section, a power supply section and a control section, wherein when the control section controls the power supplying section to start supply of the electric power to the heating section, the control section controls the power supplying section to stop the electric power to the heating section, after a lapse of a predetermined time interval, based on the thermal response characteristic of the temperature detecting section, even when the temperature of the heating section has not yet reached the target fixing temperature.
摘要:
There is described an image forming apparatus, in which the influence of the overall controlling section startup time is reduced, thereby cutting down the time from turning on of power to enabling of image formation. The image forming apparatus includes: a main power switch to turn ON/OFF an AC power source to be supplied into the image forming apparatus; a DC power current generating section to convert AC power current, fed from the AC power source, to DC power current; an overall-controlling section to control overall operations of the image forming apparatus; an engine-controlling section to conduct a predetermined controlling operation among from controlling operations to be conducted in the image forming apparatus; a first power-controlling section, included in the overall-controlling section and/or controlled by the overall-controlling section; and a second power-controlling section, having a starting time shorter than that of the first power-controlling section.
摘要:
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.
摘要:
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.
摘要:
In a fixing device of an image forming apparatus including a heating roller and a temperature detecting device spaced apart from the roller, having a first sensor for detecting the surface temperature of the roller, and a second sensor for detecting the ambient temperature, the first sensor being placed at a first position in a casing having an opening through which the heat radiation of the roller is directly incident and the second sensor being enclosed by the casing and placed at a second position to which the heat radiation of the roller is not directly incident, the temperature is calculated on the basis of the outputs of the two sensors, and the opening is disposed so as not to enter a region between the vertical plane containing the central axis of the roller and a tangential plane to the circumferential surface of the roller parallel to the vertical plane.
摘要:
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.
摘要:
There is described an operation panel, which is detachably or movably mounted onto an image-forming apparatus, and which includes a data-inputting section to input operational data necessary for operating the image-forming apparatus and/or a displaying section to display status information of the image-forming apparatus. The operation panel comprises: a circuit board, on which electronic parts are mounted; a supporting member to support the circuit board, the data-inputting section and/or the displaying section, so as to integrate them into a single unit serving as the operation panel; a signal line, through which electronic signals are communicated between the operation panel and the image-forming section; and a conductive member for directly grounding at least one of the data-inputting section, the displaying section and the circuit board to a conductive main-frame of the image-forming apparatus. The signal line and the conductive member are disposed at separate positions being different relative to each other.
摘要:
This invention is directed to an image printing apparatus having a fixing control section which controls a fixing unit for fixing a toner image on a paper sheet by applying pressure and heat. The image printing apparatus of this invention includes, in the fixing control section, an interface which can receive data from an external data input device so as to shorten the warmup time of the fixing unit and perform direct instructing operation from the data input device to the fixing-unit.
摘要:
An image forming apparatus includes a toner carrier, a toner image forming unit, and a toner concentration sensor. The toner carrier includes a transparent film. The toner image forming unit forms a toner image onto the toner carrier. The toner concentration sensor senses the concentration of toner on the toner carrier. The toner concentration sensor includes first and second light emitting elements and a light receiving element. The light emitting elements each radiate light directly or indirectly to the toner carrier. The light receiving element receives reflecting light originating from the light emitting elements. The first light emitting element radiates light having a wavelength of a predetermined reflectance resulting from direct radiation to the toner carrier. The second light emitting element radiates light having a wavelength that causes a lower reflectance resulting from direct radiation to the toner carrier than a reflectance resulting from radiation to the toner.