摘要:
An charging apparatus includes a housing having a charging side adapted to face a photoreceptor; and a sharp-edged electrode charging member provided in the housing so that the photoreceptor is charged through the charging side by corona discharge from the sharp-edged electrode charging member. The charging apparatus further comprises an air introducing member provided a rear side opposite to the charging side and for introducing air into the housing.
摘要:
This invention relates to a toner density control method for an image recording apparatus including the steps of: obtaining, as a sensitivity of a toner density sensor, a change amount in output voltage of the sensor with respect to that in control voltage for controlling a strength of the magnetic field generated by the sensor; calculating a ratio of the sensitivity of the sensor to that of a standard toner density sensor, thus obtaining a correction value; discriminating which one of plurality of ranges bounded in accordance with operational results of a value of the output voltage of the standard toner density sensor and the correction value of the output voltage of the sensor belongs to, and changing a replenishing amount of the toner on the basis of a discrimination result, and relates to an apparatus for practicing the method.
摘要:
A copying machine for reproducing an image with toner on a recording sheet. The copying machine has a photoreceptor to hold a latent image corresponding to the image on its surface, in which the surface is charged to a predetermined electric potential before holding the latent image. The latent image is developed with toner, transferred onto the recording sheet, and fixed on the recording sheet with heat. The heater of the copying machine heats up the fixing unit to a predetermined temperature, and terminates heating the fixing unit when an operation of the machine is ended. The copying machine has a capability to detect a temperature of the fixing unit and determining an interval between the time when the operation is ended and the time when the operation is restarted, based on the determined temperature of the fixing unit.
摘要:
In an image forming apparatus which adjusts transferring condition according to an output signal from a moisture sensor, a control circuit has an off-time estimation device for estimating a power source interruption period from a surface temperature of a fixing roller and heat radiation elapsed time characteristics of the fixing roller and a time measuring device for measuring the time elapsed after the loading of a sheet feeding cassette. The control circuit further includes a moisture content converter for converting a total elapsed time after loading the sheet feeding cassette and for converting humidity into moisture content data of the transferring sheets. The control circuit controls the output from a high voltage power source of the apparatus, based on the moisture content data.
摘要:
A copying apparatus is adapted to suppress the temperature rise of a platen glass by decreasing the copy speed from a first speed to a second speed after the apparatus has copied a threshold number of sheets in succession. The above parameters of the first speed, the second speed and the threshold number are basically predetermined based on the size of the copy paper and the magnification in copying, and modified based in accordance with the source voltage of a lamp to emit scanning light to scan an original on the platen glass.
摘要:
In a device for sensing a temperature of a fixing roller, a thermistor is provided on a flat upper surface of a support member made of a foamed silicone material, with a heat conductive material provided between them. A heatproof protective sheet is wrapped around so that the thermistor is partially sunk into the support member by the tightness of the wrapping. The heat conductive material is thereby deformed to the thermistor's shape. At the same time, the top part of the thermistor is always protruded from the upper part of the support member. A holder keeps this construction in contact with the circumferential surface of the fixing roller.
摘要:
Print data for display in which an operation screen of a multifunction periphery is described in a page-description language is created and outputted to an external memory medium. Specifically, the print data for display includes a screen description section 51 where an image is described by vector information and a function description section 52 where a function of the operation screen (operation when the operation button is pressed) is described by PJL. In another multifunction periphery, a bitmap image of an operation screen 60 is created and displayed by rasterizing the screen description section 51 of the print data for display read from the external memory medium, and the function of the operation screen is reproduced from information of the function description section 52.
摘要:
Combining section 21 creates the composite image data by combining the image data of the original image and the additional image, and log management section 22 stores the condition of composite images at the time of image combining as log information 40. Printer section 18 prints the composite image based on the composite image data, and a scanner section 16 optically reads the printed composite image. Judgment section 23 judges the condition of adding the additional image in the composite image (presence or absence of overlapping, etc.,) based on stored log information 40 and on the image data obtained by reading out the composite image, and notification control section 24 notifies the user of the judgment result either by displaying or by printing out.
摘要:
Combining section 21 creates the composite image data by combining the image data of the original image and the additional image, and log management section 22 stores the condition of composite images at the time of image combining as log information 40. Printer section 18 prints the composite image based on the composite image data, and a scanner section 16 optically reads the printed composite image. Judgment section 23 judges the condition of adding the additional image in the composite image (presence or absence of overlapping, etc.,) based on stored log information 40 and on the image data obtained by reading out the composite image, and notification control section 24 notifies the user of the judgment result either by displaying or by printing out.
摘要:
Print data for display in which an operation screen of a multifunction periphery is described in a page-description language is created and outputted to an external memory medium. Specifically, the print data for display includes a screen description section 51 where an image is described by vector information and a function description section 52 where a function of the operation screen (operation when the operation button is pressed) is described by PJL. In another multifunction periphery, a bitmap image of an operation screen 60 is created and displayed by rasterizing the screen description section 51 of the print data for display read from the external memory medium, and the function of the operation screen is reproduced from information of the function description section 52.