摘要:
An image forming apparatus is equipped with a registering device to make a copy paper temporally waiting before the copy paper is conveyed to an image forming section so that the image formation on the copy sheet is in synchronization with the working of the image forming section. When the copy paper is kept waiting, an electric resistance of the recording member is measured. An image forming condition is determined in accordance with the measurement result.
摘要:
An image forming apparatus (1) includes an image bearer (112; 131) to bear a visible image, a transfer device (13) to transfer the visible image from the image bearer (112; 131) onto a recording medium, a separator (200) to separate the recording medium from the image bearer (112; 131), a separation bias application device (210) to apply a separation bias to the separator (200), and a controller (30). When either a black sheet or a metallic sheet is fed as the recording medium in the image forming apparatus (1), the controller (30) sets the separation bias smaller than a predetermined separation bias value for a reference sheet type other than the black sheet and the metallic sheet.
摘要:
An image forming apparatus includes a moving unit (40) which includes a conveyer belt (42) to move a recording medium, an attraction unit (10) which is disposed at a front head in a moving direction of the recording medium and attracts the recording medium to the conveyer belt (42), a plurality of transferring units (20a, 20b, 20c, 20d) including a photosensitive material and a transfer roller (24a/24b/24c/24d) to perform a transferring process of the recording medium according to a plurality of colors, a power supply (30) to supply power to form an electric field in the transferring unit (20a/20b/20c/20d) and the attraction unit (10) to perform transfer and attraction of the recording medium, and a controller (50) to control the power supply (30) to supply the power to the plurality of transferring units (20a, 20b, 20c, 20d) corresponding to resistance values of second transferring units (20b, 20c, 20d) among the plurality of transferring units (20a, 20b, 20c, 20d), the second transferring units (20b, 20c, 20d) disposed apart from a first transferring unit (20a) that is located closest to the attraction unit (10) with respect to the moving direction of the recording medium.
摘要:
An image forming apparatus includes a moving unit (40) which includes a conveyer belt (42) to move a recording medium, an attraction unit (10) which is disposed at a front head in a moving direction of the recording medium and attracts the recording medium to the conveyer belt (42), a plurality of transferring units (20a, 20b, 20c, 20d) including a photosensitive material and a transfer roller (24a/24b/24c/24d) to perform a transferring process of the recording medium according to a plurality of colors, a power supply (30) to supply power to form an electric field in the transferring unit (20a/20b/20c/20d) and the attraction unit (10) to perform transfer and attraction of the recording medium, and a controller (50) to control the power supply (30) to supply the power to the plurality of transferring units (20a, 20b, 20c, 20d) corresponding to resistance values of second transferring units (20b, 20c, 20d) among the plurality of transferring units (20a, 20b, 20c, 20d), the second transferring units (20b, 20c, 20d) disposed apart from a first transferring unit (20a) that is located closest to the attraction unit (10) with respect to the moving direction of the recording medium.
摘要:
An image forming apparatus is provided with an electrically conductive roller-shaped electrode (35) and a counter electrode (36) along a transport path for a recording material (5). A current flowing through each of divided electrodes in the counter electrode is detected by an impedance detector (37), and results of detection are inputted to a control unit, thereby performing a detection determining whether or not the recording material exists and the width and the resistance of the recording material. According to the above arrangement, without increasing the number of components, above mentioned detections can be accurately performed with one detection with respect to the recording material. Based on the result of detections, an accurate control for the recording material can be performed, thereby achieving a stable image quality.
摘要:
An image forming apparatus is equipped with a registering device to make a copy paper temporally waiting before the copy paper is conveyed to an image forming section so that the image formation on the copy sheet is in synchronization with the working of the image forming section. When the copy paper is kept waiting, an electric resistance of the recording member is measured. An image forming condition is determined in accordance with the measurement result.
摘要:
An image forming apparatus is provided with an electrically conductive roller-shaped electrode (35) and a counter electrode (36) along a transport path for a recording material (5). A current flowing through each of divided electrodes in the counter electrode is detected by an impedance detector (37), and results of detection are inputted to a control unit, thereby performing a detection determining whether or not the recording material exists and the width and the resistance of the recording material. According to the above arrangement, without increasing the number of components, above mentioned detections can be accurately performed with one detection with respect to the recording material. Based on the result of detections, an accurate control for the recording material can be performed, thereby achieving a stable image quality.
摘要:
An apparatus and a method for optimizing the quality of electrophotographic imaging based on the properties of the printing media are presented. In order to determine the properties of the printing media without interrupting the normal image transfer process, the present invention uses rollers (36) as a part of a sensor. When the printing media lies between the rollers (36), the rollers and the printing media form an RC circuit. A pulse is applied to the RC circuit, the step response of which is periodically sampled. The samples may be obtained logarithmically in time. Based on the resultant response, a controller (30) calculates the resistance (Rm) and the capacitance (Cm) of the printing media and adjusts imaging parameters, such as the transfer bias voltage, for optimal image transfer. The entire optimization process occurs between the time of the printing media passes through the rollers (36) and the time the imaging transfer is executed.