Abstract: When the electrically driven fan (14) of a vacuum cleaner is driven, air containing dust is drawn into the cleaner main body (1) through a hose (7) connected to a hose socket (8) and is exhausted into the outside of the cleaner main body (1) through an exhaust port (1b) via first and second suction passageways (10, 13). Disposed outside the first suction passageway (10) is an ion generator (23), it being arranged that plus and minus ions generated in the ion generator (23) are fed to the air stream flowing in the first suction passageway (10). Since the plus and minus ions kill floating germs in the air stream, the exhaust can be purified.

Abstract: In an electric power steering apparatus, a worm gear is structured such that a leading end of a leading end shaft of the worm gear is always pressed and supported by a part in a peripheral direction of a diameter enlarged inner diameter portion of a collar which is urged by an elastically urging body, and is always urged toward a side coming close to a center shaft of a worm wheel.

Abstract: In an electric power steering apparatus, a worm gear is structured such that a leading end of a leading end shaft of the worm gear is always pressed and supported by a part in a peripheral direction of a diameter enlarged inner diameter portion of a collar which is urged by an elastically urging body, and is always urged toward a side coming close to a center shaft of a worm wheel.

Abstract: When the electrically driven fan (14) of a vacuum cleaner is driven, air containing dust is drawn into the cleaner main body (1) through a hose (7) connected to a hose socket (8) and is exhausted into the outside of the cleaner main body (1) through an exhaust port (1b) via first and second suction passageways (10, 13). Disposed outside the first suction passageway (10) is an ion generator (23), it being arranged that plus and minus ions generated in the ion generator (23) are fed to the air stream flowing in the first suction passageway (10). Since the plus and minus ions kill floating germs in the air stream, the exhaust can be purified.

Abstract: An image forming device in which the toner density of a two-component developing device can be stably controlled in printing a one-page image and the frequency of interruption of even printing a series of pages can be decreased as less as possible. The number of pixels of the image relevant to the development counted during the printing and the toner consumption is estimated from other image information, and the amount of toner corresponding to the consumption is supplemented. In this supplement, the count is acquired at an intermediate time of the one-page printing, the toner consumption is estimated, and the toner is supplemented during the printing after the intermediate time. Thereby, toner supplement can be performed ahead of its schedule, and a variation of the toner density can be prevented correspondingly.

Abstract: When the electrically driven fan (14) of a vacuum cleaner is driven, air containing dust is drawn into the cleaner main body (1) through a hose (7) connected to a hose socket (8) and is exhausted into the outside of the cleaner main body (1) through an exhaust port (1b) via first and second suction passageways (10, 13). Disposed outside the first suction passageway (10) is an ion generator (23), it being arranged that plus and minus ions generated in the ion generator (23) are fed to the air stream flowing in the first suction passageway (10). Since the plus and minus ions kill floating germs in the air stream, the exhaust can be purified.

Abstract: The present invention provides a developing apparatus that can effectively prevent generation of a ghost due to poor detachment of a developer after development, and generation of unevenness in density between a left part and a right part of an image region due to lack of an amount of the developer transported. The developing apparatus satisfies the relationship r+R?d?3r+R where r denotes a rotational radius of a second developer transporting screw, R denotes a rotational radius of a development roller, and d denotes a center distance between the second developer transporting screw and the development roller. The developing apparatus also satisfies the relationship M0?(mg0×v×l)/0.

Abstract: The present invention provides a developing apparatus to be provided in a quick start up electrophotographic image forming apparatus that can efficiently prevent generation of unevenness by a screw pitch in a short period of time. The developing apparatus rotates a developer transporting screw so as to transport and supply a developer to a developer bearing member, and develops a latent image formed on an image bearing member by the developer. The developer transporting screw includes a vane winding around a rotation shaft in a spiral form. A vane surface on other side of a developer transport direction of the vane includes two planes having different angles with a rotational center line of the rotation shaft.

Abstract: A printing apparatus having almost the same scale and function as printing apparatuses the usable maximum paper size of which is equivalent to A-4 size can print an image on a paper the size of which is larger than A-4 as necessary. A printing mechanism section (101) and a paper feed mechanism section (180) print an image according to printing data on one side of a paper which can be an expansion printing paper folded once or more times and developable after printing. The paper feed mechanism section (180) reverses a paper and feeds the reversed paper to the printing mechanism section (101). By using a printing mode selecting function of a printer driver (410), a predetermined printing mode is selected from printing modes in which the image is printed in different printing forms on the paper.

Abstract: The present invention provides a one-component development type developing apparatus including a rotatable electrostatic latent image holding member 1 on the surface of which an electrostatic latent image is formed, and using a toner 4 for rendering the electrostatic latent image visible, wherein when the shape factor SF-1 of a toner fine particle is expressed by: SF-1=(M2/A)×(?/4)×100 where A is the projected area of the fine particle and M is the absolute maximum length of the fine particle, then the shape factor SF-1 of the toner 4 is at least 100 and at most 140, and the developing apparatus includes: a toner holding member 3 that is formed from a silicone rubber elastic material and that is for holding the toner 4 and transporting it to the electrostatic latent image holding member 1; a toner layer regulating member 9 for forming the toner on the toner holding member 3 into a thin layer; and a toner supply member 5 that is formed from a silicone rubber foam and that rotates, in a position opposed to th

Abstract: The developing apparatus of the present invention includes a developer holding member for supplying a developer including a toner and a carrier onto the surface of an electrostatic latent image holding member; first developer transporter for transporting the developer in a first direction, the first developer transporter being disposed in a first developer transport path; second developer transporter for transporting the developer in a second direction that is opposite to the first direction and supplying the developer to the developer holding member, the second developer transporter being disposed in a second developer transport path; a magnet roller for drawing up the developer that has been transported through the second developer transport path into the first developer transport path; and an inclined surface that is disposed in contact with or close to the surface of the magnet roller and that is inclined such that the height thereof decreases along the first direction, wherein the developer that is held

Abstract: An image output apparatus capable of controlling the image density for a specific level in a short time and with accuracy and no control failure. When the values of manipulated variables that are control parameters of the output image quality or a controlled variable are calculated and the parameter values become out of the practically settable range in the course of obtaining new manipulated variables adjusted for controlling the output image quality for a specific level, the image density control unit of the image output apparatus corrects the data in the image density database that are used for comparison in obtaining the parameter values according to the current environmental state and repeats the calculation, whereby no control failure occurs and optimum parameter values are obtained; consequently, the output image quality can be controlled for a target level in a stable manner.

Abstract: The present invention provides a developing apparatus that can effectively prevent generation of a ghost due to poor detachment of a developer after development, and generation of unevenness in density between a left part and a right part of an image region due to lack of an amount of the developer transported. The developing apparatus satisfies the relationship r+R?d?3r+R where r denotes a rotational radius of a second developer transporting screw, R denotes a rotational radius of a development roller, and d denotes a center distance between the second developer transporting screw and the development roller. The developing apparatus also satisfies the relationship M0?(mg0×v×l)/0.

Abstract: The present invention provides a developing apparatus to be provided in a quick start up electrophotographic image forming apparatus that can efficiently prevent generation of unevenness by a screw pitch in a short period of time. The developing apparatus rotates a developer transporting screw so as to transport and supply a developer to a developer bearing member, and develops a latent image formed on an image bearing member by the developer. The developer transporting screw includes a vane winding around a rotation shaft in a spiral form. A vane surface on other side of a developer transport direction of the vane includes two planes having different angles with a rotational center line of the rotation shaft.

Abstract: The present invention provides a one-component development type developing apparatus including a rotatable electrostatic latent image holding member 1 on the surface of which an electrostatic latent image is formed, and using a toner 4 for rendering the electrostatic latent image visible, wherein when the shape factor SF-1 of a toner fine particle is expressed by: SF-1=(M2/A)×(?/4)×100 where A is the projected area of the fine particle and M is the absolute maximum length of the fine particle, then the shape factor SF-1 of the toner 4 is at least 100 and at most 140, and the developing apparatus includes: a toner holding member 3 that is formed from a silicone rubber elastic material and that is for holding the toner 4 and transporting it to the electrostatic latent image holding member 1; a toner layer regulating member 9 for forming the toner on the toner holding member 3 into a thin layer; and a toner supply member 5 that is formed from a silicone rubber foam and that rotates, in a position opposed to t

Abstract: An image output apparatus for controlling an output image stably. The image output apparatus comprises a database for storing data giving a relation between manipulated variables and a controlled variable for a reference pattern. The apparatus estimates sets of values of the manipulated variables used when outputting an image of the reference pattern, by using the data on the database to obtain values of the manipulated variables from a desired value for the reference pattern. By means of detected values for a plurality of images of the reference pattern outputted according to the estimated values of the manipulated variables, set values of the manipulated variables for the desired value is calculated.

Abstract: The developing apparatus of the present invention includes a developer holding member for supplying a developer including a toner and a carrier onto the surface of an electrostatic latent image holding member; first developer transporter for transporting the developer in a first direction, the first developer transporter being disposed in a first developer transport path; second developer transporter for transporting the developer in a second direction that is opposite to the first direction and supplying the developer to the developer holding member, the second developer transporter being disposed in a second developer transport path; a magnet roller for drawing up the developer that has been transported through the second developer transport path into the first developer transport path; and an inclined surface that is disposed in contact with or close to the surface of the magnet roller and that is inclined such that the height thereof decreases along the first direction, wherein the developer that is held

Abstract: When the electrically driven fan (14) of a vacuum cleaner is driven, air containing dust is drawn into the cleaner main body (1) through a hose (7) connected to a hose socket (8) and is exhausted into the outside of the cleaner main body (1) through an exhaust port (1b) via first and second suction passageways (10, 13). Disposed outside the first suction passageway (10) is an ion generator (23), it being arranged that plus and minus ions generated in the ion generator (23) are fed to the air stream flowing in the first suction passageway (10). Since the plus and minus ions kill floating germs in the air stream, the exhaust can be purified.

Abstract: In an electric vacuum cleaner, in a suction air passage provided between a nozzle unit having a nozzle and an electric blower for producing a suction air flow, a separator for separating dust from the suction air flow is arranged. In the separator, a dust collection chamber for collecting the separated dust is provided. The separator is fitted with an exhaust tube having an outlet, fitted with a filter, formed in the peripheral surface thereof so that the suction air flow is exhausted out of the separator through the exhaust tube to the downstream side of the suction air passage. The separator is fitted with a cleaning member having a brush for cleaning the filter. When the cleaning member is moved with the brush keeping contact with the filter, the dust that has settled on the filter is raked off. The cleaning member is moved through manual operation, with a motor, or by the suction air flow.

Abstract: An image forming apparatus and a process cartridge capable of satisfying both a high quality image and an excellent maintenance property with a simple configuration. A photosensitive member and a charging roller that is a member rotating in contact with the photosensitive member are brought into contact with each other in the image forming process. When an image forming operation starts from a standstill, the charging roller is rotated before the photosensitive member starts to be rotated. Furthermore, before the photosensitive member stars to be rotated, a reversed bias voltage that is a voltage opposite to the bias voltage at usual development time is applied between the members rotating in contact with the photosensitive member and the photosensitive member. The time for which the charging roller is rotated before the photosensitive member starts to be rotated is set to be 0.01-2.