Abstract: An image forming apparatus having an image bearing member on which an electrostatic image is formed, a first developer carrying member carrying a developer thereon, and a second developer carrying member disposed downstream of the first developer carrying member with respect to the direction of movement of the image bearing member, and designed such that one and the same electrostatic image on the image bearing member is developed with the developer carried on these developer carrying members, has a developer consumption mode in which during the other time than ordinary image formation, the developer borne on the first and second developer carrying members is shifted to the image bearing member, and during this developer consumption mode, control is effected so that the amount of developer consumed from the second developer carrying member to the image bearing member may be greater than the amount of developer consumed from the first developer carrying member to the image bearing member.

Abstract: The invention provides an image forming apparatus and an image forming method, capable of providing an image with little deterioration, even in case the image contrast has to be adjusted not for the purpose of image adjustment, such as for reducing the toner consumption amount or for preventing the leak in the charging device.

Abstract: An image forming apparatus is provided with an image bearing member, a charging member with a discharge wire and a grid, and a first current supply controlling member, which controls a current supply to the discharge wire. Also provided are a second current supply controlling member, which controls a current supply to the grid, a potential setting member, which sets a potential value on the image bearing member to be charged by the charging member, and a first current supply condition selecting member, which selects a current control condition of the first current supply controlling member or the second current supply controlling member according to the set potential. In addition, a second current supply condition selecting member selects a current control condition for the other current supply controlling member based on the determined current control condition.

Abstract: An object of the invention is to provide a capacity control device of a screw compressor capable of restraining the consumption of components such as a suction throttle valve and of extending the life of the components.

Abstract: An image forming apparatus having an image bearing member on which an electrostatic image is formed, a first developer carrying member carrying a developer thereon, and a second developer carrying member disposed downstream of the first developer carrying member with respect to the direction of movement of the image bearing member, and designed such that one and the same electrostatic image on the image bearing member is developed with the developer carried on these developer carrying members, has a developer consumption mode in which during the other time than ordinary image formation, the developer borne on the first and second developer carrying members is shifted to the image bearing member, and during this developer consumption mode, control is effected so that the amount of developer consumed from the second developer carrying member to the image bearing member may be greater than the amount of developer consumed from the first developer carrying member to the image bearing member.

Abstract: The invention provides an image forming apparatus and an image forming method, capable of providing an image with little deterioration, even in case the image contrast has to be adjusted not for the purpose of image adjustment, such as for reducing the toner consumption amount or for preventing the leak in the charging device.

Abstract: An image forming apparatus is provided with an image bearing member, charging means which has a discharge wire and a grid and which charges the image bearing member, first current supply control means which controls a current supply to the discharge wire, second current supply control means which controls a current supply to the grid, potential setting means which sets a potential value on the image bearing means to be charged by the charging means, first current supply condition selecting means which selects a current control condition of the first current supply control means or the second current supply control means according to the set potential, and second current supply condition selecting means which selects a current control condition for the other current supply control means based on the determined current control condition. Thus a potential regulation over a wide range can be achieved within a short time, without involving an increase of the current to the discharge wire.

Abstract: The invention provides an image forming apparatus and an image forming method, capable of providing an image with little deterioration, even in case the image contrast has to be adjusted not for the purpose of image adjustment, such as for reducing the toner consumption amount or for preventing the leak in the charging device.

Abstract: There is disclosed the following constitution in order to accurately perform image area separation judgment by one pixel unit of a read image at a high speed and to form an image in which character sharpness is compatible with photograph gradation without generating a false outline in the boundary of character and photograph areas.

Abstract: In a case where minute dirt is lain between light source and an original, since the light source moves in case of the fixing original reading which is an original reading system of reading an original image by fixing the original, the dirt is momently lighted by the light source and influence by the dirt for the read image is appeared in sight by only a minute dot. However, in case of the shifting original reading of reading the original image by shifting the original, since the relationship between the light source and the dirt is in a fixed state, the light source is always to light the dirt and the influence by the dirt for the read image is appeared in sight by a line or a plane. Therefore, in the present invention, edge emphasis degree of edge emphasis processing for the read image data is varied in accordance with a fact that the original reading system is the fixing original reading or the shifting original reading. Accordingly, the influence by the dirt in the shifting original reading can be reduced.

Abstract: A model helicopter rotor pitch control mechanism is provided.

Abstract: A compulsory drive unit (1) for electrical equipment provided in a vehicle is capable of easily and compulsorily driving the electrical equipment (11) in the vehicle to check the operation thereof. The compulsory drive unit (1) brings a power supply unit (30) into contact with a bus bar (21) through a conduction hole (2c) of a junction block (2) to thereby supply the electrical equipment with power from an outside battery (+B) and compulsorily drive the electrical equipment. It is therefore possible to easily check the operation of the electrical equipment, and this significantly improves the operating efficiency.

Abstract: A high quality image forming apparatus capable of outputting a quality image at a high speed is provided, with which no unevenness is generated on an image and a fog or a change in density is less likely to occur. An exposing unit is operated by an over-filled scanner method for exposure by a rotational polygon mirror that reflects lights on a surface narrower than an incident beam width, and forms an electrostatic latent image by back area exposure for exposing a non-image part.

Abstract: An image forming apparatus includes an image bearing member, an image forming unit for forming an image on the image bearing member and a detector for detecting the surface potential of the image bearing member, wherein a first image forming mode and a second image forming mode in which the image forming conditions of the image forming unit are different from each other can be selected, and further, the apparatus includes a controller for controlling the image forming conditions in the first and second image forming modes on the basis of the result detected by the detector for the first image forming mode.

Abstract: A fixing device includes a roller arranged to come into contact with a recording member bearing an unfixed image thereon so as to fix the unfixed image to the recording member, and a separation member arranged to come into contact with the roller so as to separate the recording member from the roller. A fore end of the separation member on a side for coming into contact with the roller is formed in a curved surface and intrudes into the roller. An amount of intrusion of the separation member into a surface of the roller is not less than a radius of a circle of curvature of the curved surface of the fore end of the separation member and not more than a diameter of the circle of curvature.

Abstract: A fixing device includes a roller arranged to come into contact with a recording member bearing an unfixed image thereon so as to fix the unfixed image to the recording member, and a separation member arranged to come into contact with the roller so as to separate the recording member from the roller. A fore end of the separation member on a side for coming into contact with the roller is formed in a curved surface and intrudes into the roller. An amount of intrusion of the separation member into a surface of the roller is not less than a radius of a circle of curvature of the curved surface of the fore end of the separation member and not more than a diameter of the circle of curvature.

Abstract: An electrophotographic apparatus has a detector, for detecting a surface potential on the photosensitive member, a determination unit, for employing the detection results obtained by the detector to determine an electrification amount for the electrification unit and an exposure control value for the exposure unit, for determining the electrification amount for the electrification unit, so that a dark portion potential on the photosensitive member is substantially a target dark portion potential selected from multiple target dark portion potentials, for determining a first exposure control value for the exposure unit, so that a light portion potential, which is based on the determined electrification amount and which is formed on the photosensitive member by the electrification unit and the exposure unit, is substantially a first target light portion potential, and for determining, in accordance with the first exposure control value and the selected target dark portion potential, a second exposure control val

Abstract: In a case where minute dirt is lain between light source and an original, since the light source moves in case of the fixing original reading which is an original reading system of reading an original image by fixing the original, the dirt is momently lighted by the light source and influence by the dirt for the read image is appeared in sight by only a minute dot. However, in case of the shifting original reading of reading the original image by shifting the original, since the relationship between the light source and the dirt is in a fixed state, the light source is always to light the dirt and the influence by the dirt for the read image is appeared in sight by a line or a plane. Therefore, in the present invention, edge emphasis degree of edge emphasis processing for the read image data is varied in accordance with a fact that the original reading system is the fixing original reading or the shifting original reading. Accordingly, the influence by the dirt in the shifting original reading can be reduced.

Abstract: A high quality image forming apparatus capable of outputting a quality image at a high speed is provided, with which no unevenness is generated on an image and a fog or a change in density is less likely to occur. An exposing unit is operated by an over-filled scanner method for exposure by a rotational polygon mirror that reflects lights on a surface narrower than an incident beam width, and forms an electrostatic latent image by back area exposure for exposing a non-image part.

Abstract: The invention provides an image forming apparatus and an image forming method, capable of providing an image with little deterioration, even in case the image contrast has to be adjusted not for the purpose of image adjustment, such as for reducing the toner consumption amount or for preventing the leak in the charging device.