Fujifilm Business Innovation Corp.

Nec Platforms, Ltd.

Sumitomo Heavy Industries, Ltd.

Fuji Xerox Co., Ltd.

Takuya Yamamoto

Yuki Tagawa

Fuyuki Kano

Yasuhiko Kinuta

Noboru Hirakawa

Ken Ozaki

Hiroshi Terai

Mitsuhiro Mieno

Yoshiko Shishido

Kouhei Miki

A charging device includes: a charging member that rotates in contact with a charged body and charges the charged body; and a cleaning member that comes into contact with the charging member and rotates in conjunction with the charging member, in which the cleaning member includes a foam elastic layer in which a band-shaped foam elastic member is spirally disposed with a pitch, and a diameter of a tip end portion of a cell skeleton protruding to a surface of the foam elastic layer is 50 μm or less, and a peripheral speed ratio of the cleaning member to the charging member is 0.3 or more and 0.7 or less.

Charging device, cartridge, and image forming apparatus

A charging member includes: an electrically conductive base; an elastic layer disposed on the electrically conductive base; and a surface layer disposed on the elastic layer. A PFVTF value of a surface of the surface layer is 1.5 or less. The PFVTF value is obtained by Fourier transforming a roughness curve of the surface of the surface layer that is measured in a circumferential direction to thereby obtain amplitude intensities at different periods, multiplying the amplitude intensities at different periods by VTF coefficients at respective periods that are obtained from a visual characteristic VTFL* (f=period) for lightness L* represented by Formula (V) below to thereby obtain corrected amplitude intensities at different periods, and integrating the corrected amplitude intensities in a period range of from 100 μm to 1000 μm inclusive:VTFL*()=5.05×().  Formula (V):

Charging member, charging device, process cartridge, and image forming apparatus

A roll member includes: a conductive elastic layer that contains a fatty acid metal salt; and a surface layer that is provided on the conductive elastic layer and contains a filler, in which the surface layer includes a first layer provided on the conductive elastic layer side and a second layer provided immediately above the first layer, and a content of the filler in the first layer is less than a content of the filler in the second layer.

Roll member, charging member, charging device, process cartridge, and image forming apparatus

An image forming apparatus includes an electrophotographic photoreceptor having a friction coefficient of a surface of 0.8 or less; a charging device including a charging member that is in contact with and charges the surface of the electrophotographic photoreceptor and includes a conductive base material, an elastic layer provided on the conductive base material and having a storage elastic modulus G of 5.0 MPa or less at 100 Hz, and a surface layer provided on the elastic layer; an electrostatic latent image forming device that forms an electrostatic latent image on the charged surface of the electrophotographic photoreceptor; a developing device that develops the electrostatic latent image formed on the surface of the electrophotographic photoreceptor to form a toner image by a developer containing a toner; and a transfer device that transfers the toner image to a surface of a recording medium.

Image forming apparatus and process cartridge

In order to enable reducing a possibility of being unable to connect to an AP in which a failure of a network connection occurs and also lessening a decline in a communication rate, a wireless communication method includes: detecting occurrence of a failure of a network connection in a first wireless communication device, when detecting the occurrence of the failure, determining whether or not to make a first wireless connection to the first wireless communication device, when making the determination to make the first wireless connection, making the first wireless connection to the first wireless communication device, and relaying a first communication between the first wireless communication device and a network.

Wireless communication device, method, and recording medium

A wireless communication apparatus () includes an information acquisition unit () for acquiring information about a wireless terminal when the wireless terminal is wirelessly connected to the wireless communication apparatus, a storage unit () for storing the information about an authorized terminal acquired by the information acquisition unit () in association with an individual identifier of the authorized wireless terminal, and an evaluation unit () for evaluating as to whether or not the wireless terminal wirelessly connected to the wireless communication apparatus is an authorized wireless terminal. The information includes at least fixed information other than the individual identifier. The evaluation unit () makes the evaluation based on a degree of matching between the information about the wireless terminal to be evaluated acquired by the information acquisition unit () and the information stored in the storage unit ().

Evaluating as to whether or not a wireless terminal is authorized

A charging member includes a cylindrical, hollow or solid, electroconductive base member, and an elastic layer device disposed on the electroconductive base member. When a surface profile of the charging member is subjected to a periodicity analysis in a circumferential direction, the surface profile has a maximum amplitude, in a period region of smaller than 5 mm, within a range of higher than or equal to 0.20 &#x3bc;m and smaller than or equal to 0.90 &#x3bc;m.

Charging member, process cartridge, and image forming apparatus

Wireless communication terminalreads connection setting information for making a connection to access point, the connection setting information including a plurality of identifiers of access point. Wireless communication terminalstores the read connection setting information. Wireless communication terminalreads the stored connection setting information and uses an identifier informed by access pointand the read connection setting information to set wireless communication connection with access point

Wireless communication

A plurality of discharge electrodes are grouped for respective gas passages that are defined by collecting electrodes ( ). The discharge electrodes in each group are connected to a common power supply unit for receiving output voltage through a diode provided for each group and are connected to a spark electrode ( ). The spark electrode is positioned such that it sparks between a hammer ( ) in a passageway of the hammer upon striking. Each group of the discharge electrodes has a ground unit to be grounded just before the collecting electrodes on both sides thereof are struck.

Electric precipitator and electric precipitation electrode used for the same

A method for bleaching pulp with ozone and, more specifically, to a method for bleaching pulp without deterioration of pulp quality. The starting material is a medium consistency pulp with easy handling during transfer and dewatering, namely, pulp of a consistency of about 10% by weight to 20% by weight. During the initial stage of the ozone bleaching process, the reaction velocity is maintained higher, while during the latter stage of the bleaching process, cellulose attack is prevented. Specifically, pulp bleaching is done with ozone, while the pulp consistency during the bleaching process is lowered in a stepwise manner within the range for a medium consistency pulp. The decreasing of the pulp consistency in a stepwise manner during the bleaching process involves bleaching a pulp of a consistency within the range of about 10 to 20% by weight with ozone, subsequently dewatering the pulp and then diluting the pulp with water to provide a pulp consistency lower than the pulp consistency before dewatering, repeating the cycle composed of the dehydration, the diluting and the ozone bleaching steps one or more times, whereby the pulp consistency is lowered within the range of medium consistency in a stepwise manner.

Growing community of inventors

Kanagawa, Japan

Takuya Yamamoto