Abstract: The present invention provides an electrophotographic photoreceptor and an electrophotographic member, which have superior mold releasing and sliding properties and are able to maintain these properties over long periods of time, the photoreceptor comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer, the electrophotographic member comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer and filling voids in the first layer, and further provides a process cartridge equipped with said electrophotographic photoreceptor or said electrophotographic member, and an image forming apparatus.

Abstract: An image forming apparatus such as a tandem type color image forming apparatus is provided. The image forming apparatus includes a transfer belt that rotates in a rotating direction in which a toner image is transferred. A plurality of color latent image carrying members are arranged successively along the rotating direction so as to form various color toner images, and a monochrome latent image carrying member is located at any one end of the color latent image carrying members so as to form a monochrome toner image. A plurality of color transfer rollers and a monochrome transfer roller are arranged opposite to the color image carrying members and the monochrome image carrying member, respectively, with the transfer belt therebetween. A roller supporting member supports all of the color transfer rollers. A roller shifting unit moves the roller supporting member in a direction in which the color transfer rollers move toward or away from the color latent image carrying members.

Abstract: The present invention provides an electrophotographic photoreceptor and an electrophotographic member, which have superior mold releasing and sliding properties and are able to maintain these properties over long periods of time, the photoreceptor comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer, the electrophotographic member comprising a first layer and a second layer, which includes a fluororesin layer, externally disposed on the first layer to form an outermost layer and filling voids in the first layer, and further provides a process cartridge equipped with said electrophotographic photoreceptor or said electrophotographic member, and an image forming apparatus.

Abstract: For sealing a container (2) consisting of a barrel portion (3) and a cap portion (4) threaded and tightened on the barrel portion, the sealing label (1) includes a lower portion (1A) for substantially wrapping the barrel portion and an upper portion (1B) for substantially wrapping the cap portion. The sealing label includes horizontal perforations (10) consisting of cut segments (11) and uncut segments (12; 13) extending along a border between the upper portion and the lower portion; a knob portion (1a) disposed at an edge of the upper portion; and inclined perforations (20) consisting of cut segments (21) and uncut segments (22) extending obliquely in the upper portion from the knob portion to the horizontal perforations.

Abstract: The present invention provides a cleaning member including melamine resin foam in at least a portion that contacts an object to be cleaned. A charging device and a transfer device including the cleaning member are provided as well. An image forming apparatus including at least the cleaning member is also provided. In the image forming apparatus the cleaning member cleans at least one of a charge roll of the charging device, an image carrier, and a transfer roll of the transfer device.

Abstract: The present invention discloses: (1) an electrically conductive member including: a cylindrical base body; and electrically conductive powder sealed inside of the cylindrical base body in a substantially flowable state, or (2) an electrically conductive member including: a cylindrical base body; and electrically conductive powder sealed inside of the cylindrical base body so as not to completely fill the inner volume thereof, or (3) an electrically conductive member including: a cylindrical base body; and electrically conductive powder sealed inside of the cylindrical base body so as to fill only from 20 to 95% of the inner volume thereof. Moreover, the present invention discloses an image forming apparatus equipped with any of the electrically conductive members.

Abstract: An image forming device which is capable of preventing generation of toner filming and obtaining a stable image quality without defects over a long period and which is environmentally friendly. The image forming device, for forming an image with a spherical toner, includes image holding members, contact type charging member, exposing member, developing member, and transfer member. A toner shape change ratio (Tt) of deformed toner particles passed between the contacting portions of the image holding members and the charging member is in a range of 50 to 100 percent.

Abstract: An image forming device which is capable of preventing generation of toner filming and obtaining a stable image quality without defects over a long period and which is environmentally friendly. The image forming device, for forming an image with a spherical toner, comprises image holding members, contact type charging means, exposing means, developing means and transfer means. A toner shape change ratio (Tt) of deformed toner particles passed between the contacting portions of the image holding members and the charging means is in a range of 50 to 100 percent.

Abstract: The present invention discloses: (1) an electrically conductive member including: a cylindrical base body; and electrically conductive powder sealed inside of the cylindrical base body in a substantially flowable state, or (2) an electrically conductive member including: a cylindrical base body; and electrically conductive powder sealed inside of the cylindrical base body so as not to completely fill the inner volume thereof, or (3) an electrically conductive member including: a cylindrical base body; and electrically conductive powder sealed inside of the cylindrical base body so as to fill only from 20 to 95 % of the inner volume thereof. Moreover, the present invention discloses an image forming apparatus equipped with any of the electrically conductive members.

Abstract: The present invention provides a cleaning member including melamine resin foam in at least a portion that contacts an object to be cleaned. A charging device and a transfer device including the cleaning member are provided as well. An image forming apparatus including at least the cleaning member is also provided. In the image forming apparatus the cleaning member cleans at least one of a charge roll of the charging device, an image carrier, and a transfer roll of the transfer device.

Abstract: An image forming apparatus includes an image bearing member; an image forming device for forming an image on the image bearing member, the image forming device being provided with a charging member which is disposed in contact or proximity with the image bearing member to electrically charge the image bearing member; wherein the charging member is supplied with an oscillating voltage, and there is provided a voltage set period in which a peak-to-peak voltage of the oscillating voltage is higher in a period in which the image is not formed on the image bearing member than in a period in which the image is formed on the image bearing member.

Abstract: A charging member for charging a charge-receiving member, such as an electrophotographic photosensitive member, by disposing the charging member in contact with the charge-receiving member and applying a voltage to the charging member is constituted by disposing an electroconductive support, an elastic layer, and a surface coating layer having a tensile modulus of above 2000 kgf/cm.sup.2 to at most 30000 kgf/cm.sup.2 in this order. The coating layer may preferably contain an acrylic polymer-modified urethane resin. The charging member is effective in providing the charge-receiving member with a nip portion showing a uniform electric resistance distribution for a long period to provide excellent images.

Abstract: A contact charging member is used in a charging device for charging an image carrier by contacting the contact charging member to which a voltage is impressed with the image carrier. The contact charging member has at least a supporting member and a coating member. The coating member is a seamless tube consisting of a resin blend of a flexible resin and a heat resistant resin.

Abstract: An opening of a developer container is sealed by a sealing member which is easy to tear in a predetermined direction. The sealing member is composed of a main portion having a tear strip portion, and a leader portion protruding from the main portion as an extension from the tear strip portion. The main portion seals the opening. The tear strip portion is torn off from the main portion by pulling the leader portion in the predetermined direction. The main portion is adhered to an adhesion area surrounding the opening. The adhesion area has a box-like area recessed in the predetermined direction, at a location facing a part of the main portion adjacent to the base portion of the tear strip portion.

Abstract: The present invention provides a cleaning member including melamine resin foam in at least a portion that contacts an object to be cleaned. A charging device and a transfer device including the cleaning member are provided as well. An image forming apparatus including at least the cleaning member is also provided. In the image forming apparatus the cleaning member cleans at least one of a charge roll of the charging device, an image carrier, and a transfer roll of the transfer device.