Abstract: A developer collecting device includes a housing in which an opening disposed opposite to a developer holding member is formed, a collection member that is disposed to be capable of coming in contact with and being separated from the developer holding member and that detaches the developer and collects the detached developer in the housing, a sealing member that is disposed to be capable of coming in contact with and being separated from the developer holding member and that seals up a gap between the developer holding member and the housing, a suction passage to which a suction unit suctioning the developer into the housing is connected, a developer transport unit that transports the developer to one end of the housing, and a filtration member that is tilted so that at least an upper part thereof overlaps with the upside of the developer transport unit in a plan view.

Abstract: An image forming apparatus includes a housing provided with an opening opposed to a developer carrying member that carries developer; a collecting member provided along a downstream edge of the opening in a transporting direction of the developer and capable of coming into contact with and separating from the developer carrying member; a sealing member provided along an upstream edge of the opening in the transporting direction; a suction member that sucks air from the opening; a suction path provided between the opening and the suction member; an opening-closing unit that opens or closes the suction path; and a controller that controls the opening-closing unit so as to open the suction path at a time that is before separation of the collecting member from the developer carrying member and a predetermined time period after the time of contact between the collecting member and the developer carrying member.

Abstract: A developer collecting device includes a housing provided with an opening opposed to a developer carrying member, a collecting member provided along an edge of the opening at a downstream end of the opening in a transporting direction in which the developer carrying member transports the developer, a sealing member provided along an edge of the opening at an upstream end of the opening in the transporting direction, a suction path that extends along a longitudinal direction of the housing and that is connected to a suction unit for sucking the developer into the housing, a developer transporting unit that is provided between the opening and the suction path and that transports the developer collected in the housing, a filter member disposed between the developer transporting unit and the suction path, and a hood member disposed between the opening and the filter member and separated from the filter member.

Abstract: An image forming apparatus includes a transfer member onto a front side of which an image is transferred, a rotary member around which the transfer member is wrapped, a guide member provided at an end portion of an axial direction of the rotary member, a regulating member, a first reference mark, a second reference mark, a first detector, a second detector, and a controller. The regulating member is located on a reverse side of the transfer member, and restricts skew of the transfer member by contacting the guide member. The first and second reference marks are on edge sides of the transfer member in the axial direction of the rotary member. The first and second detectors detect the first and second reference marks, respectively. The controller controls alignment of the image on the transfer member in accordance with a detection result of the first and second detectors.

Abstract: There is provided a developer recovery device including: a casing; a recovery member disposed along an edge portion of the aperture portion; a sealing member disposed along an edge portion at a conveyance direction upstream side of the aperture portion; a moving section that moves the recovery member and the sealing member between a position of being touched against the developer-bearing member and a position of being apart from the developer-bearing member; a suction section that sucks the developer separated from the developer-bearing member into the casing; and a filter that is long in the length direction of the aperture portion and that is disposed in the casing between the aperture portion and the suction section with an inclination such that a lower portion of the filter is further away from the aperture portion than an upper portion of the filter.

Abstract: A warpage leveling unit includes a surface roughening member that is provided to oppose to a side end portion of an image carrier which has an endless-belt-shape, is entrained around a plurality of rollers, and carries an image on a surface of the image carrier, wherein the surface roughening member comes into contact with a surface of the side end portion which is warped.

Abstract: An image forming apparatus includes a housing provided with an opening opposed to a developer carrying member that carries developer; a collecting member provided along a downstream edge of the opening in a transporting direction of the developer and capable of coming into contact with and separating from the developer carrying member; a sealing member provided along an upstream edge of the opening in the transporting direction; a suction member that sucks air from the opening; a suction path provided between the opening and the suction member; an opening-closing unit that opens or closes the suction path; and a controller that controls the opening-closing unit so as to open the suction path at a time that is before separation of the collecting member from the developer carrying member and a predetermined time period after the time of contact between the collecting member and the developer carrying member.

Abstract: An image forming apparatus includes a transfer member onto a front side of which an image is transferred, a rotary member around which the transfer member is wrapped, a guide member provided at an end portion of an axial direction of the rotary member, a regulating member, a first reference mark, a second reference mark, a first detector, a second detector, and a controller. The regulating member is located on a reverse side of the transfer member, and restricts skew of the transfer member by contacting the guide member. The first and second reference marks are on edge sides of the transfer member in the axial direction of the rotary member. The first and second detectors detect the first and second reference marks, respectively. The controller controls alignment of the image on the transfer member in accordance with a detection result of the first and second detectors.

Abstract: A developer collecting device includes a housing provided with an opening opposed to a developer carrying member, a collecting member provided along an edge of the opening at a downstream end of the opening in a transporting direction in which the developer carrying member transports the developer, a sealing member provided along an edge of the opening at an upstream end of the opening in the transporting direction, a suction path that extends along a longitudinal direction of the housing and that is connected to a suction unit for sucking the developer into the housing, a developer transporting unit that is provided between the opening and the suction path and that transports the developer collected in the housing, a filter member disposed between the developer transporting unit and the suction path, and a hood member disposed between the opening and the filter member and separated from the filter member.

Abstract: A developer collecting device includes a housing in which an opening disposed opposite to a developer holding member is formed, a collection member that is disposed to be capable of coming in contact with and being separated from the developer holding member and that detaches the developer and collects the detached developer in the housing, a sealing member that is disposed to be capable of coming in contact with and being separated from the developer holding member and that seals up a gap between the developer holding member and the housing, a suction passage to which a suction unit suctioning the developer into the housing is connected, a developer transport unit that transports the developer to one end of the housing, and a filtration member that is tilted so that at least an upper part thereof overlaps with the upside of the developer transport unit in a plain view.

Abstract: In a paper sheet transporting device, in an air duct portion of a suction duct, a suction confluence opening that collects air that is sucked and allows the air to pass through is disposed in a position included in a region where suction openings whose suction force is relatively the highest of plural suction openings exist and which position is away from the inner surface side of the suction surface portion, with the air duct portion being formed in a shape where the opening cross-sectional area of an air duct becomes relatively narrower away from the suction confluence opening in the rotating axial direction of a transport belt.

Abstract: A primary transfer device includes a primary transfer roll that is capable of being engaged with and disengaged from an intermediate transfer member to which a developer image is primarily transferred; and a setting-changing unit that changes a setting of pressure of the primary transfer roll to the intermediate transfer member in accordance with kind of a recording medium to which the developer image is secondarily transferred, wherein the setting-changing unit has an irregular medium transfer mode for a case where the recording medium to which the developer image is a recording medium having irregularities formed on a surface thereof, and an ordinary transfer mode for a case where the recording medium is a recording medium other than the recording medium having the irregularities, wherein a pressure set in the irregular medium transfer mode is smaller than that set in the ordinary transfer mode.

Abstract: There is provided an image forming apparatus including: a transfer-receiving member onto which developer images are transferred and superimposed in sequence by switching over plural developing units that develop latent images on a latent image holding body with a developer to form developer images; a primary transfer section that primary transfers the developer image on the latent image holding body onto the transfer-receiving member; a secondary transfer section that secondary transfers the developer image on the transfer-receiving member onto a recording medium; and a selection section that selects a combination of a first process speed for the primary transfer and a second process speed for the secondary transfer according to the number of developing units employed.

Abstract: There is provided a developer recovery device including: a casing; a recovery member disposed along an edge portion of the aperture portion; a sealing member disposed along an edge portion at a conveyance direction upstream side of the aperture portion; a moving section that moves the recovery member and the sealing member between a position of being touched against the developer-bearing member and a position of being apart from the developer-bearing member; a suction section that sucks the developer separated from the developer-bearing member into the casing; and a filter that is long in the length direction of the aperture portion and that is disposed in the casing between the aperture portion and the suction section with an inclination such that a lower portion of the filter is further away from the aperture portion than an upper portion of the filter.

Abstract: In a paper sheet transporting device, in an air duct portion of a suction duct, a suction confluence opening that collects air that is sucked and allows the air to pass through is disposed in a position included in a region where suction openings whose suction force is relatively the highest of plural suction openings exist and which position is away from the inner surface side of the suction surface portion, with the air duct portion being formed in a shape where the opening cross-sectional area of an air duct becomes relatively narrower away from the suction confluence opening in the rotating axial direction of a transport belt.

Abstract: A primary transfer device includes a primary transfer roll that is capable of being engaged with and disengaged from an intermediate transfer member to which a developer image is primarily transferred; and a setting-changing unit that changes a setting of pressure of the primary transfer roll to the intermediate transfer member in accordance with kind of a recording medium to which the developer image is secondarily transferred, wherein the setting-changing unit has an irregular medium transfer mode for a case where the recording medium to which the developer image is a recording medium having irregularities formed on a surface thereof, and an ordinary transfer mode for a case where the recording medium is a recording medium other than the recording medium having the irregularities, wherein a pressure set in the irregular medium transfer mode is smaller than that set in the ordinary transfer mode.

Abstract: A warpage leveling unit includes a surface roughening member that is provided to oppose to a side end portion of an image carrier which has an endless-belt-shape, is entrained around a plurality of rollers, and carries an image on a surface of the image carrier, wherein the surface roughening member comes into contact with a surface of the side end portion which is warped.

Abstract: An image forming apparatus registers both sides of sheets with great precision in a sheet transportation direction in both-side image formation. The image forming apparatus includes: photoconductive drums holding toner images; an intermediate transfer belt temporarily holding the toner images; a secondary transfer roll that transfers the toner images to a sheet in a transfer unit; a registration roll rotating toward the transfer unit being in sheet feeding timing; a fixing unit fixing the toner images transferred to a first side of the sheet; reversion transportation paths reversing the sheet and again transporting the sheet to the transfer unit; a first sensor detecting the image of the first side of the sheet; and a second sensor that detects the toner images held in the intermediate transfer belt.

Abstract: Image formation condition is available, which hardly causes imperfections of the image quality. A full-color image formation system selects plural secondary transfer conditions in a secondary transfer unit within a specific range, forms test charts according to each of the secondary transfer conditions selected, and prints them out. A user checks by viewing the test charts printed on each recording sheet, and selects a page number of the sheet where the user evaluated an image quality as the best; and the image formation system sets the secondary transfer condition for the sheet as a standard secondary transfer condition thereafter.

Abstract: The present invention enables registration adjustments during actual use of an image forming apparatus. A test pattern is formed on a sheet in a full-color image forming apparatus and the test pattern formed on the sheet is read in an image read unit. From the result of reading the test pattern, misregistrations of vertical and horizontal scaling factors, parallelism, squareness, skew, side registration, and lead registration in the test pattern are determined, and mounting positions, drive timings, drive speeds, and the like of constituent members are adjusted.