Abstract: An electrophotographic apparatus that can effect favorable transfer of a toner image onto a medium under a nip pressure between a transfer roller and a backup roller and a potential difference between the transfer and backup rollers even if the medium has a high insulating property, such as due to its being thick.

Abstract: An ink jet recording apparatus in which a head supporting plate having a line head mounted thereon which comprises a plurality of short heads staggered is attached to a carriage whereby recording is performed by ink jet printing with the line head on a recording medium positioned beneath the carriage is rendered capable of using ordinary short heads.

Abstract: An ink jet recorder that includes line heads (4) having a plurality of nozzle heads (41), main tanks (13) placed outside of the line heads (4) to store ink; an ink supply passage (13a, 49a, 49c) that connects the main tanks (13) to the associated nozzle heads (41), and distribution tanks (6) placed in each line head (4). The number of supply tube connections (67) provided in the distribution tank (6) is smaller than that of the nozzle heads (41) arranged in the line head (4).

Abstract: [Problem to be Solved] To provide an inkjet recording apparatus that is easy to maintain and is compact. [Solution] The present invention provides an inkjet recording apparatus 100 including a line head 20 capable of printing on a recording medium 1, and a housing 11 with the line head 20 attached, in which the line head 20 is slid along a guide groove 12 provided in the housing 11 so that the line head 20 is detachably attached.

Abstract: It is sought to have a cap member sized to cover the entire lower surface of an ink jet head having numbers of nozzle heads, to improve intimacy of contact of the cap member with a carriage of the ink jet head, to obtain an enhanced airtightness between them and to enable the cap member to be manufactured roughly and at low cost.

Abstract: To enable fabric of any length to be continuously printed without causing a textile printing unit to cease its operation, a textile printing method is provided in which fabric is conveyed by a conveyer belt and passed through a printing section to print on the fabric, the printing section having a textile printing ink jet printer disposed opposite the conveyer belt, wherein the printing section is continuously supplied with the fabric comprising a plurality of successive sheets of fabric, each sheet having a given length, such a sheet of fabric for supply into the printing section having a terminal end tied with a starting end of a sheet of a fabric for continuous succeeding supply in the state that the terminal and starting ends are in contact with each other.

Abstract: A drum-type drying device according to the invention includes a cylindrical drum section that is rotatably supported and rotated by winding a base material on the drum section, engaging portions that are disposed in an inner cavity of the drum section, and a heating section that includes engaged portions detachably engaged with the engaging portions.

Abstract: A wet type developing apparatus is provided which allows printing in a quality that is stable at an increased printing speed and also with changes in physical property of a liquid developer. The wet type developing apparatus to this end includes a liquid developer feed pathway which comprises a developing roller 7 for feeding the liquid developer onto a photoconductor drum 3; an anilox roller 9 immersed in part in the liquid developer and driven to rotate in rotational contact with the developing roller; and a doctor blade 11 disposed in contact with a surface of the anilox roller for controlling the rate of drawing up of the liquid developer. The developing and anilox rollers have their peripheral surfaces moving in an identical direction and at an identical rate of movement in an area of their rotational contact.

Abstract: Fluttering of paper traveling opposite to and parallel to a nozzle width region of an ink jet head is held down, thereby improving the printing quality. An ink jet recording apparatus comprises an ink jet printer including printing units (7, 7?) whereby a sheet of paper (2) traveling in a paper passage in the form of an arch shaped by a plurality of guide rollers (12a-12h) is printed by a plurality of ink jet heads (6a-6d, 6a?-6d?). The ink jet heads of the printing units comprise ink jet heads of on-demand type having a plurality of nozzle rows of a nozzle width region in a direction of travel of paper. The paper passage opposite to nozzle faces of each ink jet head nozzle defined by two guide rollers (12a, 12b) positioned at an upstream and at a down-stream side in the direction of travel of paper, respectively.

Abstract: In an ink jet printer having a plural number of line heads arranged in a paper printing direction, it is sought to render the printing density high in the nozzle row direction without the need to exchange the line heads. The invention provides an ink jet printer in which line heads other than at least one of the line heads 3 are each displaceable by a distance that is equal to a part per the plural number of a nozzle pitch in the line head in a direction of the nozzle row.

Abstract: It is desirable that the entire ink to be furnished to the nozzle head be deaerated efficiently, the entire ink including a portion of ink recovered from the purge section. Accordingly, an ink furnishing unit in an ink jet recorder is provided, which comprises a back pressure tank 15 connected to a nozzle head 2 via an ink supply passage, a main tank 9 connected to the back pressure tank via a main supply passage 16 provided with a main ink pump 18 therein, a recovery tank 7 connected to the main tank via a return passage provided with an ink pump 22 therein, and a purge cap 5 connected to the recovery tank via a recovery passage 8 provided with a purge pump 6 therein, the purge cap being opposed to the nozzle head when purging, wherein a deaerator 17 is disposed in the main supply passage connecting the main tank and the back pressure tank and the back pressure tank is connected to an upstream of the purge pump in the recovery passage via a three way directional control valve 30.

Abstract: An ink jet recording apparatus in which a head supporting plate having a line head mounted thereon which comprises a plurality of short heads staggered is attached to a carriage whereby recording is performed by ink jet printing with the line head on a recording medium positioned beneath the carriage is rendered capable of using ordinary short heads.

Abstract: An ink jet recording apparatus in which a fabric as a recording medium is intermittently conveyed in an ink jet recording section is capable of printing an image on the fabric with precision and at high quality. The ink jet recording section of serial printing type includes a conveyer for intermittently conveying the fabric.

Abstract: A wet type developing apparatus is disclosed which can eliminate the need to provide a separately built cleansing unit and, moreover, makes it unnecessary to dismount a developer supply unit for its cleansing operation and to perform its subsequent re-mounting operation. The apparatus in which a developing roller 2 is in rotational contact with a rotating photoconductor drum 1 and an electrostatic latent image made on a surface of the photoconductor drum is developed with a liquid developer 6 supplied onto the developing roller from a developer supply roller 3 whose surface is in part immersed in the liquid developer reserved in a developer reservoir 5, includes a cleansing arrangement, comprising a unit or units 7 and/or 8, which is disposed at a site in the developer reservoir which is always immersed in the liquid developer for cleansing a portion of the developer supply roller which is immersed in the liquid developer.

Abstract: To meet with the requirement for high-speed printing with continuous paper used as its recording medium and to better clean a transfer roller surface in high-speed production as well, an electrophotographic printer is provided comprising: a carrier liquid supply unit 11 disposed at a portion of the circumference of a transfer roller 2 between a position of image transfer onto a recording medium 7 and a transfer roller cleaning device 12 and including a carrier liquid supply roll 13 in rotational contact with a surface of the transfer roller 2 for supplying a carrier liquid onto the surface of the transfer roller 2, wherein the transfer roller cleaning device comprises: a cleaning roll 17 rotating in rubbing contact with the surface of the transfer roller and having a bias voltage applied thereto which is of a polarity opposite to that of a residual toner; a peripheral surface scraping blade 18 positioned downstream of the cleaning roll in the rotation direction of the transfer roller and in contact with a per

Abstract: To enable fabric of any length to be continuously printed without causing a textile printing unit to cease its operation, a textile printing method is provided in which fabric is conveyed by a conveyer belt and passed through a printing section to print on the fabric, the printing section having a textile printing ink jet printer disposed opposite the conveyer belt, wherein the printing section is continuously supplied with the fabric comprising a plurality of successive sheets of fabric, each sheet having a given length, such a sheet of fabric for supply into the printing section having a terminal end tied with a starting end of a sheet of a fabric for continuous succeeding supply in the state that the terminal and starting ends are in contact with each other.

Abstract: A developer feeder for wet developing apparatus having a developing roller rotationally engaged with a photoconductor drum and a feed roll in part immersed in a liquid developer and rotationally engaged with the developing roller for supplying the liquid developer onto the developing roller can be made to furnish the peripheral surface of the developing roller with the liquid developer even in thickness by using a plurality of feed rollers which are not mesh rollers but whose peripheral surfaces are smooth and which are arranged circumferentially of the rotational developing roller.

Abstract: An ink supplier for an ink jet recorder is provided. The ink supplier includes a recording head, a main ink reservoir, and a subsidiary ink reservoir connected to the main ink reservoir for replenishment with ink from the main ink reservoir. A position head of the ink liquid level in the subsidiary ink reservoir is maintained substantially constant relative to a printing head face of the recording head.

Abstract: An ink jet recorder that includes line heads (4) having a plurality of nozzle heads (41), main tanks (13) placed outside of the line heads (4) to store ink; an ink supply passage (13a, 49a, 49c) that connects the main tanks (13) to the associated nozzle heads (41), and distribution tanks (6) placed in each line head (4). The number of supply tube connections (67) provided in the distribution tank (6) is smaller than that of the nozzle heads (41) arranged in the line head (4).

Abstract: It is desirable that the entire ink to be furnished to the nozzle head be deaerated efficiently, the entire ink including a portion of ink recovered from the purge section. Accordingly, an ink furnishing unit in an ink jet recorder is provided, which comprises a back pressure tank 15 connected to a nozzle head 2 via an ink supply passage, a main tank 9 connected to the back pressure tank via a main supply passage 16 provided with a main ink pump 18 therein, a recovery tank 7 connected to the main tank via a return passage provided with an ink pump 22 therein, and a purge cap 5 connected to the recovery tank via a recovery passage 8 provided with a purge pump 6 therein, the purge cap being opposed to the nozzle head when purging, wherein a deaerator 17 is disposed in the main supply passage connecting the main tank and the back pressure tank and the back pressure tank is connected to an upstream of the purge pump in the recovery passage via a three way directional control valve 30.