Abstract: The present invention is directed to an inkjet recording apparatus 100 capable of performing recording continuously on both surfaces of a web, including a plurality of recording heads disposed on a substrate, driers for drying the web recorded by the recording heads, and guide rollers for guiding the web, in which a traveling path of the web is switchable so that the web passes between any selected adjacent ones of the recording heads, the recording head upstream of the position where the web passes performs recording on one surface of the web, and the recording head downstream of the position where the web passes performs recording on the other surface of the web, and an inkjet recording method using the same.

Abstract: A method of correcting print images in an electrophotographic printer wherein an image formed by a print head (3) on a peripheral surface of a photoconductor drum (1) is transferred and printed on a sheet of paper. The method comprises: furnishing the print head with a standard tacho signal in the form of pulses and thereby printing on a sheet of paper a check mark (9) for each given number of pulses of the standard tacho signal while the photoconductor drum makes one rotation; by means of a camera (10), detecting a periodic deviation in each spacing between successive such check marks; in response to the deviation in each spacing between the successive check marks, varying the pulse width of pulses of the standard tacho signal for each spacing between the successive check marks, thereby to provide a modified tacho signal; and effecting printing thereafter based on the modified tacho signal.

Abstract: A sheet-fed duplex printer comprises a pair of impression cylinders 6a, 6b and first and second electrophotographic printing units 7a and 7b. Each of the cylinders is provided on a peripheral surface thereof with a paper gripper for gripping a sheet of paper. The cylinders and printing units are so disposed relative to each other and suitably operated for printing on one face of the sheet of paper as it is conveyed following the peripheral surface of one cylinder, and for printing on the other face of the sheet of paper as it is conveyed following the peripheral surface of the other cylinder. This arrangement allows high precision and high speed printing of a sheet of paper large in size without increasing the entire apparatus length.

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: A toner supplier apparatus 1 is provided for stabilizing the concentration of toner reserved in a main tank. A concentration sensor for measuring the concentration of the toner is provided in a toner-feeding pipeway for supplying liquid toner from a main tank for adjusting the concentration to the developer apparatus. High concentration toner and diluent supplied to the main tank are controlled based on the concentration measured by the concentration sensor. Accordingly, accuracy of the toner supplier apparatus used for an electronic photograph printer in measuring the concentration of the toner can be improved, thereby permitting accurate control for the concentration in a printed image.

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: A cleanable electrophotographic printer that meets the requirement for high speed printing on a continuous web of paper as the printing medium and which minimizes the amount of toner that remains on the surface of a rotating transfer roller even in high-speed production, wherein the electrophotographic printer is provided with a carrier solution supply device disposed in an area upstream of a transfer roller cleaning device in the rotation direction of the rotating transfer roller for supplying the surface of the rotating transfer roller with a carrier solution.

Abstract: A method of wiping a line blade with a blade is disclosed that prevents premature wear and break of the blade and preserving its elastic deformation from soiling the environment.

Abstract: [Problem to be Solved] To provide an inkjet recording apparatus capable of adjusting a gap with high accuracy and easily. [Solution] The present invention provides an inkjet recording apparatus 100 including line heads 20 to 23 capable of recording on a recording medium 1, a head box 11 that houses the line heads 20 to 23, and gap adjustment cams 30 to 32 that abut on a lower surface of a bottom 11b in the head box 11, in which the head box 11 is slightly movable in an up-and-down direction by rotating the gap adjustment cams 30 to 32.

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: [Problem to be Solved] To provide a pressure purging device for an inkjet recording apparatus enabling pressure-purging only designated one of a plurality of recording heads and capable of preventing ink from leaking during the pressure purging.

Abstract: [Problem to be Solved] To provide, in an inkjet recording apparatus including a plurality of recording heads, an ink supply device for the inkjet recording apparatus capable of efficiently humidifying ink flowing through the recording heads to control the viscosity of the ink. [Solution] In an ink supply device for an inkjet recording apparatus including a back pressure tank 21, a distribution tank 12, a plurality of ink opening/closing electromagnetic valves 13, and a plurality of recording heads 14, and in which the distribution tank 12 is connected to the back pressure tank 21 via an ink supply path 24, the plurality of ink opening/closing electromagnetic valves 13 is directly attached to the distribution tank 12 while being connected to the plurality of recording heads 14 via a distribution supply pipe 15, in which the distribution tank 12 contains a humidification heater 71 for humidifying ink and a temperature sensor 72.

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 comprises a set charger positioned opposite to a surface of the developing roller, a liquid developer applying means disposed at one of a position is opposite to a surface of the developing roller and a position opposite to a surface of the cleaning roller, a first cleaning blade disposed in contact with a surface of the cleaning roller downstream the area of rotational contact of the cleaning roller with the developing roller in the rotation direction of the cleaning roller and a second cleaning blade disposed in contact with a surface of the developing roller downstream of the area of rotational contact of the cleaning roller with the developing roller in the rotation direction of the developing roller.

Abstract: [Objective] To provide an ink-jet recording apparatus capable of suppressing contamination of a recording medium, efficiently utilizing installation space, and carrying out printing continuously onto both surfaces of the recording medium.

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: A method of correcting print images in an electrophotographic printer wherein an image formed by a print head (3) on a peripheral surface of a photoconductor drum (1) is transferred and printed on a sheet of paper. The method comprises: furnishing the print head with a standard tacho signal in the form of pulses and thereby printing on a sheet of paper a check mark (9) for each given number of pulses of the standard tacho signal while the photoconductor drum makes one rotation; by means of a camera (10), detecting a periodic deviation in each spacing between successive such check marks; in response to the deviation in each spacing between the successive check marks, varying the pulse width of pulses of the standard tacho signal for each spacing between the successive check marks, thereby to provide a modified tacho signal; and effecting printing thereafter based on the modified tacho signal.

Abstract: A photoconductor drum cleaning apparatus in an electrophotographic printer is disclosed which is simple in makeup, which allows a wiping roll to be rotated to follow rotation of the photoconductor drum is rotated and to be serviced for a prolonged life and is capable of performing an improved cleaning operation.