Abstract: Disclosed is an inkjet printing apparatus including a connection switching device in a housing having external suction ports and an internal suction port being disposed at an equal distance from the center of rotation of a switching section, the external suction ports being connectable to a plurality of lines, the internal suction port being connected to a suction path for sucking the interior of the housing. The connection switching device selectively connects any of the plurality of external suction ports to the suction device by rotating the switching section Consequently, when the switching section is connected to the internal suction port, the interior of the housing is sucked, whereby ink is sucked from all the inkjet nozzles.

Abstract: An inkjet printing apparatus is selectively composed of a plurality of transportation units, i.e., an inlet unit, a first intermediate unit, a second intermediate unit, and an outlet unit, having a transport path with slopes in side view of a transportation direction from a paper feeder to a take-up roller. When the transportation units are connected, a connecting part of the transportation unit is an inclination change point VP of the transport path. This achieves maintained tension to the print medium. As above, the inkjet printing apparatus may be selectively composed of a plurality of transportation units. Accordingly, the inkjet printing apparatus is constructible by combination of the units for various type productions, leading to a suppressed stock.

Abstract: Disclosed is an inkjet printing apparatus including a connection switching device in a housing having external suction ports and an internal suction port being disposed at an equal distance from the center of rotation of a switching section, the external suction ports being connectable to a plurality of lines, the internal suction port being connected to a suction path for sucking the interior of the housing. The connection switching device selectively connects any of the plurality of external suction ports to the suction device by rotating the switching section Consequently, when the switching section is connected to the internal suction port, the interior of the housing is sucked, whereby ink is sucked from all the inkjet nozzles.

Abstract: Disclosed is an inkjet printing apparatus including a connection switching device in a housing having external suction ports and an internal suction port being disposed at an equal distance from the center of rotation of a switching section, the external suction ports being connectable to a plurality of lines, the internal suction port being connected to a suction path for sucking the interior of the housing. The connection switching device selectively connects any of the plurality of external suction ports to the suction device by rotating the switching section Consequently, when the switching section is connected to the internal suction port, the interior of the housing is sucked, whereby ink is sucked from all the inkjet nozzles.

Abstract: In an inkjet printing apparatus, heaters are enclosed with a heater casing, achieving accumulation of heated air and efficient performance of heating. A blowing fan blows air to the heaters. The heater casing includes a blowing port configured to narrow and blow warm air heated with the heaters to a transportation path outside the heater casing in a direction along the transportation path. The warm air narrowed at the blowing port obtains an increased air velocity thereof. In addition, uniform air-quantity distribution and uniform heat-quantity are obtainable. Moreover, the heaters face the transportation path. Consequently, the heaters are provided closer to the transportation path than a conventional external heater. This suppresses heat loss.

Abstract: An inkjet printing apparatus is selectively composed of a plurality of transportation units, i.e., an inlet unit, a first intermediate unit, a second intermediate unit, and an outlet unit, having a transport path with slopes in side view of a transportation direction from a paper feeder to a take-up roller. When the transportation units are connected, a connecting part of the transportation unit is an inclination change point VP of the transport path. This achieves maintained tension to the print medium. As above, the inkjet printing apparatus may be selectively composed of a plurality of transportation units. Accordingly, the inkjet printing apparatus is constructible by combination of the units for various type productions, leading to a suppressed stock.

Abstract: An inkjet printing apparatus includes a plurality of nozzles for discharging ink, a CIS (Contact Image Sensor) type scanner for reading, as image data, charts for correction printed in the ink discharged from the nozzles, light emitters for emitting light to the charts for correction, a scanner controller for causing the scanner to scan the charts for correction with a plurality of read conditions, a correction table creator for creating nozzle shading correction tables based on the image data read, and a shading corrector for carrying out shading correction for the nozzles based on the correction tables.

Abstract: In an inkjet printing apparatus, heaters are enclosed with a heater casing, achieving accumulation of heated air and efficient performance of heating. A blowing fan blows air to the heaters. The heater casing includes a blowing port configured to narrow and blow warm air heated with the heaters to a transportation path outside the heater casing in a direction along the transportation path. The warm air narrowed at the blowing port obtains an increased air velocity thereof. In addition, uniform air-quantity distribution and uniform heat-quantity are obtainable. Moreover, the heaters face the transportation path. Consequently, the heaters are provided closer to the transportation path than a conventional external heater. This suppresses heat loss.

Abstract: Each unit of an inkjet printing station includes chains arranged along a transportation path of a web paper. A holding mechanism is fixedly arranged on the chain. The holding mechanism holds both ends of a paper passing bar to which the web paper is attached. Driving the chain with a handle causes the holding mechanism to move. The paper passing bar is delivered between the units adjoining each other. Therefore, the paper passing bar is movable from one end to the other end of the inkjet printing station formed by the units. Moreover, when specifications are changed for changing combination of the units, the combination can be made optionally.

Abstract: An inkjet printing apparatus is provided, which has a simple construction, and is yet capable of reducing ink consumption and cleaning inkjet heads promptly. The inkjet printing apparatus includes connector caps 51a-51l for connecting tubes communicating with suction caps, a cap support 54 supporting the connector caps 51a-51l, a switch element 60 for switching to a sucking state one of the connector caps 51a-51l to which the tubes are connected, and a stepping motor 57 for supporting and rotating the switch element 60.

Abstract: Disclosed is an inkjet printing apparatus including a connection switching device in a housing having external suction ports and an internal suction port being disposed at an equal distance from the center of rotation of a switching section, the external suction ports being connectable to a plurality of lines, the internal suction port being connected to a suction path for sucking the interior of the housing. The connection switching device selectively connects any of the plurality of external suction ports to the suction device by rotating the switching section Consequently, when the switching section is connected to the internal suction port, the interior of the housing is sucked, whereby ink is sucked from all the inkjet nozzles.

Abstract: An inkjet printing apparatus 100 includes an inkjet head holder 11 holding inkjet heads 2, and a pair of head cap holders 12 and 13 holding head caps 3. When the inkjet head holder 11 is in a raised position, the head cap holders 12 and 13 are arranged as horizontally juxtaposed in a capping position, where the respective inkjet heads 2 and the respective head caps 3 are opposed to each other, below the inkjet head holder 11. When the inkjet head holder 11 is in a lowered position, the head cap holders 12 and 13 are arranged as vertically superposed in a withdrawn position laterally of a vertical movement area of the inkjet head holder 11.

Abstract: Each unit of an inkjet printing station includes chains arranged along a transportation path of a web paper. A holding mechanism is fixedly arranged on the chain. The holding mechanism holds both ends of a paper passing bar to which the web paper is attached. Driving the chain with a handle causes the holding mechanism to move. The paper passing bar is delivered between the units adjoining each other. Therefore, the paper passing bar is movable from one end to the other end of the inkjet printing station formed by the units. Moreover, when specifications are changed for changing combination of the units, the combination can be made optionally.

Abstract: An inkjet printing apparatus 100 includes an inkjet head holder 11 holding inkjet heads 2, and a pair of head cap holders 12 and 13 holding head caps 3. When the inkjet head holder 11 is in a raised position, the head cap holders 12 and 13 are arranged as horizontally juxtaposed in a capping position, where the respective inkjet heads 2 and the respective head caps 3 are opposed to each other, below the inkjet head holder 11. When the inkjet head holder 11 is in a lowered position, the head cap holders 12 and 13 are arranged as vertically superposed in a withdrawn position laterally of a vertical movement area of the inkjet head holder 11.

Abstract: An inkjet printing apparatus is provided, which has a simple construction, and is yet capable of reducing ink consumption and cleaning inkjet heads promptly. The inkjet printing apparatus includes connector caps 51a-51l for connecting tubes communicating with suction caps, a cap support 54 supporting the connector caps 51a-51l, a switch element 60 for switching to a sucking state one of the connector caps 51a-51l to which the tubes are connected, and a stepping motor 57 for supporting and rotating the switch element 60.

Abstract: An image recording apparatus includes a recording head, a recording head move mechanism, and a light quantity correcting device. The recording head has a light source, an optical lens, a light emitting portion and a contact portion. The light quantity correcting device has a light quantity sensor with a light receiving portion, a cover glass plate, a base, a cylindrical cover, and a spring for biasing the cover toward the recording head.

Abstract: An original or a photosensitive film is held by a sheet holder and the sheet holder is fixed to the drum of an image reading scanner or an image recording scanner by a row of hooks planted on the drum. A row of holes corresponding to the row of hooks are formed at each of the opposing ends of the sheet holder. A hook is composed of: a stem, a lever rotatably attached with a pin to the stem, and a plate urged upward by a spring against the bottom of the lever. A plane is formed at a side of the bottom of the lever. First the levers of the hooks are raised upright and the holes of an end of the sheet holder are engaged with the hooks. After surrounding the drum with the sheet holder, the holes at the other end of the sheet holder are engaged with the hooks and the levers are turned to a lying position, where the levers are stable because the plate is urged upward against the side plane of the lever.

Abstract: In a twin-wire former in a paper machine, an operation of a hybrid former mode and that of a gap former mode are conducted, and papers of quality conforming to the kind of papers can be made in a wide range of basis weight with regard to multiple kinds of papers.In the twin-wire former, a forming roll, which guides a top wire so that it can approach to a bottom wire to pinch the stock of paper and run approximately horizontally, is made adjustable in an up and down direction.Upper surfaces of blades of a forming board and a forming shoe provided inside a loop of the bottom wire, are upwardly convex so that dewatering can be effected mainly downward.