Abstract: An ink-jet printer including a printing part that is provided with a plurality of printing heads and a distribution tank, a buffer tank, a heat exchanger, a manifold, a main flow pipe that successively connects the buffer tank, the heat exchanger and the manifold to one another, a sub-flow pipe that connects the manifold and the buffer tank with each other, a supply flow pipe for connecting the manifold and the printing part with each other, a collection flow pipe for connecting the printing part and the buffer tank with each other, and pumps respectively installed on the sub-flow pipe, the supply flow pipe and the collection flow pipe. The main flow pipe and the sub-flow pipe constitute a first circulation flow passage for circulating ink, and the main flow pipe, the supply flow pipe and the collection flow pipe constitute a second circulation flow passage for circulating the ink.

Abstract: An inkjet printer collects ink mist, and eliminates the necessity of frequent filter cleaning and replacement. Vents are on an upstream side in a conveying direction of a printing medium of the print heads of a printing part, blowout air volume of the respective vents can be adjusted, collection ports are on a downstream side in the conveying direction of the printing medium of the respective print heads, suction air volume of the collection ports can be adjusted, and an ink mist collecting parts are each provided which liquefies and collects ink mist contained in air sucked from any one of the collection ports while the air passes through filters. The blowout air volumes of the respective print heads and the suction air volumes are set to air volumes according to amounts of generated ink mist, and ink mist is collected according to differences in amounts of generated ink mist.

Abstract: A compact ink drying apparatus is capable of drying ink ejected to a resin substrate. The ink drying apparatus has a hot air dryer, a hot air supplying part, and an exhausting part. The hot air dryer has a drying furnace, a substrate conveying path formed as a spirally shaped path in the drying furnace, and substrate drying ducts blowing hot air to a surface of a resin substrate on which ink is ejected conveyed along the substrate conveying path to heat ink and exhausting water vapor generated by heating of ink. The hot air supplying part is outside the drying furnace and supplies hot air into the substrate drying ducts, and the exhausting part is outside the drying furnace and exhausts air in the drying furnace through the substrate drying ducts.

Abstract: To provide a printing device that can carry out a temperature adjustment of air in a simple manner and also provide superior energy efficiency, the present invention relates to a printing device 100 that is constituted by a printing part 5, a first air heater part 6a and a second air heater part 6b, as well as a control part 4, and each of the first air heater part 6a and the second air heater part 6b is constituted by at least one or more air heaters 6, and the control part 4 carries out a first control in which the first air heater part 6a is turned ON, while the second air heater part 6b is simultaneously turned OFF and a second control in which the first air heater part 6a is turned OFF, while the second air heater part 6b is simultaneously turned ON, with the first control and the second control being alternately switched in each fixed period.

Abstract: A drying device H is provided with: a first heating roller part 10 and a second heating roller part 20 that guide a printed object X and are capable of heating the printed object X; a first heating part 11 that is formed so as to be opposed to the outer circumferential surface of the first heating roller part 10 and a second heating part 21 that is formed so as to be opposed to the outer circumferential surface of the second heating roller part 20, wherein after the printed object X has been guided to the first heating roller part 10 on the upstream side, it is guided to the second heating roller part 20 on the downstream side, with the setting temperature of the second heating roller part 20 being made higher than the setting temperature of the first heating roller part 10, and an ink-jet printing device I equipped with such a heating device.

Abstract: An inkjet printer collects ink mist, and eliminates the necessity of frequent filter cleaning and replacement. Vents are on an upstream side in a conveying direction of a printing medium of the print heads of a printing part, blowout air volume of the respective vents can be adjusted, collection ports are on a downstream side in the conveying direction of the printing medium of the respective print heads, suction air volume of the collection ports can be adjusted, and an ink mist collecting parts are each provided which liquefies and collects ink mist contained in air sucked from any one of the collection ports while the air passes through filters. The blowout air volumes of the respective print heads and the suction air volumes are set to air volumes according to amounts of generated ink mist, and ink mist is collected according to differences in amounts of generated ink mist.

Abstract: An inkjet printer capable of suppressing temperature unevenness of a drying drum itself as much as possible having a printing part for applying ink to a medium before printing, a drying drum for heating and drying a medium after printing having the ink applied in contact with an outer circumferential face thereof, and a controller capable of individually controlling heating of a plurality of sections obtained by dividing the drying drum along a plane perpendicular to a shaft direction thereof. Each of the respective sections is mounted with a heater part capable of heating the corresponding section, and heating of the heater parts of all of the sections is continuously controlled individually by the controller.

Abstract: A heating drum, which guides a long-sized medium and also heats and dries the medium, includes a cylinder-shaped main body part, disc-shaped limb parts attached to the end parts of the main body part, and a shaft core attached to the limb parts. On an edge of an inner circumferential surface of the main body part, a cut-out part extending in the circumferential direction is formed. A groove part also extending in the circumferential direction is formed on the inner circumferential surface on an inner side from the cut-out part of the main body part. The cut-out part and the groove part are in parallel with each other, and the limb part is fitted to the cut-out part. A claw part is fixed to the limb part by a fitting tool, so that a hook part of the claw part is freely movably fitted to the groove part.

Abstract: A compact ink drying apparatus is capable of drying ink ejected to a resin substrate. The ink drying apparatus has a hot air dryer, a hot air supplying part, and an exhausting part. The hot air dryer has a drying furnace, a substrate conveying path formed as a spirally shaped path in the drying furnace, and substrate drying ducts blowing hot air to a surface of a resin substrate on which ink is ejected conveyed along the substrate conveying path to heat ink and exhausting water vapor generated by heating of ink. The hot air supplying part is outside the drying furnace and supplies hot air into the substrate drying ducts, and the exhausting part is outside the drying furnace and exhausts air in the drying furnace through the substrate drying ducts.

Abstract: A head position adjustment mechanism including: a head fixing section for fixedly supporting a head section; a linear-motion mechanism to which the head fixing section has been attached; and a bracket to which the linear-motion mechanism has been attached, the bracket has a tapered pin attached to the bracket and a plunger attached to the bracket, the tapered pin and the plunger facing each other, the tapered pin has its tapered part brought into contact with a first side end of the head fixing section in the X-axis direction, the plunger biases a second side end of the head fixing section in the X-axis direction toward the tapered pin, and moving up and down the tapered pin causes the head fixing section to linearly move in the X-axis direction so that the position of the head fixing section is adjusted.

Abstract: A drying device H is provided with: a heating roller part 10 that guides a printed object X and is capable of heating the rear surface of the printed object X; a hot air blowing part 11 for blowing hot air to the printed surface of the printed object X; a chamber 15 in which the heating roller part 10 and the hot air blowing part 11 are housed; a first plate frame 1 and a second plate frame 2 that are installed on two sides of the chamber 15; a supply-use air blower D1 for supplying air to the hot air blowing part 11; an exhaust-use air blower D2 for exhausting air inside the chamber 15; and a stage 5 on which the supply-use air blower D1 and the exhaust-use air blower D2 are mounted.

Abstract: An inkjet recording apparatus 100 which records on a transferred recording medium X by an inkjet scheme, wherein the inkjet recording apparatus 100 includes guide rolls R for guiding the recording medium X, the recording medium X being negatively charged, recording units 1, 2, 3, and 4 formed of a plurality of recording heads 1a, 2a, 3a, and 4a for spraying ink onto the recording medium X, and a conductive frame unit 11 for supporting the recording heads 1a, 2a, 3a, and 4a, the recording heads 1a, 2a, 3a, and 4a and the conductive frame unit 11 having a continuity relation and the recording heads 1a, 2a, 3a, and 4a being grounded via the conductive frame unit 11.

Abstract: A method for controlling an inkjet printing apparatus performing printing to an elongated printing medium 11, the method having a discharging step of performing continuous application to a piezoelectric element 23 of a nozzle to be used with a pulse number of two or more waves per one printing element to deform the piezoelectric element and thereby discharge ink in an ink chamber 22 from an opening portion 21, and a vibrating step of performing application of the piezoelectric elements 23 to all the nozzles with a pulse number of one wave per one printing element to deform the piezoelectric elements, thereby imparting only vibrations to the inks in the ink chambers 22 without discharging the inks, where the discharging step and the vibrating step are performed alternately.

Abstract: The electro-photographic sheet of paper duplex printing machine includes a sheet supply section, a sheet positioning section which positions sheets and sends out sheets to a backup roller in an electro-photographic printing section, the electro-photographic printing section transfers an image which has been transferred onto the transfer roller onto the sheet, a chain delivery section, a delivery section and a sheet carrying section for turnover. The chain delivery section selectively transfers printed sheets, which has been transferred from the backup roller to the delivery section or sheet carrying section for turnover. The sheet carrying section for turnover supplies one side printed sheet to the sheet positioning section. The sheet fed from the sheet supply section and one side printed sheet fed from the sheet carrying section for turnover are alternately carried to the sheet positioning section and the toner image on the printed sheet is fixed by the fixing device.

Abstract: A method for controlling an inkjet printing apparatus performing printing to an elongated printing medium 11, the method having a discharging step of performing continuous application to a piezoelectric element 23 of a nozzle to be used with a pulse number of two or more waves per one printing element to deform the piezoelectric element and thereby discharge ink in an ink chamber 22 from an opening portion 21, and a vibrating step of performing application of the piezoelectric elements 23 to all the nozzles with a pulse number of one wave per one printing element to deform the piezoelectric elements, thereby imparting only vibrations to the inks in the ink chambers 22 without discharging the inks, where the discharging step and the vibrating step are performed alternately.

Abstract: To provide a printing method capable of inhibiting a paper sheet from being damaged at the time of conveyance and efficiently starting reprinting with high positional accuracy after printing is once stopped. The present invention is directed to a printing method of printing a unit image G by a printing part 2 based on detection of a reference punched hole 41 of a hole detection sensor 4 to form a print portion P1, then stopping printing to form a non-print portion P0, then by a mark detection sensor 3 detecting a register mark G2, recognizing a boundary between the print portion P1 and the non-print portion P0, and reprinting the unit image G from the non-print portion P0 based on detection of the reference punched hole 41 by the hole detection sensor 4.

Abstract: A wet type developing device including a developing roller and an anilox roller, the wet type developing device includes: a dual purpose roller being opposite to the surface of the anilox roller, leaving a gap therebetween, upstream of a region of contact between the surfaces of the anilox roller and the developing roller and being in contact with the surface of the developing roller upstream of the region of contact between the surfaces of the anilox roller and the developing roller and being rotationally driven. A surface part of the dual purpose roller is made of a porous member that has flexibility and elasticity.

Abstract: The electro-photographic sheet of paper duplex printing machine includes a sheet supply section, a sheet positioning section which positions sheets and sends out sheets to a backup roller in an electro-photographic printing section, the electro-photographic printing section transfers an image which has been transferred onto the transfer roller onto the sheet, a chain delivery section, a delivery section and a sheet carrying section for turnover. The chain delivery section selectively transfers printed sheets, which has been transferred from the backup roller to the delivery section or sheet carrying section for turnover. The sheet carrying section for turnover supplies one side printed sheet to the sheet positioning section. The sheet fed from the sheet supply section and one side printed sheet fed from the sheet carrying section for turnover are alternately carried to the sheet positioning section and the toner image on the printed sheet is fixed by the fixing device.

Abstract: A wet type developing device including a developing roller and an anilox roller, the wet type developing device includes: a dual purpose roller being opposite to the surface of the anilox roller, leaving a gap therebetween, upstream of a region of contact between the surfaces of the anilox roller and the developing roller and being in contact with the surface of the developing roller upstream of the region of contact between the surfaces of the anilox roller and the developing roller and being rotationally driven. A surface part of the dual purpose roller is made of a porous member that has flexibility and elasticity.

Abstract: A method for controlling an inkjet printing apparatus performing printing to an elongated printing medium 11, the method having a discharging step of performing continuous application to a piezoelectric element 23 of a nozzle to be used with a pulse number of two or more waves per one printing element to deform the piezoelectric element and thereby discharge ink in an ink chamber 22 from an opening portion 21, and a vibrating step of performing application of the piezoelectric elements 23 to all the nozzles with a pulse number of one wave per one printing element to deform the piezoelectric elements, thereby imparting only vibrations to the inks in the ink chambers 22 without discharging the inks, where the discharging step and the vibrating step are performed alternately.