Abstract: A liquid circulation device comprises a booster pump that draws liquid from a liquid replenishing tank to supply it to a liquid discharge head; a pressure reducing pump that collects the liquid from the liquid discharge head to supply it to the liquid replenishing tank; a buffer tank connected between the liquid discharge head and the booster pump and between the liquid discharge head and the pressure reducing pump, and into which the liquid flows; a pressure sensor that detects pressure in the buffer tank; and a processor that controls driving voltages of the booster pump and the pressure reducing pump based on a nozzle surface pressure of the liquid discharge head calculated based on pressure data detected by the pressure sensor, and determines whether the liquid is deficient based on the nozzle surface pressure, the driving voltages of the booster pump and the pressure reducing pump.
Abstract: A printing apparatus, including a conveyor, a liquid ejection head with nozzles, a contact part to contact a surface of a recording medium and a controller, is provided. The controller executes printing processes including a first printing process with a first conveying action and a second printing process with a second conveying action. The controller obtains a length of a non-printing region in the recording medium, and in the second printing process, designates a nozzle within a contact range, in which the recording medium is maintained contacted by the contact part upon completion of the conveying action in a final printing process, to be a second nozzle, which is activated to print a most downstream part of the image. The longer the length of the non-printing region is, the closer nozzle closer to an upstream end of conveyance among the plurality of nozzles is designated to be the second nozzle.
Abstract: An ink-jet printing device according to the present invention includes at least one nozzle configured to discharge an ink droplet onto a recording medium conveyed in a conveyance direction, and a control unit to control flushing operation of the nozzle. Candidate regions are disposed at a plurality of places separated from each other in a conveyance direction of a cut sheet. The control unit controls the nozzle to perform the flushing operation in the candidate regions at a plurality of places in the conveyance direction of the cut sheet. With this configuration, the ink jet printing device can efficiently perform the flushing operation on a recording medium with reduced restriction on imposition.
Abstract: A method of processing data from an electromagnetic resistivity logging tool which includes a transmitter coil and a receiver coil is disclosed. The electromagnetic resistivity logging tool is placed at a desired location. The transmitter coil and the receiver coil are positioned at a first azimuthal angle. A signal is transmitted from the receiver coil. The receiver coil then receives a signal. The signal at the receiver coil, a tilt angle of the transmitter coil, a tilt angle of the receiver coil and the first azimuthal angle are then used to calculate a first complex voltage representing at least one component of the received signal.
Abstract: An ink jet recording method includes, in order, a jetting step of jetting an ink including an organic solvent, an oligomer having an ethylenically unsaturated group, and a pigment, and not including a polymerization initiator or including a polymerization initiator at a content of more than 0% by mass and 0.1% by mass or less onto a base material using an ink jet head, a drying step of drying the ink by removing at least a part of the organic solvent in the jetted ink, and a curing step of curing the dried ink with an electron beam.
Abstract: A direct-to-object printer includes a sliding arm that carries a plurality of printheads over a planar member for the printing of objects on the planar member and that rotates the plurality of printheads after the printheads have passed over the planar member. The printer then moves the sliding arm in the opposite direction over the planar member to print a different portion of the objects on the planar member while maintaining the same order of the printheads.
Abstract: A decurling device includes a decurler. The decurler includes a first dryer roller, a second dryer roller, and a heat source. The heat source is disposed at the first dryer roller to heat the first dryer roller. The first dryer roller and the second dryer roller rotate while holding a sheet therebetween to convey the sheet.
Abstract: An ink jet recording apparatus includes: an image forming unit for forming an ink image containing a liquid component and a coloring material on a moving ink receiving medium; and a liquid absorbing unit having a liquid absorbing member which absorbs at least a part of the liquid component from the ink image by coming into contact with the ink image on the ink receiving medium, in which, in a moving direction of the ink receiving medium, a curvature radius R1 of the ink receiving medium at a contact start position between the liquid absorbing member and the ink image and a curvature radius R2 of the liquid absorbing member at the contact start position satisfy a relationship in which R1>0, R2<0, and |R1|?|R2|.
June 28, 2018
Date of Patent:
April 28, 2020
Canon Kabushiki Kaisha
Keiichirou Takeuchi, Koji Inoue, Akihiro Mouri, Toru Ohnishi
Abstract: A printing apparatus includes a plurality of belt rollers that rotate, a direction in which a rotation axis of each belt rollers extends being a width direction that intersects a transport direction of a medium; a transporting belt that, while wound across the plurality of belt rollers, rotate to transport the medium in the transport direction; a print head that performs printing on the medium transported by the transporting belt; and a control unit that rotates the transporting belt while in a state in which an unrotated state of the transporting belt has continued for a predetermined period. When a rotation position of the transporting belt after application of power and before rotating the transporting belt is referred to as an initial rotation position, in a case in which a rotation of the transporting belt is to be stopped, the control unit stops the transporting belt at a rotation position that is different from the initial rotation position.
Abstract: A method of operating a drop-on demand (DOD) jetting device having a nozzle, a pressure chamber filled with a liquid and connected to the nozzle and an actuator energized by a drive signal, wherein a periodic DOD signal determines whether or not a droplet is jetted out from the nozzle in a given DOD period, and the drive signal has a waveform configured to cause the actuator to excite a pressure wave in the liquid, the method further comprising the steps of a) energizing the actuator with a waveform that has a fixed pattern and extends over a time interval that is longer than the given DOD period; and b) ignoring the DOD signal in at least the first DOD period that follows after said period for which the step a) has been performed.
July 3, 2018
Date of Patent:
April 7, 2020
CANON PRODUCTION PRINTING HOLDING B.V.
Cornelis W. M. Venner, Johannes M. M. Simons
Abstract: A liquid ejecting apparatus includes a liquid ejecting head which performs a printing by ejecting liquid onto a medium from a nozzle, a wiping portion which wipes the liquid ejecting head by moving relative to the liquid ejecting head, a maintenance unit which performs a maintenance to forcibly discharge the liquid from the nozzle, and a preprocessing device which performs a preprocessing on the medium before the printing is performed, in which when the wiping portion and the liquid ejecting head are separated from each other in the wiping not accompanying the maintenance, the wiping portion is displaced in a direction away from the preprocessing device.
Abstract: [Problem to be Solved] To provide a tablet printing apparatus that can prevent drying of ink on the tip end of each nozzle of an inkjet printing mechanism, when a tablet does not arrive at a print position. [Solution] A tablet printing apparatus includes: conveyor mechanism 17 that conveys sequentially fed tablets by moving a conveyor belt 171; an inkjet printing mechanism that performs printing on a tablet in a print position; a suction mechanism 174a that holds a tablet on the surface of the conveyor belt in a predetermined area including at least the print position by sucking in air; determination means (S15) that determines whether a tablet arrives at the print position; and head retreat means (32, S21) that retreats an inkjet head 31 such that a tip end part of each of the nozzles of the inkjet printing mechanism goes away from the surface of the conveyor belt, when it is determined that a tablet does not arrive at the print position.
Abstract: Automatic sheet feeding of an installed roll is performed more reliably. To this end, a leading end of a sheet is detected on the basis of a change in an output value of a sensor while causing a roll to rotate in a winding direction using a sensor capable of detecting a distance to the sheet separated from the roll. After the detection, the roll is caused to rotate in a feeding direction, and a feeding state of the sheet is determined on the basis of a change in the output value of the sensor.
Abstract: An indirect printing system is disclosed having an intermediate transfer member (ITM) in the form of an endless belt that circulates during operation to transport ink images from an image forming station. Ink images are deposited on an outer surface of the ITM by one or a plurality of print bars. At an impression station, the ink images are transferred from the outer surface of the ITM onto a printing substrate. In some embodiments, the outer surface of the ITM 20 is maintained within the image forming station at a predetermined distance from the one or each of the print bars 10, 12, 14 and 16 by means of a plurality of support rollers 11, 13, 15, 17 that have a common flat tangential plane and contact the inner surface of the ITM.
March 20, 2016
Date of Patent:
March 24, 2020
LANDA CORPORATION LTD.
Benzion Landa, Aharon Shmaiser, Alon Siman-Tov, Alon Levy
Abstract: An inkjet recording apparatus that the throughput until a start of a recording operation in the structure in which an ink is circulated between a recording head and an ink tank includes the recording head which discharges the ink to perform a recording operation, the ink tank which stores the ink, and a buffer chamber having a volume which is changed according to a pressure. When the inkjet recording apparatus is changed from a circulation state in which a supply pump and a collection pump are driven to circulate the ink between the recording head and the ink tank to a pause state in which the driving of the supply pump and the collection pump is stopped to stop the circulation of the ink, a negative pressure due to a change in the volume of the buffer chamber is maintained.
Abstract: The present disclosure provides a calibration method and a calibration device for a volume of an ink droplet and a printing apparatus including the calibration device. The calibration method for a volume of an ink droplet comprises: calculating a first volume of a single ink droplet based on a mass and a density of an ink droplet; calibrating a measurement parameter used in an optical measurement approach based on the first volume; and acquiring a second volume of a single ink droplet using the optical measurement approach based on the calibrated measurement parameter.
Abstract: Disclosed is an ink jet recording apparatus including an image forming unit that forms a first image including a first liquid and a coloring material on an ink receiving medium; and a liquid absorbing member that includes a porous body which is configured to be brought into contact with the first image so as to absorb at least a portion of the first liquid from the first image, in which an average pore diameter of a first surface of the porous body which is configured to be brought into contact with the first image is equal to or smaller than 0.6 ?m, an arithmetic average roughness Ra defined by JIS B 0601:2001 of the first surface of the porous body is equal to or smaller than 1.9 ?m, an average pore diameter of a second surface, which is a back surface of the first surface, of the porous body is larger than the average pore diameter of the first surface, and a Gurley value defined by JIS P 8117 of the porous body is equal to or shorter than 10 seconds.
Abstract: A printing apparatus configured to print an image on a medium includes a head having a first nozzle group configured to discharge a first liquid onto a medium, and a second nozzle group configured to discharge a second liquid acting on the first liquid, a main scanning unit configured to move the head in a main scanning direction, a sub scanning unit configured to move the medium in a sub scanning direction, and a control section configured to control discharging of the first liquid and discharging of the second liquid, and in the printing apparatus, the second nozzle group includes an upstream unit disposed on an upstream side of the first nozzle group in the sub scanning direction, and an overlapping unit located on a downstream side of the upstream unit in the sub scanning direction and disposed to overlap with at least a portion of the first nozzle group as viewed in the main scanning direction, the control section determines, based on liquid volume of the first liquid to be discharged, liquid volume of t
Abstract: An inkjet printing device includes a fast-scan drive module, attached to a first gantry, for moving back-and-forth, parallel to a first direction above a flatbed table, a print head including a nozzle row, wherein the first direction is perpendicular to the nozzle row; and a slow-scan drive module, attached to the inkjet printing device, for moving back-and-forth above the flatbed table, parallel to a second direction, the first gantry on a set of motion rails, attached to the inkjet printing device, wherein the second direction is perpendicular to the first direction; and a first drive module, attached to a second gantry, for moving parallel to the second direction the second gantry on the set of motion rails while an ink-receiver is coupled to the second gantry; and loading the ink-receiver on the flatbed table by decoupling the ink-receiver from the second gantry.
Abstract: A printer includes a holder configured to house rolled recording paper, a cover that is attached to the holder to be openable and closable relative to the holder, and a contact part that is attached to the cover and configured to contact the recording paper. The contact part is configured such that the contact part substantially point-contacts the recording paper, and positions on the contact part contacting the recording paper change as the recording paper is unrolled.