Abstract: Provided are a liquid jetting head and a liquid jetting device that prevent contamination of a humidity sensor. The liquid jetting head and the liquid jetting device include a nozzle that jets a liquid; a humidity sensor that is disposed further inside than the nozzle face where the nozzle is disposed; an air intake port that is disposed on the same plane as the nozzle face; a connection passage that allows the air intake port and the humidity sensor to communicate with each other; and a contamination preventing part that prevents contamination of the humidity sensor.
Abstract: An image forming apparatus includes a moving unit and a lifting and lowering mechanism. The moving unit is supported by a casing in an upwardly and downwardly moving manner. A fixed pully and a winding pully are provided in the casing. A movable pulley is provided in the moving unit. A wire is configured to be wound around the fixed pulley and the movable pulley. One end of the wire is fixed to the casing and the other end of the wire is fixed to the winding pulley. A rack is provided in the casing along an upper-and-lower direction. A pinion is provided in the moving unit and configured to be engaged with the rack. The winding pulley is rotated to wind and unwind the wire via the fixed pulley and the movable pulley, and the moving unit is lifted and lowered while the pinion being engaged with the rack.
Abstract: A liquid circulation device includes a first liquid discharge head to discharge a liquid, a first supply channel to supply the liquid to the first liquid discharge head, a first collection channel to collect the liquid from the first liquid discharge head, a second liquid discharge head to discharge the liquid and disposed higher than the first liquid discharge head, a second supply channel to supply the liquid to the second liquid discharge head, a second collection channel to collect the liquid from the second liquid discharge head, a supply-side fluid restrictor disposed in the first supply channel to make a fluid resistance value of the first supply channel greater than a fluid resistance value of the second supply channel, and a collection-side fluid restrictor disposed in the second collection channel to make a fluid resistance value of the second collection channel greater than a fluid resistance value of the first collection channel.
Abstract: An image forming apparatus includes a head unit, a conveyance unit, a lifting and lowering mechanism, a drive source and a transmission mechanism. The head unit is provided with an inkjet head having a discharge opening through which an ink is discharged. The conveyance unit is supported in an upwardly and downwardly movable manner in directions close to and apart from the head unit from a lower side. The lifting and lowering mechanism is configured to lift and lower the conveyance unit. The drive source is configured to drive the lifting and lowering mechanism. The transmission mechanism is configured to transmit driving force from the drive source to the lifting and lowering mechanism. The transmission mechanism includes a warm gear, a warm wheel meshed with the warm gear and a resistance applying member configured to apply resistance to rotation of the warm gear.
Abstract: An inkjet printing apparatus includes an ink jetting unit to jet ink to a substrate, a stage to movably support the substrate relative to the ink jetting unit, and a pair of air-conditioning units arranged at front and rear ends of the ink jetting unit in a direction in which the stage is moved, the air-conditioning units each including an air blowing unit and a suction unit.
Abstract: An inkjet printing apparatus includes a print head ejecting ink, a tank reserving ink to be supplied to the print head; and a joint unit being capable of connecting the print head and the tank to each other. The inkjet printing apparatus further includes a detecting unit detecting a position of the joint unit, which is moved by a drive source, with respect to the print head.
Abstract: An image forming apparatus including a polygon mirror that deflects a light beam, the image forming apparatus includes: an optical sensor arranged such that the light beam deflected by the polygon mirror enters the optical sensor; and a hardware processor that measures an output level of the optical sensor and calculates, as a remaining life of the polygon mirror, an operation time of the polygon mirror to when the output level becomes a threshold value in a case of assuming that the output level ongoingly changes at a rate of change over time that is a change amount of the output level per unit operation time of the polygon mirror, using the measured output level.
Abstract: A liquid discharge apparatus includes a liquid discharge device, circuitry, and a curing device. The liquid discharge device is configured to discharge a liquid having a curing degree variable by a stimulation amount while relatively moving to a recording medium. The circuitry is configured to acquire surface roughness information indicating glossiness of a formed object formed on the recording medium and set a stimulation amount for the liquid based on the surface roughness information. The curing device is configured to stimulate the liquid discharged by the liquid discharge device based on the stimulation amount set by the circuitry to cure the liquid. The circuitry is configured to set, based on the surface roughness information, the stimulation amount for each region stimulated by the curing device in a same plane of the formed object.
March 19, 2019
Date of Patent:
September 22, 2020
Ricoh Company, Ltd.
Aya Yamasawa, Manabu Arita, Toshihito Kamei, Shinichi Hatanaka
Abstract: A meandering control device includes: a detector configured to detect a position of an edge of a web being conveyed in a width direction of the web; a corrector configured to correct a position of the web being conveyed in the width direction; and a controller including a digital filter configured to perform filtering on a position signal indicating the position of the edge detected by the detector to attenuate a noise component. The controller is configured to drive the corrector to correct the position of the web in the width direction based on the position signal after the filtering.
Abstract: An inkjet printing device includes an ink container accommodating a non-aqueous clear ink containing a resin and an organic solvent, a discharging head to discharge the non-aqueous clear ink directly or indirectly onto a substrate to form printed matter; and a heating device to heat the substrate, wherein the following relationship is satisfied: Tlow (° C.)>Thigh (° C.), where Tlow represents the temperature of the substrate that the heating device is heating during printing in a low gloss printing mode in which the non-aqueous clear ink is directly or indirectly discharged and attached to the substrate to impart low gloss to the printed matter and Thigh represents the temperature of the substrate that the heating device is heating during printing in a high gloss printing mode in which the non-aqueous clear ink is directly or indirectly discharged and attached to the substrate to impart high gloss to the printed matter.
Abstract: A liquid cartridge configured to be inserted into a cartridge-attachment section in an insertion direction includes a casing, and a lever supported by the casing. The lever is pivotable about a pivot axis between a first position and a second position. The lever includes a light-blocking portion configured to block or attenuate light traveling in a widthwise direction crossing the insertion direction and a gravitational direction, and a force-receiving portion positioned closer to a front wall of the casing than the light-blocking portion is to the front wall in the insertion direction. The light-blocking portion is positioned lower at the second position than at the first position. The pivot axis is positioned frontward of the light-blocking portion and rearward of the force-receiving portion in the insertion direction. The lever pivots from the second position to the first position upon application of an external force to the force-receiving portion.
Abstract: A coating apparatus is connectable to both an image forming apparatus and a sheet feeder. The coating apparatus includes a coater, a carry-in entrance, and an ejector. The coater coats a recording medium with a treatment liquid. The carry-in entrance is on one of two exterior wall surfaces facing each other. The recording medium is conveyed from the sheet feeder through the carry-in entrance. The ejector is on another of the two exterior wall surfaces. The ejector ejects the recording medium to the image forming apparatus. A position of the carry-in entrance on the one of the exterior wall surfaces matches a position of the ejector on said another of the exterior wall surfaces.
Abstract: A printing apparatus, which uses a printhead including a circuit configured to inspect an ink discharge status of a selected nozzle using a temperature detection element, causes the printhead to inspect the ink discharge status by changing a threshold value for judging a detection result of the temperature detection element, in order to judge the ink discharge status in a state in which a heater in the selected nozzle is driven by each of a first pulse and a second pulse whose waveform is different from that of the first pulse, obtains first information about a change point where a judgment result obtained by the first pulse changes, and second information about a change point where a judgment result obtained by the second pulse changes, and sets the threshold value based on the first and second information.
March 22, 2019
Date of Patent:
September 8, 2020
Canon Kabushiki Kaisha
Yuhei Oikawa, Toshiyuki Chikuma, Yutaka Kano, Kohei Sato
Abstract: An inkjet printing apparatus that performs printing by ejecting ink from an ink jet head onto a print medium includes a drying unit for drying a liquid which is contained in the print medium, a table on which the print medium is placed; and a gas flow generating unit for generating a gas flow in a space which is formed between the table and a surface of the print medium toward the side of the table.
Abstract: A liquid discharge head includes a plurality of nozzles to discharge a liquid, a plurality of pressure chambers communicating with the plurality of nozzles, respectively, a plurality of individual supply channels communicating with the plurality of pressure chambers, respectively, a plurality of common-supply branch channels each having a side face and a bottom face and communicating with two or more of the plurality of individual supply channels, respectively, and a common-supply main channel communicating with the plurality of common-supply branch channels. The plurality of common-supply branch channels includes a curved portion on a corner between the side face and the bottom face of each of the plurality of common-supply branch channels along a direction of liquid flow in the plurality of common-supply branch channels.
Abstract: A method determines wearing of a printing apparatus. The method includes: controlling a motor of a label paper driving mechanism of the printing apparatus using motor control data; determining a label start indicator; determining a label end indicator; determining a label length indicator corresponding to a length covered by a rotation of the label paper driving mechanism of an unweared printing apparatus between the label start indicator and the label end indicator based on the motor control data; storing the label length indicator; and determining a wearing indicator of the printing apparatus based on stored label length indicators, including the label length indicator.
August 23, 2019
Date of Patent:
September 1, 2020
BIZERBA SE & CO. KG
Jochen Mueller, Urs-Michael Schaudt, Gerd Kammerer, Helmut Pfau, Markus Uber
Abstract: A liquid ejection head includes a manifold configured to store liquid therein, a plurality of ejection channels, and a dummy channel. Each ejection channel communicates with the manifold and is configured to receive liquid from the manifold and eject liquid through a corresponding nozzle thereof open to a nozzle surface. The dummy channel communicates with the manifold and includes a dummy nozzle open to the nozzle surface. The dummy channel further includes a pressure chamber, an actuator configured to apply pressure to liquid in the pressure chamber, a communication passage connecting the manifold to the pressure chamber, and a circulation passage through which the pressure chamber communicates with the manifold. The circulation passage is different from the communication passage and located between the dummy nozzle and the manifold.
Abstract: A printing apparatus includes: a printer head that prints, in accordance with a movement of the printing apparatus by a user within a printing region of a printing medium, a print-target image on the printing medium; a plurality of sensors each capable of sensing a displacement of the printing apparatus; and a processor that determines, based on the displacement sensed by the sensor, a position of the printing apparatus relative to the printing region, and switches, among the plurality of sensors, a sensing state of a sensor that is sensing the displacement and a sensing state of a sensor that is not sensing the displacement, in accordance with the determined position of the printing apparatus.
Abstract: There is provided a printing apparatus including: a conveyer; a platen configured to support the a medium; a head; a carriage; a sensor configured to detect the medium supported by the platen; a liquid receiver; and a controller. The controller is configured to execute flushing, in which liquid is discharged from nozzles to the liquid receiver, after executing printing in a certain printing pass, which is executed before a last printing pass for printing on a certain medium and during which the carriage moves in a first direction. The controller is configured not to execute the flushing at timing between the last printing pass for the printing on the certain medium and a first printing pass for printing on the next medium.
Abstract: A tension controller includes a drive device configured to rotate a drive shaft, and a drive transmission device configured to transmit a rotation driving force of the drive shaft of the drive device to rotate a rotary shaft of a roll of a conveyance target medium. The drive transmission device including a tension applying device including a variable speed reducing device and a torque limiter, the variable speed reducing device and the torque limiter being disposed between the drive shaft of the drive device and the rotary shaft of the roll of the conveyance target medium. The variable speed reducing device of the tension applying device being configured to change a speed reduction ratio between the rotary shaft of the roll of the conveyance target medium and the torque limiter and to apply a tension force to the conveyance target medium.