Ricoh Company, Ltd.

Hiroyoshi Matsumoto

Junji Nakai

Masakazu Yoshida

Souichi Nakazawa

Koji Nagai

Tatsuro Watanabe

Hiroyuki Hiratsuka

Toshitaka Osanai

Tohru Ohshima

A maintenance method and a liquid discharge apparatus. The maintenance method is performed by a liquid discharge apparatus including a first liquid discharge head to discharge ink, a second liquid discharge head to discharge pretreatment liquid, and a liquid receiver into which the ink and the pretreatment liquid are discharged, and the maintenance method includes flushing the ink and the pretreatment liquid into the liquid receiver, the flushing including discharging the ink into the liquid receiver and then discharging the pretreatment liquid into the liquid receiver. The liquid discharge apparatus includes the first liquid discharge head, the second liquid discharge head, the liquid receiver, and a controller to control the first liquid discharge head and the second liquid discharge head to discharge the pretreatment liquid onto a print medium and then discharge the ink onto the print medium.

Maintenance method and liquid discharge apparatus

A printer includes: a liquid discharger configured to discharge a liquid onto a print target; a carriage configured to move the liquid discharger in a main scanning direction; a holder configured to hold the print target and relatively move the print target in a sub-scanning direction orthogonal to the main scanning direction to cause the print target to face the liquid discharger; and multiple height detectors at different positions in the sub-scanning direction, the multiple height detectors configured to detect the print target on the holder.

Printer

A cloth heating apparatus includes a body, a receiver, a cloth holder, and a heater. The receiver is disposed in the body. The cloth holder is removably attached to the receiver, to hold a cloth. The heater is disposed in the body, to heat the cloth. The cloth holder is removably attachable to a printing apparatus to print an image on the cloth, with the cloth held on the cloth holder.

Cloth heating apparatus, cloth heating method, method of applying image to cloth, medium heating apparatus

According to an aspect of the present invention, a printing apparatus includes a plasma treatment unit configured to acidify at least a surface of a print medium by applying plasma treatment to the surface of the print medium, a first primer applying unit configured to apply primer treatment by applying treatment liquid to the surface of the print medium having undergone the plasma treatment, and a first recording unit configured to perform recording by inkjet recording on the print medium having undergone the primer treatment.

Printing system, printing apparatus, and printed-matter production method

A printing apparatus includes a plasma treatment unit that performs plasma treatment on a surface of a treatment object to acidify at least the surface of the treatment object; and a recording unit that performs inkjet recording on the surface of the plasma treatment subjected to the plasma treatment by the plasma treatment unit.

Printing apparatus and printed material manufacturing method

A treatment-target modification device is configured to modify a treatment target being conveyed, with discharge. The treatment-target modification device includes: a hydrophilization unit configured to perform hydrophilization treatment on the treatment target (; and a measurement unit configured to measure two-dimensional distribution of a reflectance spectrum of light reflected from the hydrophilization-treated treatment target.

Treatment-target modification device, treatment-target modification system, image forming system, and image forming method

A printing apparatus includes a plasma processor, a recording unit, and a heating unit. The plasma processor performs plasma processing on a processing target matter. The recording unit discharges ink and records dots onto the processing target matter on which the plasma processing has been performed. The heating unit heats an ink discharge region of the processing target matter.

Printing apparatus, printing system, and printing method

A processing object modifying apparatus includes a conveying unit that conveys a processing object; a plasma processing unit that performs plasma processing onto a surface of the processing object while the processing object is being conveyed by the conveying unit; a measuring unit that measures a pH value of the processing object to which the plasma processing has been applied; and a controlling unit that controls the conveying unit to change a conveying speed of the processing object on the basis of a measurement result of the measuring unit, the processing object to which the plasma processing is being applied.

Processing object modifying apparatus, printing apparatus, printing system, and method for manufacturing printout

A plasma processing device includes a plasma processing unit that performs plasma processing on a predetermined area on a target recording medium at least two times; and a control unit that sets a plasma energy amount used by the plasma processing unit to perform a first plasma processing on the predetermined area of the target recording medium as a first energy amount and sets a plasma energy amount used by the plasma processing unit to perform a second plasma processing on the predetermined area as a second energy amount smaller than the first energy amount.

Plasma processing device, printing apparatus, printing system, computer program product, and method for manufacturing printed material

A printing apparatus includes: a plasma processing unit that performs plasma processing on a processing target surface side of a processing object; a recording unit that ejects ink on the processing target surface side of the processing object; an acquiring unit that acquires setting information, in which an adjustment target area for adjusting surface roughness and surface roughness of the adjustment target area on a surface of an ink layer formed with the ink are set; and a plasma control unit that controls the plasma processing unit to perform plasma processing on a processing area corresponding to the adjustment target area, on the processing target surface side of the processing object, with an amount of plasma energy for obtaining the set surface roughness on the surface of the ink layer formed on the processing area.

Printing apparatus, printing system, and printed material manufacturing method

A printing apparatus includes an acidification treatment unit that acidifies at least a surface of a treatment object by irradiating the treatment object with plasma; an inkjet recording unit that records to the treatment object having been acidified by the acidification pretreatment unit in an inkjet recording system; and a control unit that specifies an ink to be used by the inkjet recording unit from at least two types of inks having different properties, based on the type of the treatment object and an amount of plasma energy used in a plasma treatment performed by the acidification treatment unit or based on a pH value of the surface of the treatment object.

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Kanagawa, Japan

Hiroyoshi Matsumoto