Ricoh Company, Ltd.

Screen Holdings Co., Ltd.

Ricoh Printing Systems, Ltd.

Shinji Nagayama

Yutaka Nagasawa

Ken Onodera

Genichiroh Kawamichi

Takashi Ebihara

Yasuhide Nakazawa

Tsuyoshi Nagasu

Yuuji Ohmura

Kahei Nakamura

Genichiro Kawamichi

Sadanori Kobashi

Kuraichi Fukaya

A recording medium heating device that can heat and dry a continuous recording medium, includes multiple heating rollers, including respective heaters, disposed on a conveying path of the recording medium; and a controller to control the heaters of the heating rollers. In a starting period during which the recording medium heating device is started, the controller sets temperatures of the heaters to starting temperatures where a temperature of a heating roller positioned closest to an exit side of the conveying path is lower than a temperature of a heating roller positioned away from the exit side of the conveying path.

Recording medium heating device, pretreatment liquid coating/drying apparatus, and printing system

A recording medium heating apparatus includes a plurality of heat rollers disposed in a feeding path of a recording medium and having respective heating units; and a control unit controlling temperatures of the heating units so that the temperature of a first heat roller is lower than the temperature of a second heat roller. Further, the first and the second heat rollers are included in the plurality of heat rollers and the first heat roller is disposed on the upstream side of the second heat roller in the feeding path.

Recording medium heating apparatus and system including the recording medium heating apparatus

A pretreatment liquid application drying device includes a conveying unit configured to convey a continuous recording medium; an application device configured to apply a pretreatment liquid on the recording medium; a heating drying device disposed at a downstream side of the application device in a recording medium conveying direction, including first and second drying units that are connected in a separable manner, the first and second drying units respectively configured to dry one side and the other side of the recording medium; and a cockling suppressing mechanism configured to curve the heated recording medium in the conveying direction, the cockling suppressing mechanism being provided on at least one of an upstream and a downstream side in the conveying direction near the heating drying device. A part of the cockling suppressing mechanism moves in conjunction with a separating and connecting movement of the heating drying device.

Pretreatment liquid application drying device, printing system including the same, and printing device

A sheet transporting apparatus includes: a heating roller and a pressure roller that heats and presses a toner image to fix the toner image onto the sheet; a pressure roller detection unit that detects a contact posture of the rollers; a sheet meander correction mechanism that corrects a meander of the sheet by varying a difference in pressures between the rollers at both ends of the rollers; and a microprocessor that computes and stores the amount of the meander and the amount of correction, wherein the toner is fixed on the sheet when the contact posture is within a fixable range, and wherein when the pressure roller detection unit detects that the contact posture is out of the fixable range during transport of the sheet, the contact posture is controlled to return to a predetermined fixable posture, and the microprocessor corrects an error in the amount of correction.

Sheet transporting apparatus and printing apparatus

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Ibaraki, Japan

Shinji Nagayama