Riso Kagaku Corporation

Hirokazu Yabune

Hideaki Inoue

Masashi Hara

Masatoshi Fujimoto

Ryo Terakado

Akihiro Yamagata

Yoshihiro Hanamoto

Masaaski Saitou

A printing apparatus includes: a printing section; a print conveyor conveying a medium in the printing section; a constant-speed conveyor conveying the medium at a variable constant conveying speed in a circulation route for duplex printing; a registration roller pair against which the medium to be conveyed to the printing section is caused to abut; and a processor determining a conveyance schedule for the medium based on at least one of a first conveyance route length between a downstream end portion in a conveying direction of the print conveyor and an upstream end portion in the conveying direction of the constant-speed conveyor and a second conveyance route length between a downstream end portion in the conveying direction of the constant-speed conveyor and the registration roller pair, and a medium length in the conveying direction of the medium.

Printing apparatus

A printing system, including a first printing part, a second printing part that is disposed downstream of the first printing part in the conveying direction of a medium, and a conveyance mechanism that conveys the medium The conveyance mechanism includes a passage detection sensor, a conveyor roller, and a resist roller that is disposed downstream in the conveying direction from the passage detection sensor and the conveyor roller, that is butted by the medium, and that conveys the medium slackened due to the butting. The printing system further includes a controller configured to control the conveyor roller so that the slack amount of the subsequent medium is constant based on the conveyance status of the preceding medium and the detection time of the leading edge of the subsequent medium detected by the passage detection sensor.

Printing system

A printing apparatus includes: a sheet discharge tray having an upstream portion tilted to extend downward in a direction of gravity; an upper member limiting a height of a space above the sheet discharge tray; a full sensor configured to detect an upstream end of a top sheet of sheets stacked on the sheet discharge tray; a counter configured to count a number of the sheets discharged onto the sheet discharge tray; and a controller. The controller determines whether to stop discharging of the sheets to the sheet discharge tray, based on a detection result of the full sensor upon the sheets to be stacked on the sheet discharge tray including only sheets each with uniform thickness and based on a count value of the counter upon the sheets to be stacked on the sheet discharge tray including a sheet with thickness varying partly.

Printing apparatus capable of performing printing on partially-thick sheets

A print system includes a first printer which performs printing on a sheet while conveying the sheet and a second printer which receives the sheet conveyed from the first printer and performs printing on the sheet while conveying the sheet. The second printer includes a second printing unit, a second registration roller, a second pre-registration roller, a sheet detector, and a second controller. The second controller controls an operation of the second pre-registration roller and an operation of the second registration roller based on a timing of a detection of the sheet by the sheet detector.

Print system including multiple printers

A conveyance control device controls conveyance of a plurality of sheets including an image-formed sheet. The conveyance control device includes an obtaining unit configured to obtain display image data indicating a display image of each of the plurality of sheets; a region-specifying unit configured to specify common color regions having a common display color on the plurality of sheets based on the display image data; and a multiple feed detector configured to detect multiple feed of the sheets based on a light-receiving amount of light irradiated onto the common color regions; wherein the display image data indicating a display image of the image-formed sheet includes predetermined image data indicating a predetermined image to be previously formed and sheet image data indicating a sheet image displayed in a sheet color of the sheet.

Conveyance control device

A sealing system for creating a sealed letter by use of an envelope sheet with a bond part on a basis of a sealing setting. The sealing system includes a transmission amount detector configured to detect an amount of transmission of the envelope sheet being conveyed on a conveyance path, a bond position calculator configured to calculate a first bond position where the bond part exists in the envelope sheet on a basis of the amount of transmission as detected by the transmission amount detector, and a judgment unit configured to judge whether the envelope sheet is conveyed a correct way round in a conveyance direction of the envelope sheet, from the first bond position as calculated by the bond position calculator and a second bond position based on the sealing setting.

Sealing system for creating sealed letter by use of envelope sheet with bond part

A printer includes a printing unit configured to print on a print medium while transferring the print medium by a first transfer section, a transfer unit located downstream the printing unit in a transfer route and configured to transfer the print medium by a second transfer section, and a controller configured to control the printing unit and the transfer unit. The controller is configured to stop the first transfer section prior to the second transfer section upon detection of a jam of the print medium.

Printer capable of resolving a jam of a print medium

An image forming device including a pickup roller and a scraper roller configured to send out a print sheet to a feed route, a before-registration roller configured to send out a print sheet to a registration roller, and a control unit configured to independently control the transfer speed of the print sheet at each point based on operation patterns relating to the pickup roller and the scraper roller, and an intermediate transfer roller configured to transfer the print sheet between the before-registration roller and itself, wherein the operation pattern is set based on a relationship between a distance from the intermediate transfer roller to the before-registration roller or a distance from the intermediate transfer roller to the registration roller and a length of the print sheet.

Growing community of inventors

Ibaraki, Japan

Hirokazu Yabune