Riso Kagaku Corporation | Date: 2015-05-22
A printer includes an expendable supply, a detector that detects at least one of a power-on operation, a resume from an energy-saving mode and a new installation of an expendable supply, a determiner that determines whether or not a recommended limit of the expendable supply has passed, a warning generator that generates a warning for notifying that a usable limit of the expendable supply will come soon if the recommended limit has already passed, and a memory storage that stores a warning cycle and a last warning generation. When the recommended limit has passed and the power-on operation, the resume or the new installation is detected, the warning generator generates a warning  when the last warning generation is not stored in the memory storage, or  when the last warning generation is stored in the memory storage and the warning cycle has elapsed from the last warning generation.
Riso Kagaku Corporation | Date: 2015-04-22
When a face of a paper sheet to be discharged on which an image is formed faces downward, a paper discharge device divides an image region of image data on the paper sheet to be discharged into areas along a discharge direction, detects an area in which maximum image density for each divided area is higher than or equal to a specified threshold, and controls a discharge angle so that the detected area does not come into contact with a stacked paper sheet until the paper sheet to be discharged has been discharged from a discharge roller.
Riso Kagaku Corporation | Date: 2015-03-05
A paper discharge device including discharge rollers that discharge a paper sheet and a paper discharge tray on which discharged paper sheets are stacked further includes a control unit that controls the discharge angle of a paper sheet according to at least the stacked amount of paper sheets that are stacked on the paper discharge tray so that the position at which the front end of a paper sheet to be discharged begins to come into contact with the stacked paper sheets on the paper discharge tray is within a specified range from the front end of the stacked paper sheets.
Riso Kagaku Corporation | Date: 2015-02-10
An inkjet printer includes a transfer unit that transfers a paper, a print unit that has three or more nozzle rows aligned along a transfer direction of the paper, and a controller that ejects ink on the paper by controlling the print unit while transferring the paper by controlling the transfer unit. The most-upstream nozzle row of the nozzle row and the most-downstream nozzle row are capable of ejecting ink whose color has a lowest brightness among colors of ink to be used for printing. The controller selects the most-upstream nozzle row or the most-downstream nozzle row as a nozzle row for ejecting the ink whose color has a lowest brightness according to a type of the paper. According to the printer, it becomes possible to restrict contaminations on a printed media while also restricting degradation of print quality.
Riso Kagaku Corporation | Date: 2015-03-04
An image processing apparatus calculates a first data amount that is a data amount per page of a print job, and extracts images having a resolution that exceeds a printing resolution from among images included in the print job when the first data amount is greater than a threshold value. The image processing apparatus converts the resolution of the extracted images into the printing resolution, and calculates a second data amount that is a data amount per page of the print job after conversion into the printing resolution. The image processing apparatus causes a user to select an element from among printing speed and image quality when the second data amount is greater than a threshold value. The image processing apparatus reduces the resolutions of the images included in the print job when the selected element is the printing speed.