Sharp Kabushiki Kaisha Corporation

Kyohko Matsuda

Makoto Izumi

Yusuke Sakakibara

The invention achieves uniform image quality for every transfer regardless of a moisture content on a surface of a paper sheet when a plurality of transfer processes is to be made on a single paper. A copier (A) is provided with a optical sensor () which includes at least one light source, illuminates a paper sheet (P) with light, receives the light reflected from the paper sheet (P), and measures the received light intensity. Before each of a plurality of transfer processes, the copier (A) calculates a moisture content on a surface of the paper sheet (P) from the light intensity measured by the optical sensor (), and sets a transfer condition of a transfer device () based on the calculated moisture content on the surface of the paper sheet (P).

Image forming device and image forming method

Type and moisture content of a sheet of paper are determined with high accuracy for controlling an image forming condition, accordingly. A coping machine includes a transmitted-light measuring unit, a reflected-light measuring unit, a type determination unit configured to determine a type of a sheet of paper, a moisture content calculation unit configured to calculate a moisture content of the sheet of paper, based on the type of the sheet of paper determined by the type determination unit and the intensity of the light measured by the reflected-light measuring unit, and an image forming condition setting unit configured to set an image forming condition for the sheet of paper.

Growing community of inventors

Sakai, Japan

Kyohko Matsuda