Gloss processing apparatus

摘要

A sheet of paper is set on a paper-supplying portion of a back surface gloss processing apparatus while its top surface is faced upward. A gloss level sensor measures a gloss level of a back surface of the sheet of paper. Data of this measurement is compared with a previously set threshold value. When this measurement result does not exceed the threshold value, it is determined that the gloss processing has not been performed on the back surface thereof. It is then determined whether or not the presently set operation mode is a top surface gloss processing mode. When determining that the present operation mode is not the top surface gloss processing mode, the operation mode is automatically changed from a presently set back surface gloss processing mode to the top surface gloss processing mode.

主权项

1. A gloss processing apparatus comprising:
a gloss processing portion that performs gloss processing on a sheet of paper on which clear toner has been provisionally fixed; a gloss-level-measuring portion for a back surface of the sheet of paper which is an opposite surface of a top surface of the sheet of paper, on which the gloss processing portion performs the gloss processing, the gloss-level-measuring portion measuring a gloss level of the back surface of the sheet of paper, the gloss-level-measuring portion being positioned at an upstream side of the gloss processing portion along a sheet-transferring direction; and a control portion that is configured to select separate gloss processing modes according to a case where the gloss processing is performed on the back surface of the sheet of paper or a case where the gloss processing is not performed on the back surface of the sheet of paper, based on a measurement result of the gloss-level-measuring portion for the back surface of the sheet of paper, wherein the control portion changes its processing mode to the gloss processing mode selected on the base of the measurement result of the gloss-level-measuring portion for the back surface of the sheet of paper when the control portion determines that the gloss processing mode selected on the base of the measurement result of the gloss-level-measuring portion for the back surface of the sheet of paper is different from a previously set gloss processing mode.