Recording paper conveyance controller for fixation part

Abstract

Abstract PURPOSE:To obtain recording paper free of folding, ruck, and picture disorder by detecting the extent of slanting feed of recording paper at a fixation part and controlling the driving of a fixing roller. CONSTITUTION:When recording paper 4 is fed slantingly, a sensor 11 detects the left corner of the recording paper 4 to generate an output (a). Then, a sensor 12 detects the right corner of the recording paper 4 with some time lag to generate an output (b). The output (c) of a phase comparing circuit 15 is turned on by the width of this timing difference t1. This output signal (c) is inputted to an arithmetic circuit 16 and during this period, a fixing roller 3 is stopped. Simultaneously, the slanting feed is corrected and the off time is so set that the extent of flection is not excessive. As the paper size increases, the off time of an output for driving the fixing roller is extended. Therefore, the trouble of the slanting feed is not caused and an unfixed picture is not disordered.

Inventors

• 👤 Harumi Takahashi
• 👤 高橋　晴美
• 👤 Hiroyuki Idenawa
• 👤 弘行 出縄
• 👤 Hideya Furuta
• 👤 古田　秀哉

Bibliographic Details