Preventing method of offset of toner

Abstract

Abstract PURPOSE:To prevent toner from sticking on a roller surface by impressing a heat fixing roller with a bias potential which has the same polarity with a toner potential. CONSTITUTION:When the fixing roller 7 is impressed during toner heating with the bias potential having the same polarity with unfixed toner through a metallic piece 11, a negative potential is developed at a ''Teflon'' layer 8. Therefore, toner with the negative potential is repelled to prevent the toner from sticking on the surface of the fixing roller 7. Further, even when oil for offsetting is used, the staining of a form and the formation of black stripes due to the oil are prevented.

Inventors

• 👤 Yoshiharu Fujii
• 👤 義晴 藤井

Bibliographic Details