Image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsSatoshi Nishida, Kohei Okayasu
Life of this patent
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Abstract
An image forming apparatus forms an unfixed toner image on a sheet and includes a fixing unit including a fixing roller, a back-up member forming a nip with the fixing roller, and a rotatable heater contactable to and heating the fixing roller. The sheet is output from the apparatus after the unfixed toner image is fixed on the sheet. In a cleaning mode for cleaning the fixing unit, a predetermined unfixed toner image is formed on the sheet, the sheet is fed to the fixing unit, the toner is transferred from the sheet onto the fixing roller in the fixing nip, the toner transferred onto the fixing roller is brought into contact to the heating member, and thereafter, the toner on the fixing roller is transferred onto the sheet in the fixing nip.
Claims15
An image forming apparatus for forming a toner image on a sheet, said image forming apparatus comprising:
- a fixing unit including a fixing roller, a back-up member configured to cooperate with said fixing roller to form a nip therebetween, and a rotatable heating member contactable to a surface of said fixing roller to heat said fixing roller,
- wherein the sheet is outputted from said image forming apparatus after an unfixed toner image is fixed on the sheet,
- wherein said image forming apparatus is operable in a cleaning mode for cleaning said fixing unit, and
- wherein when the cleaning mode is selected, a predetermined unfixed toner image is formed on the sheet, and the sheet is fed to said fixing unit, and the toner is transferred from the sheet onto said fixing roller in said fixing nip, and then the toner transferred onto said fixing roller is brought into contact with said heating member, and thereafter, the toner on said fixing roller is transferred onto the sheet in said fixing nip.
An image forming apparatus for forming an toner image on a sheet, said image forming apparatus comprising:
- a fixing unit including a fixing roller, a back-up member configured to cooperate with said fixing roller to form a nip therebetween, and a rotatable heating member contactable to a surface of said fixing roller to heat said fixing roller,
- wherein the sheet is outputted from said image forming apparatus after an unfixed toner image is fixed on the sheet,
- wherein said image forming apparatus is operable in a cleaning mode for cleaning said fixing unit, and
- wherein when the cleaning mode is selected, a predetermined unfixed toner image is formed on a first sheet, and the first sheet is fed to said fixing unit, and the toner is transferred from the first sheet onto said fixing roller in said fixing nip, and then the toner transferred onto said fixing roller is brought into contact with said heating member, and thereafter, the toner on said fixing roller is transferred onto a second sheet in said fixing nip.
Dependencies are inferred from the claim text.