Image forming apparatus and image forming system having a controller that controls a rubbing treatment for a fixing roller of a replaceable fixing portion

An image forming system comprising:

• an image forming apparatus including an image forming station configured to form a unfixed toner image on a recording material;
• a mounting portion configured to mount one of fixing devices each including a first rotatable member and a second rotatable member which cooperate with each other to form a nip for fixing the unfixed toner image on the recording material fed from said image forming station, a rubbing rotatable member configured to rub a surface of said first rotatable member, and a discrimination portion indicative of identifying information for discriminating said fixing device from another fixing device;
• and a counter configured to count the recording materials fed to said fixing device mounted on said mounting portion;
• and
• a storing device configured to store number information indicative of the number counted by said counter, in correlation with the identifying information,
• wherein said counter counts the recording materials fed to said fixing device mounted on said mounting portion, on the basis of the number information stored in said storing device in correlation with the identifying information of said fixing device mounted on said mounting portion, and
• wherein said image forming apparatus executes a rubbing treatment of a rubbing rotatable member to said first rotatable member of the fixing device mounted on said mounting portion, when the number counted by said counter exceeds a predetermined number.

An image forming apparatus comprising:

• an image forming station configured to form a unfixed toner image on a recording material;
• a mounting portion configured to mount one of fixing devices each including a first rotatable member and a second rotatable member which cooperate with each other to form a nip for fixing the unfixed toner image on the recording material fed from said image forming station, a discrimination portion indicative of identifying information for discriminating said fixing device from another fixing device mountable on said mounting portion in place of said fixing device mounted on said mounting portion, a rubbing rotatable member configured to rub a surface of said first rotatable member, a fixing device storing portion capable of storing information;
• a counter configured to count the recording materials fed to said fixing portion mounted on said mounting portion;
• a main assembly storing portion capable of storing information;
• a writing portion configured to write the number information indicative of the number counted by said counter in said main assembly storing portion in correlation with the identifying information and to write the number information in said fixing device storing portion;
• and
• an executing portion configured to execute a rubbing treatment of a rubbing rotatable member to said first rotatable member of the fixing device mounted on said mounting portion, when the number counted by said counter on the basis of the information acquired from said fixing storing portion and said main assembly storing portion exceeds a predetermined number.