Image forming apparatus

An image forming apparatus comprising

• a feeding means for feeding a sheet;
• at least one image forming means arranged in confronting relation to said feeding means, for forming an image on said sheet being fed by said feeding means;
• a shifting means for changing a positional relation between said feeding means and said image forming means to a contacted condition or a separated condition, by shifting at least one of said feeding means and image forming means;
• a drive means for driving said feeding means;
• a cleaning means for cleaning said feeding means and
• a changing means for changing a driving speed of said drive means to a first speed when said positional relation between said feeding means and said image forming means is in said contacted condition and to a second speed faster than said first speed when said positional relation between said feeding means and said image forming means is in said separated condition.

An image forming apparatus comprising

• a feeding means for feeding a sheet;
• at least one image forming means arranged in confronting relation to said feeding means, for forming an image on said sheet being fed by said feeding means;
• a shifting means for changing a positional relation between said feeding means and said image forming means to a contacted condition or a separated condition, by shifting at least one of said feeding means and image forming means;
• a drive means for driving said feeding means;
• a cleaning means for cleaning said feeding means;
• a jam detection means for emitting a signal when a jam of said sheet is detected;
• a jam elimination detecting means for emiting a signal when it is judged that the jammed sheet is eliminated;
• and
• a control means for stopping operations of said image forming means and said drive means and for carrying out separation between said feeding means and said image forming means through said shifting means, on the basis of said signal emitted from said jam detection means, and for performing cleaning operation by means of said cleaning means while driving said drive means at a speed faster than of said drive means during the image formation for a predetermined time, for stopping said drive means after said predetermined time is elapsed, and for changing said positional relation between said feeding means and said image forming means to said contacted condition through said shifting means, on the basis of said signal emitted from said jam elimination detecting means.

An image forming apparatus comprising

• a feeding means for feeding a sheet;
• at least one image forming means arranged in confronting relation to said feeding means, for forming an image on said sheet being fed by said feeding means;
• a shifting means for changing a positional relation between said feeding means and said image forming means to a first condition that image formation is carried out or a second condition that the image formation is not carried out, by shifting at least one of said feeding means and image forming means;
• a drive means for driving said feeding means;
• a cleaning means for cleaning said feeding means;
• a signal generating means for emitting a signal;
• a changing means for changing driving speed of said drive means to a first speed or to a second speed faster than said first speed;
• and
• a control means for changing said first condition to said second condition by controlling said shifting means and for changing said first speed to said second speed, on the basis of said signal emitted from said signal generating means.