Image forming apparatus

An image forming apparatus comprising:

• an image bearing member for bearing an image;
• a movable recording material carrying member for electrostatically carrying the recording material;
• transfer means for electrostatically transferring the image from said image bearing member onto the recording material carried on said recording material carrying member at a transfer position, said transfer means being located at a position across from a side of said recording material carrying member carrying the recording material;
• and
• control means for controlling timing of start of change of a current flowing through said transfer means in accordance with a humidity so that the current reaches a level effective to transfer the image from said image bearing member onto the recording material carried on said recording material carrying member within a period in which a non-image formation area of the recording material at its leading edge is passing the transfer position.

An image forming apparatus comprising:

• an image bearing member for bearing an image;
• a movable recording material carrying member for electrostatically carrying the recording material;
• transfer means for electrostatically transferring the image from said image bearing member onto the recording material carried on said recording material carrying member at a transfer position, said transfer means being located at a position across from a side of said recording material carrying member carrying the recording material, and said transfer means being capable of transferring an image from said image bearing member onto a first side of the recording material carried on said recording material carrying member and then transferring an image from said image bearing member onto a second side of the recording material;
• control means for controlling timing of start of change of a current flowing through said transfer means depending upon whether the image is transferred onto the first side or the second side of the recording material so that the current reaches a level effective to transfer the image from said image bearing member onto the recording material carried on said recording material carrying member within a period in which a non-image formation area of the recording material at its leading edge is passing the transfer position.

An image forming apparatus comprising:

• an image bearing member for bearing an image;
• a movable recording material carrying member for electrostatically carrying the recording material;
• transfer means for electrostatically transferring the image from said image bearing member onto the recording material carried on said recording material carrying member at a transfer position, said transfer means being located at a position across from a side of said recording material carrying member carrying the recording material, and
• wherein a voltage applied to said transfer means changes so that a current flowing through said transfer means reaches a level effective to transfer the image from said image bearing member onto the recording material carried on said recording material carrying member within a period in which a non-image formation area of the recording material at its leading edge is passing the transfer position;
• and
• control means for controlling timing of start of change of a current flowing through said transfer means in accordance with a change of the voltage.