Image forming apparatus

An image forming apparatus comprising:

• an image bearing member to bear a latent image on a surface thereof;
• a developing device to supply toner to the image bearing member to develop the latent image into a toner image;
• an intermediate transfer member disposed opposite the image bearing member to form a primary transfer nip therebetween to transfer primarily the toner image borne on the image bearing member onto the intermediate transfer member;
• a secondary transfer member disposed opposite the intermediate transfer member to form a secondary transfer nip therebetween to transfer secondarily the toner image borne on the intermediate transfer member onto a recording medium;
• a cleaning device to clean the secondary transfer member for a predetermined time period T1 during a startup operation after printing is completed normally before subsequent printing;
• and
• a main body to house the image bearing member, the developing device, the intermediate transfer member, the secondary transfer member, and the cleaning device,
• wherein at least one of the image bearing member and the developing device constitutes a process cartridge detachably attachable relative to the main body, and in a case in which the process cartridge is installed in the main body, the cleaning device cleans the secondary transfer member for a time period T2 extended from the predetermined time period T1.