An image forming apparatus includes a storage part, an error detection part, a connection detection part, a determination part and a data transfer part. The first tension application device contacts the first belt to provide tension thereto. The diaphragm has a rod extending upward from a central location, and fastening the cap onto a bottle or container causes the rod to be pushed up into contact with, and activate, the timing device. Guide grooves are provided in the terminal case. Based on the usage data a usage profile is determined.