An image forming apparatus of an embodiment has a printer portion, a fan motor, a counter, a timer, and a control unit. A content delivery network service provider receives a DNS query from a client computing device. The key bolt passes through the bolt hole of said main body, and is threaded into the threaded aperture of the locking nut, whereby the key bolt is selectively tightened to force the threaded portion of the locking nut into engagement with the threaded stem. A pressurized stream of air or water is directed at the cartridge filter with the user’s other hand such that the stream causes the whole to rotate. Furthermore, a plurality of such automated cartridge exchange systems can be installed between adjacent automated tape libraries to provide the redundancy not available from the existing approaches.