A system and method for maintaining an air inflation mattress configuration sufficient for patient support and comfort. The ratio of the amount of the recovered toner to be supplied into the developing device to the amount of new toner is arbitrarily increased or reduced. The actuator is linked to a fluid flow channel formed by correspond recesses in the base and cover parts, respectively, and a nozzle outlet. For the n-FET device, the at least one overhang is selectively arranged in directions of and transverse to a current flow, and for the p-FET device, the at least one overhang is arranged transverse to the current flow to prevent performance degradation from compressive stresses. The second lens system has a maximum of five lenses. Further, for a read operation, the file system calls a routine, which is provided with one or more pointers to the data that is to be sent to a requester of the data.