Abstract: A communication system (100) includes: a plurality of stacked containers (2) having conductivity; and a plurality of electric field communication terminals (5) attached to the containers (2) in such a manner as to perform electric field coupling with any of the plurality of containers (2), in which the plurality of containers (2) includes a container (2) that contains a sensing terminal (4) that acquires sensing data, the plurality of electric field communication terminals (5) includes a first electric field communication terminal (5) attached to an inner side of the container (2) in which the sensing terminal (4) is contained, and a second electric field communication terminal (5) attached to an outer side of at least one container (2) of the plurality of containers (2), and the first electric field communication terminal (5) transmits the sensing data from the sensing terminal (4) to the second electric field communication terminal (5) via the plurality of containers (2).

Abstract: A bank note processing machine has at least one cassette in which feed rollers and a gate gap is provided to enable conveying of bank notes. When the cassette is placed outside the machine, the feed rollers are locked. When the cassette is loaded in the main body of the machine, the lock is released. The feed rollers provided in the cassette 2 are driven by one driving system while first and second bank note conveying system in the cassette and the main body are driven by the other driving system.