Empty container pressing apparatus

An empty container pressing system, comprising two vertically oriented empty container pressing apparatuses connected to one another with each of the two empty container pressing apparatus comprising:

• a pressure applying cylinder section in which a first cylinder chamber and a second cylinder chamber separated by a pressure receiving piston which slides in a cylinder chamber having the first cylinder chamber and the second cylinder chamber are disposed, wherein a changing over valve that works as an inlet to which a pressure applying medium supplied from an outside is input into the first cylinder chamber and also works as an outlet which drains the input pressure applying medium, the changing over valve is connected to the first cylinder chamber;
• a pressing section which is connected to the pressure applying cylinder section, and provides a pressing piston that moves together with the pressure receiving piston via a pressure transmitting member and applies pressing force to a plurality of empty containers;
• a collecting section connecting to the pressing section for collecting a pressed empty container;
• and
• a piston returning member that returns the pressure receiving piston to a position the pressure receiving piston occupied before being moved;
• wherein
• pressure received at the pressure receiving piston of one of the empty container pressing apparatuses is transmitted to the pressure receiving piston or the pressure transmitting member of the other of the empty container pressing apparatuses via a transferring section composed of a transferring member including one of a liquid and a mechanical linking member, and the pressure receiving piston and the pressing piston of one of the empty container pressing apparatuses and the pressure receiving piston and the pressing piston of the other of the empty container pressing apparatuses are moved together at the same time by the pressure received at the pressure receiving piston of one of the empty container pressing apparatuses.