Patent ID: 6823778
Filing Date: 2004-11-30
Classification: B30B

Abstract:
Safety device for a pneumatic membrane press having at least one inlet for insertion of materials to be pressed or discharge of solid pressing residues, said inlet adapted to be closed by a door, the device comprising:at least one unit for controlled establishment of a leak; each unit being associated with a cooperating inlet and door; each unit including an actuator module comprising an opening for receiving a key mounted on the door under consideration, and an actuating member whose position depends on the presence of the key in said opening; a valve module comprising a sealing member for a circulation duct between a first aperture in fluid connection with one or more inflation volume pressurized when the press is pressurized, and a second aperture opening into the open air; the actuating member allowing the closure of said circulation duct by the sealing member, when the key is present or totally engaged in the opening, and forcing the freeing of said duct when the, key is not in said opening or is insufficiently engaged in said opening; the inflation volume corresponding to an internal volume jointly defined by a membrane and a part of a wall of a tank of the press; and a pneumatic sealing module which is controlled by the pressure applied when the tank is pressurized and whose state is controlled by the unit; said pneumatic sealing module being mounted in the region of an opening of an escape duct in direct connection with the volume of the pressurized tank.