Press having dust generation preventing mechanism

Disclosed is an electric press with a substantially airtight casing containing therein a drive device for reciprocatingly moving a ram relative to a work positioned on a base to press the work, and a device for exhausting the dusts produced within the casing from a room where the electric press is located to the outside into open air through a pipe connected to the casing, the electric press comprising dust exhausting means including at least two openings provided at the casing thereof, one of the openings being of a relatively small diameter to be used in connection with an exhauster of a normal level of exhausting ability and the other of the openings being of a relatively large diameter to be used in connection with an exhauster of a relatively low level of exhausting ability. Further the casing is divided into an upper portion and a lower portion, and the upper portion is detachably mounted to above-mentioned lower portion. The dust exhausting means includes a sealing sheet of a property preventing dusts from passing therethrough, the sealing sheet has one end secured to the inside of the upper portion of above-mentioned casing such that the free end of the sealing sheet extends down into the lower portion of that casing all therearound to close a clearance between the upper portion and the lower portion, above-mentioned sheet being yielding to the exhausting force of above-mentioned exhauster to allow outer air to flow into above-mentioned casing through the clearance when the exhauster is operated.