Device for producing a three-dimensional object, especially a laser sintering machine

An apparatus for producing a three-dimensional part by successive layer-by-layer solidification of a solidifiable material, which is solidified at locations corresponding to the cross section of said part, said apparatus comprising:

• a machine housing;
• a building space provided in the machine housing;
• an interchangeable container forming a delimiting frame for said material within said building space, said container having a work piece platform;
• and a supporting device, on which said work piece platform is supported during operation of the apparatus;
• wherein said interchangeable container comprises a recess through which the supporting device can be engaged and in which the supporting device can be displaced;
• wherein said recess is formed in a slot-shaped manner in a direction of displacement of the supporting device, further comprising a tape seal mounted to a wall of said interchangeable container above said recess, said tape seal surrounding said recess and being pressed against the wall by said work piece platform.