Substrate container sealing via movable magnets

A system comprising:

• a plurality of moveable magnets disposed near a perimeter of a container door, at least one of the movable magnets having a mounting portion and an end portion disposed facing a container in both a sealing position and an open position;
• a magnet positioning mechanism connecting to each of the moveable magnets to control movement of the moveable magnets in relation to the sealing position;
• the container with an opening shaped to receive the door thereby closing the opening, where the at least one of the moveable magnet is movably mounted to the container door at the mounting portion and the end portion of the at least one moveable magnet is movable in a movement direction substantially parallel to a direction of insertion of the container door into the container so that a gap in the movement direction between the end portion, of the at least one movable magnet, facing the container in both the sealing position and open position changes when the magnet is moved;
• and
• a plurality of magnetically attractive elements disposed near the opening and positioned to form a magnetic seal with the moveable magnets when the moveable magnets are positioned at the sealing position.