| 摘要 |
A magnet is provided on either a negative film mask or a negative film mask table of a negative film mask apparatus, and a magnetic material is provided on the other of these. When the negative film mask in which a negative film has been loaded is placed on the negative film mask table, the negative film mask is held in place by a magnetic force. The negative film mask apparatus is provided with a stopper. The stopper is adapted to press a closely-contacting member against a sliding surface of the negative film mask table when necessary, thereby preventing the negative film mask from sliding. The closely-contacting member is made of a material such as rubber so that it can closely contact a sliding surface of the negative film mask table. Further, a magnetic member is included in the stopper. The stopper generates a large frictional force utilizing pressing force and magnetic force. Therefore, the negative film mask can be stably held in place in a state in which the negative film mask and the negative film mask table are inclined. Also, the large frictional force makes it possible to stably hold the negative film mask in place against a magnetic force which acts on the negative film mask in a horizontal direction.
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