VESSEL WITH COVER

PROBLEM TO BE SOLVED: To provide a vessel with a cover in which a closing force for closing a cover is reduced and the cover is exactly sealed in the vessel. SOLUTION: The vessel with the cover made of elastic plastic and used for an experiment has a vessel base at one end, a vessel opening at the other end, a tubular vessel having a holding area on the inner wall of the vessel and an insertion area between the vessel opening and the holding area, a cover base, a stopper on one side of the cover base, and a cover insertable in a sealing position in the vessel via the vessel opening. The sealing area of the stopper is placed on a sealing sheet on the inner wall of the vessel, and has a slide ring and a holding ring on the outer circumference of the stopper. A slide friction coefficient between the slide ring and the insertion area is smaller than a slide friction coefficient between the holding ring and the holding area. In the case of attachment, the slide ring slides on the insertion area to be placed at the sealing position of the holding ring in the holding area. COPYRIGHT: (C)2007,JPO&INPIT