Patent ID: 7488453

Claim:
A reagent vessel cap comprising: sealing member for sealing the opening of a reagent vessel; a pressurizing member linked to a retaining part for the sealing member to bring the sealing member in close contact with the opening all the time, wherein when pressure is applied, the pressurizing member lifts the sealing member against the biasing force of itself to open the vessel and, when the pressure is eliminated, the pressurizing member returns to position by the biasing force to close the vessel by the sealing member; a long housing attached to the part of an outer periphery of the cap integrally and laterally, and having an opening at a top of the housing, wherein the housing is constructed such that symmetric shaft bearings formed in the side walls of the housing apart from the cap are horizontal long holes to allow an arm of the pressurizing member to be slightly moved to and fro with the rotation of the pressurizing member supported by the shaft bearings; wherein the sealing member, the retaining part, and the pressurizing member are capable of mounting to the opening of the vessel containing a reagent.