Patent ID: 8414705
Filing Date: 2013-04-09
Classification: H01J

Abstract:
1. A seal mechanism that is disposed between first and second structural members having opposing surfaces, comprising: a first seal trench that is formed in a first opposing surface of the first structural member; a first seal member that is housed in said first seal trench, and part of which projects from the first opposing surface; a second seal trench that is formed in a second opposing surface of the second structural member; and a second seal member that is housed in said second seal trench, and part of which projects from the second opposing surface, wherein said first seal member and said second seal member are brought into pressure contact with each other, said first seal trench comprises a first seal surface from which aluminum is exposed and with which said first seal member is brought into pressure contact, and a first shut-off surface that is disposed between the first opposing surface and the first seal surface, said first seal member comprises a first covering portion that covers the first shut-off surface when said first seal member is housed in said first seal trench, said second seal trench comprises a second seal surface from which aluminum is exposed and with which said second seal member is brought into pressure contact, and a second shut-off surface that is disposed between the second opposing surface and the second seal surface, and said second seal member comprises a second covering portion that covers the second shut-off surface when said second seal member is housed in said second seal trench.