| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealing plate having a highly reliable safety valve capable of satisfying both of durability against repeated stress due to an inner pressure smaller than an allowable pressure and the stability reliably opened by an operation pressure.SOLUTION: A sealing plate 3 has a plate part 3A and a safety valve 3B. The safety valve 3B is integrally formed with a part of the plate part 3A. The safety valve 3B includes: an outer concave 301; an inner concave 302; an outer periphery bent part 303; at least two hatch part 304; a ligament part 305; a first peripheral groove 31; a first traverse groove 32; a second peripheral groove 33.SELECTED DRAWING: Figure 2 |
