Patent ID: 6895032

Claim:
A high-pressure processing apparatus comprising: a pressure vessel including a first vessel section and a second vessel section capable of axial separation from each other for treating a workpiece with a high pressure medium in a high-pressure processing chamber formed between said first and second vessel sections; a face seal section formed in a contact area between said first and second vessel sections for sealing said high-pressure processing chamber; a press apparatus for providing an axial force to the face seal section, said press apparatus being disposed so as to press against said second vessel section by contacting with a part of a surface of said second vessel section opposite to said first vessel section; and a supplementary apparatus for changing the condition in said high-pressure processing chamber, said supplementary apparatus being disposed so as to be in contact with another part of the surface of said second vessel section, which surface is pressed by said press apparatus, and said another part of the surface not being in contact with said press apparatus.