Method for fastening a cover plate to a frame structure

A method, comprising:

• drawing through an opening of a frame structure a vacuum in a cavity of the frame structure by connecting a vacuum pump to the opening of the frame structure;
• placing a cover plate upon a surface of the frame structure above a number of channels of the frame structure which connect the surface with the cavity, with the cavity being gas-tight except for the channels and the opening;
• and
• fixing the cover plate on the surface of the frame structure.

A method for fastening a cover plate to a frame structure, comprising:

• drawing through an opening of a frame structure a vacuum in a first cavity and a second cavity of the frame structure, with the second cavity at least partially surrounding the first cavity, by connecting a vacuum pump to the opening of the frame structure;
• placing an edge region of a cover plate upon a surface of the frame structure above a number of channels of the frame structure, which connect the first cavity to the surface, such that the channels extend between two substantially parallel cover layers of the cover plate;
• and
• evacuating the first and the second cavities such that the second cavity has a pressure which is higher than a pressure of the first cavity.

A frame structure, comprising:

• a first cavity;
• a second cavity at least partially surrounding the first cavity;
• a number of channels connecting the first cavity to a surface of the frame structure;
• and
• an opening for connection of a vacuum pump to apply a vacuum in the first and second cavities to thereby draw an edge region of a cover plate, placed upon the surface of the frame structure above the number of channels such that the channels extend between two substantially parallel cover layers of the cover plate, and to evacuate the first and the second cavities such that the second cavity has a pressure which is higher than a pressure of the first cavity.