Mobile fluid-tight sealing device

Claim 2

A movable sealing device for an electron beam welding device comprising a fixed chamber, a mobile vacuum chamber positioned to cover a portion of said fixed chamber, a tape having its edges applied in a fluid-tight manner on each side of a line of opening of said fixed chamber, cylindrical and conical rollers in contact with said tape, a first extremity of said tape penetrating into said mobile chamber passing under a first said cylindrical roller about which the general direction of the tape is desired and moves away from said line of opening so as to uncover a working passage at its level, said tape then passing round a first said conical roller which displaces said tape obliquely with respect to the normal plane of access to said working passage, said tape then passing round a second said conical roller which sends the tape in a general direction parallel to said line of opening but following an oblique plane with reference to the plane of said tape when it is located outside said mobile chamber and in a position displaced to one side with respect to a plane normal to this latter at the level of the line of opening, two further said conical rollers and a further said cylindrical roller symmetrically disposed with respect to said firstmentioned three rollers, said latter conical rollers and cylindrical roller permitting a second extremity of said tape passing out of said mobile chamber to be applied against the opposite side of the line of opening with respect to the center of said mobile chamber so as again to close in a fluid-tight manner the line of opening of the other side of the passage uncovered for the welding.

Claim 3

A movable sealing device for an electron beam welding device comprising a fixed chamber, a mobile vacuum chamber positioned to cover a portion of said fixed chamber, a tape having its edges applied in a fluid-tight manner on each side of a line of opening of said fixed chamber, cylindrical and conical rollers in contact with said tape, a first extremity of said tape penetrating into said mobile chamber passing under a first said cylindrical roller about which the general direction of the tape is desired and moves away from said line of opening so as to uncover a working passage at its level, said tape then passing round a first said conical roller which displaces said tape obliquely with respect to the normal plane of access to said working passage, said tape then passing round a second said conical roller which sends the tape in a general direction parallel to said line of opening but following an oblique plane with reference to the plane of said tape when it is located outside said mobile chamber and in a position displaced to one side with respect to a plane normal to this latter at the level of the line of opening, two further said conical rollers and a further said cylindrical roller symmetrically disposed with respect to said first-mentioned three rollers, said latter conical rollers and cylindrical roller permitting a second extremity of said tape passing out of said mobile chamber to be applied against the opposite side of the line of opening with respect to the center of said mobile chamber so as again to close in a fluid-tight manner the line of opening of the other side of the passage uncovered for the welding.

Claim 4

A movable sealing device for an electron beam welding device comprising a fixed chamber, a mobile vacuum chamber positioned to cover a portion of said fixed chamber, a tape having its edges applied in a fluid-tight manner on each side of a line of opening of said fixed chamber, cylindrical and conical rollers in contact with said tape, a first extremity of said tape penetrating into said mobile chamber passing under a first said cylindrical roller about which the general direction of the tape is desired and moves away from said line of opening so as to uncover a working passage at its level, said tape then passing round a first said conical roller which displaces said tape obliquely with respect to the normal plane of access to said working passage, said tape then passing round a second said conical roller which sends the tape in a general direction parallel to said line of opening but following an oblique plane with reference to the plane of said tape when it is located outside said mobile chamber and in a position displaced to one side with respect to a plane normal to this latter at the level of the line of opening, two further said conical rollers and a further said cylindrical roller symmetrically disposed with respect to said first-mentioned three rollers, said latter conical rollers and cylindrical roller permitting a second extremity of said tape passing out of said mobile chamber to be applied against the opposite side of the line of opening with respect to the center of said mobile chamber so as again to close in a fluid-tight manner the line of opening of the other side of the passage uncovered for the welding.

Claim 5

The movable device of claim 1, further characterized by said mobile vacuum chamber being a bell which is fitted to be displaced along a curvilinear welding joint between two cylindrical barrel plates to be welded.

Claim 6

A sealing device for plates to be welded comprising a gantry girder adjacent the plates to be welded, sole plates fixed on said gantry girder, said gantry girder resting on said sole plates with said sole plates in fluid-tight contact with the plates to be welded, moldable means forming the fluid-tight contact between said sole plates and the plates to be welded, travelling rails positioned within said gantry girder, a mobile vacuum chamber movable within said gantry girder on said rails, a fixed chamber positioned to be partially covered by said mobile chamber, a tape having its edges applied in a fluid-tight manner on each side of a line of opening of said fixed chamber, cylindrical and conical rollers in contact with said tape, a first extremity of said type penetrating into said mobile chamber passing under a first said cylindrical roller about which the general direction of the tape is desired and moves away from said line of opening so as to uncover a working passage at its level, said tape then passing round a first said conical roller which displaces said tape obliquely with respect to the normal plane of access to said working passage, said tape then passing round a second said conical roller which sends the tape in a general direction parallel to said line of opening but following an oblique plane with reference to the plane of said tape when it is located outside said mobile chamber and in a position displaced to one side with respect to a plane normal to this latter at the level of the line of opening, two further said conical rollers and a further said cylindrical roller symmetrically disposed with respect to said first-mentioned three rollErs, said latter conical rollers and cylindrical roller permitting a second extremity of said tape passing out of said mobile chamber to be applied against the opposite side of the line of opening with respect to the center of said mobile chamber so as again to close in a fluid-tight manner the line of opening of the other side of the passage uncovered for the welding.

Claim 7

A sealing device for plates to be welded comprising a gantry girder adjacent the plates to be welded, sole plates fixed on said gantry girder, said gantry girder resting on said sole plates with said sole plates in fluid-tight contact with the plates to be welded, moldable means forming the fluid-tight contact between said sole plates and the plates to be welded, travelling rails positioned within said gantry girder, a mobile vacuum chamber movable within said gantry girder on said rails, a fixed chamber positioned to be partially covered by said mobile chamber, a tape having its edges applied in a fluid-tight manner on each side of a line of opening of said fixed chamber, cylindrical and conical rollers in contact with said tape, a first extremity of said type penetrating into said mobile chamber passing under a first said cylindrical roller about which the general direction of the tape is desired and moves away from said line of opening so as to uncover a working passage at its level, said tape then passing round a first said conical roller which displaces said tape obliquely with respect to the normal plane of access to said working passage, said tape then passing round a second said conical roller which sends the tape in a general direction parallel to said line of opening but following an oblique plane with reference to the plane of said tape when it is located outside said mobile chamber and in a position displaced to one side with respect to a plane normal to this latter at the level of the line of opening, two further said conical rollers and a further said cylindrical roller symmetrically disposed with respect to said first-mentioned three rollErs, said latter conical rollers and cylindrical roller permitting a second extremity of said tape passing out of said mobile chamber to be applied against the opposite side of the line of opening with respect to the center of said mobile chamber so as again to close in a fluid-tight manner the line of opening of the other side of the passage uncovered for the welding.

Claim 8

The sealing device of claim 3, further characterized by means to move said girder in at least one direction transverse to its length.

Claim 9

A sealing device for plates to be welded with an electron gun comprising a mobile vacuum chamber carrying the electron gun, carriage means for supporting said mobile chamber for travel over the plates to be welded, fluid-tight means connecting said mobile chamber to the plates to be welded cooperating with said carriage means to form a fluid-tight connection between said mobile chamber and plates to be welded, a fixed chamber positioned to be partially covered by said mobile chamber during its travel over the plates to be welded, a tape having its edges applied in a fluid-tight manner on each side of a line of opening of said fixed chamber, cylindrical and conical rollers in contact with said tape, a first extremity of said tape penetrating into said mobile chamber passing under a first said cylindrical roller about which the general direction of the tape is desired and moves away from said line of opening so as to uncover a working passage at its level, said tape then passing round a first said conical roller which displaces said tape obliquely with respect to the normal plane of access to said working passage, said tape then passing round a second said conical roller which sends the tape in a general direction parallel to said line of opening but following an oblique plane with reference to the plane of said tape when it is located outside said mobile chamber and in a position displaced to one side with respect to a plane normal to this latter at the level of the line of opening, two further said conical rollers and a further said cylindrical roller symmetrically disposed with respect to said first-mentioned three rollers, said latter conical rollers and cylinder roller permitting a second extremity of said tape passing out of said mobile chamber to be applied against the opposite side of the line of opening with respect to the center of said mobile chamber so as again to close in a fluid-tight manner the line of opening of the other side of the passage uncovered for the welding.

Claim 10

A sealing device for plates to be welded with an electron gun comprising a mobile vacuum chamber carrying the electron gun, carriage means for supporting said mobile chamber for travel over the plates to be welded, fluid-tight means connecting said mobile chamber to the plates to be welded cooperating with said carriage means to form a fluid-tight connection between said mobile chamber and plates to be welded, a fixed chamber positioned to be partially covered by said mobile chamber during its travel over the plates to be welded, a tape having its edges applied in a fluid-tight manner on each side of a line of opening of said fixed chamber, cylindrical and conical rollers in contact with said tape, a first extremity of said tape penetrating into said mobile chamber passing under a first said cylindrical roller about which the general direction of the tape is desired and moves away from said line of opening so as to uncover a working passage at its level, said tape then passing round a first said conical roller which displaces said tape obliquely with respect to the normal plane of access to said working passage, said tape then passing round a second said conical roller which sends the tape in a general direction parallel to said line of opening but following an oblique plane with reference to the plane of said tape when it is located outside said mobile chamber and in a position displaced to one side with respect to a plane normal to this latter at the level of the line of opening, two further said conical rollers and a further said cylindrical roller symmetrically disposed with respect to said first-mentioned three rollers, said latter conical rollers and cylinder roller permitting a second extremity of said tape passing out of said mobile chamber to be applied against the opposite side of the line of opening with respect to the center of said mobile chamber so as again to close in a fluid-tight manner the line of opening of the other side of the passage uncovered for the welding.