Vacuum container of radiation image multiplier tube and method of manufacturing the same

Claim 1

A method of manufacturing a vacuum container of a radiation image multiplier tube in which a member of Al or an Al alloy containing a radiation input window is airtightly joined to an insulation member of glass or ceramic containing an output portion for outputting radiation image multiplied signals through a first ring made of Fe or Fe alloy, wherein, in bonding the first ring with the member of Al or Al alloy, one or more thin layers of a metal selected from the group consisting of Ni, Cu and Al are previously formed by metal plating or deposition on a portion to be joined of the member of Al or Al alloy and/or a portion to be joined of the first ring, are superposed in planes perpendicular to the axis of the tube and are airtightly joined by hot pressure-bonding while applying pressure in the direction of the tube axis by means of a press apparatus in such a manner that said portion to be joined of the member Al or Al alloy is compressed and caused to be substantially thinner than its initial thickness by the hot pressure-bonding.

Claim 2

A method of manufacturing a vacuum container of a radiation image multiplier tube in which a member of Al or an Al alloy containing a radiation input window is airtightly joined to an insulation member of glass or ceramic containing an output portion for outputting radiation image multiplied signals through a first ring made of Fe or Fe alloy, wherein, in bonding the first ring with the member of Al or Al alloy, one or more thin layers of a metal selected from the group consisting of Ni, Cu and Al are previously formed by metal plating or deposition on a portion to be joined of the member of Al or Al alloy and/or a portion to be joined of the first ring, are superposed in planes perpendicular to the axis of the tube and are airtightly joined by hot pressure-bonding while applying pressure in the direction of the tube axis by means of a press apparatus in such a manner that said portion to be joined of the member Al or Al alloy is compressed and caused to be substantially thinner than its initial thickness by the hot pressure-bonding.

Claim 4

A method of manufacturing a vacuum container of a radiation image multiplier tube in which a first member of Al or an Al alloy containing a radiation input window is airtightly joined to an insulation member of glass or ceramic containing an output portion for outputting radiation image multiplied signals through a first ring of Fe of Fe alloy, said method comprising the steps of: (a) depositing one or more thin layers of a metal selected from the group consisting of Ni, Cu and Al onto said ring and/or said first member in a joining region; (b) superposing said ring and said first member at said joining region in planes perpendicular to the axis of the tube;

Claim 5

A method of manufacturing a vacuum container of a radiation image multiplier tube in which a first member of Al or an Al alloy containing a radiation input window is airtightly joined to an insulation member of glass or ceramic containing an output portion for outputting radiation image multiplied signals through a first ring of Fe of Fe alloy, said method comprising the steps of: (a) depositing one or more thin layers of a metal selected from the group consisting of Ni, Cu and Al onto said ring and/or said first member in a joining region; (b) superposing said ring and said first member at said joining region in planes perpendicular to the axis of the tube;

Claim 8

A method of manufacturing a vacuum container of a radiation image multiplier tube in which a first member of Al or an Al alloy containing radiation input window is airtightly joined to an insulation member of glass or ceramic containing an output portion for outputting radiation image multiplied signals through a first ring of Fe or Fe alloy, said method comprising the steps of: (a) depositing one or more thin layers of a metal selected from the group consisting of Ni, Cu and Al onto said ring and/or said first member in a joining region; (b) superposing said ring and said first member at said joining region in planes perpendicular to the axis of the tube; (c) forming an airtight seal between said first ring and said first member by positioning the superposed ring and first member between a pressing apparatus and applying pressure to said joining region to deform said first member and thus hot-pressure bond said first member to said ring; and wherein prior to step (c) there is practiced the step of preventing attachment of said first member to said pressing apparatus by superposing a washer ring with said first member in registry with said joining region.

Claim 9

A method of manufacturing a vacuum container of a radiation image multiplier tube in which a first member of Al or an Al alloy containing radiation input window is airtightly joined to an insulation member of glass or ceramic containing an output portion for outputting radiation image multiplied signals through a first ring of Fe or Fe alloy, said method comprising the steps of: (a) depositing one or more thin layers of a metal selected from the group consisting of Ni, Cu and Al onto said ring and/or said first member in a joining region; (b) superposing said ring and said first member at said joining region in planes perpendicular to the axis of the tube; (c) forming an airtight seal between said first ring and said first member by positioning the superposed ring and first member between a pressing apparatus and applying pressure to said joining region to deform said first member and thus hot-pressure bond said first member to said ring; and wherein prior to step (c) there is practiced the step of preventing attachment of said first member to said pressing apparatus by superposing a washer ring with said first member in registry with said joining region.