Tube for pumping a space between two tiles, especially for a plasma display
AssigneeThomson Licensing
InventorAlain Normanni
Life of this patent
Estimating the term…
Abstract
Tube for pumping a space between two tiles, comprising a metal end-piece 9 and a glass tube 25 bonded together via a glass-to-metal seal 26; the metal end-piece 9 has shoulder means 3. Such a tube is especially intended to be fitted onto plasma displays or field emission displays. This tube is inexpensive and allows rapid and precise handling and fitting.
Claims13
- Tube for pumping, where appropriate for filling, and for sealing a space between two tiles, at least one of which is provided with a pumping orifice, comprising a cylindrical pumping pipe and metal shoulder means for this pipe on the tile, the said cylindrical pipe comprising a metal upstream portion whose part upstream of the shoulder means is intended to be fitted into the said orifice and a glass downstream portion, wherein the said upstream metal portion forms with these shoulder means a metal end-piece.
- Pumping tube according to claim 1, wherein the said metal end-piece is produced by machining or turning.
- Pumping tube according to claim 1, wherein the said metal end-piece is produced by punching a hole in at least one metal plate, the hole being made by punching, with the edges of the hole being made to stand up so that these edges form, at least in part, the upstream cylindrical portion of the pipe, the at least one metal plate forming the shoulder means.
- Pumping tube according to claim 1, wherein the said metal end-piece is produced by drawing at least one metal plate so as to form a hole with upstanding edges, forming, at least in part, the upstream cylindrical portion of the pipe (2), the at least one metal plate forming the shoulder means.
- Pumping tube according to claim 1, wherein it comprises a metal cylindrical sleeve which extends on each side of the shoulder means, onto which sleeve both the glass downstream portion of the pipe and circular edges of a hole formed in at least one metal plate forming the shoulder means are fitted.
- Pumping tube according to claim 1, wherein that the downstream portion of the pipe is joined to the metal upstream portion of this pipe by a glass-to-metal seal.
- Pumping tube according to claim 6, wherein, level with the said glass-to-metal seal, the cross section of the cylindrical wall of the upstream portion of the pipe in contact with the glass is chamfered.
- Pumping tube according to claim 7, wherein the shoulder means comprise a single metal plate onto which a glass end of the downstream portion of the pipe is bonded, circular edges of a hole formed in the metal plate extend upstream of the shoulder means, and the said metal plate has a convex circular groove, one of the flanks of which is located level with the glass-to-metal seal and forms the said chamfer.
- Display comprising two flat tiles defining between them a space at least one of which is provided with a pumping orifice into which a pumping tube is fitted according to claim 1 so that the shoulder surface of this tube is applied against that external surface of the tile which is located around the periphery of the pumping orifice.
- Display according to claim 9, wherein it includes a seal between the shoulder surface and the said external surface.
- Display according to claim 9, characterized in that the said pumping tube is sealed at the glass end.
- Plasma display according to claim 9.
- Field emission display according to claim 9.