Manufacture of metal tubes
AssigneePirelli General plc
InventorsJack Clark, Patrick B. Ryan
Life of this patent
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Abstract
An apparatus for forming metal tubes is shown in which a metal strip 2' having a brazing wire 1 bonded to an edge portion thereof passes through the apparatus and is formed by a combination of rollers 17, 17', 19, 19' and dies 15, 24 into a shape defining a tube. A frictional wheel 27 bonds together the two edge portions of the shape defining a tube.
Claims28
An apparatus for manufacturing an elongate metal tube comprising supplying means for supplying a brazing wire onto an edge portion of an elongate metal strip adjacent to and substantially parallel to the free edge thereof, first frictional means for forming a bond between the metal strip and the brazing wire located thereon, means for causing longitudinal relative movement between said first frictional means and the metal strip, forming means for forming the metal strip having brazing wire bonded thereto into a shape which defines a tube such that the brazing wire is sandwiched between said edge portion and the edge portion of the metal strip opposed thereto, second frictional means for forming a bond at the location of the brazing wire between said two edge portions of the metal strip, and means for causing longitudinal relative movement between said second frictional means and the metal strip.
A method of manufacturing an elongate metal tube comprising the steps of supplying a brazing wire onto an edge portion of an elongate metal strip adjacent to and substantially parallel to the free edge thereof, forming a bond by means of first frictional means between said metal strip and said brazing wire located thereon, causing longitudinal relative movement between said brazing wire and said first frictional means, forming said metal strip into a shape which defines a tube such that said brazing wire is sandwiched between said edge portion and the edge portion of the metal strip opposed thereto, forming a bond at the location of said brazing wire by means of a second frictional means between said two edge portions of the metal strip, and causing longitudinal relative movement between said edge portions and said second frictional means.
An apparatus for manufacturing an elongate metal tube comprising forming means for forming a metal strip into a shape defining a tube, means for supplying and locating a brazing wire onto an edge portion of the metal strip adjacent to and substantially parallel to the free edge thereof such that the brazing wire becomes sandwiched between said edge portion and the edge portion of the metal strip opposed thereto, frictional means for forming a bond between said two edge portions at the location of the brazing wire, and means for causing longitudinal relative movement between said frictional means and the metal strip.
A method of manufacturing an elongate metal tube comprising forming a metal strip into a shape defining a tube, supplying and locating a brazing wire onto an edge portion of said metal strip adjacent to and substantially parallel to the free edge thereof such that said brazing wire becomes sandwiched between said edge portion and the edge portion of said metal strip opposed thereto, using a frictional means to form a bond between said two edge portions at the location of said brazing wire, and causing longitudinal relative movement between said frictional means and said metal strip.
Dependencies are inferred from the claim text.