A New or Improved Method of and Means for Manufacturing Tins, Designed to be Closed by Capsuling.

摘要

23,218. Woolnough, W. Nov. 16. Metal, sheet, curling edges of.-Consists in employing mechanical means for making in one piece the tops of tins, and particularly the circular flange or lip. For this purpose, an annular dished blank is placed upon the specialty-shaped chuck a1, and a die b, upon the same lathe bed or support, is brought to bear against it. While so doing, a revolving wheel or roller c is brought down into the position shown with the effect that the neck of the metal is slightly reduced in thickness thereby enabling the edge g', which during the operation has been turned upon itself, to turn outwardly into the corner a3 of the chuck. To facilitate the soldering of the part thus formed to the body of the tin, an annular groove or recess is formed by an ordinary process in the peripheral flange.