A container with a rim portion defining an opening, method and apparatus making said container

摘要

A method for making a container having a rim defining an opening for the container, the opening being capable of being closed by a push-on lid. The method comprises the steps of : a) providing a preform (9) having a rim at its mouth comprising: an outward generally radial flange (8); a first detent (10) located near the radially inner end of the flange and a second detent (11) located near the radially outer end of the flange; b) placing the preform (9) in a pressure moulding apparatus at an elevated temperature with the preform (9) being located in the apparatus by the second detent (11); c) expanding the preform (9) under pressure to form the body of the container; d) moving the first detent (10) downwardly and outwardly relative to the second detent (11) so that the first detent (10) projects inwardly into the opening for the container with its elongate axis at an angle of from 60° to 120° to the elongate axis of the second detent (11), such that the first detent (10) forms an internal rim.