Patent ID: 6340440
Filing Date: 2002-01-22
Classification: B29C,B29L,B65D

Abstract:
A method of producing a substantially tubular container body of plastic material which is open at one end and has at an opposite end, an emptying mouth with a closure means thereat, the container body having a substantially cylindrical wall between said ends thereof, the closure means being integral with said opposite end of the container body, said method comprisingintroducing molten plastic material into an injection mould to form therein a blank comprising a body having a tubular portion which is open at one end and has a mouth at its opposite end and a closure means integrally formed with said body and providing a hinged closing member for said mouth, subjecting the tubular portion of said blank to a drawing operation in which a wall of said tubular portion passes through a gap to cause said wall to undergo a reduction in thickness while being elongated in length to form the tubular container body whose one end which is open and whose opposite end formed by said mouth with said closure means integrally formed thereat, the reduction of said wall thickness being between 2.5 and 5 times, severing the tubular article at said open end to prepare said open end for closure to form a container after the tubular article is filled with its contents, and wherein on removal of the blank from the injection mould, a mechanical device displaces the closure means to a position in which all parts of the closure means are located at a distance from a geometric center axis of the blank at most amounting to a distance between said geometric center axis and a surface of the gap located most proximal to said center axis.