The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 02, 1991
Filed:
Apr. 03, 1990
Wilheim Reil, Bensheim, DE;
Tetra Pak Holdings & Finance S.A., Pully, CH;
Abstract
The invention describes an apparatus for the integral injection molding of a synthetic plastic top on a paper tube with an overall injection molding unit with a nozzle, a driven extruder worm (4), plasticising cylinder and a synthetic plastics injection unit, the nozzle being connected to the plasticising cylinder and being enclosed at least partially and externally by two movable outer mold parts, the inner mold part consisting of a movable mandrel. To reduce the technical complication while at the same time satisfying more fully the hygiene demands imposed on such machines, particularly in the foodstuffs sector, it is according to the invention suggested that the plasticising cylinder and the nozzle be stationary in their mountings on the machine frame and that the extruder worm be driven by an electric motor and that the synthetic plastics injection device comprise a two-armed lever which is driven and which is subject to the action of a control force unit and which is in contact with the extruder worm adapted for movement in the direction of its longitudinal axis.