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:
Jun. 26, 2001
Filed:
Mar. 29, 1999
Method and mould tools for injection moulding a plastics material part in a packaging sheet material
Magne Karlsson, Lund, SE;
Tetra Laval Holdings & Finance S.A., Pully, CH;
Abstract
A method of injection molding a plastics material opening device in a hole provided in a packaging sheet material including mutually arranging a first mold tool and a second mold tool so as to form a mold cavity in which the hole edge is arranged in so as to biased a sheet portion of the packaging sheet material arranged adjacent the hole edge away from the second mold tool, and injecting heated thermoplastics material into the mold cavity so as to form the plastics material opening device. The biasing of the sheet portion away from the second mold tool aids in the formation of plastics material on the side of the sheet portion disposed towards the second mold tool, for providing a controlled placement of the opening device at the sheet hole.