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:
Sep. 01, 1992
Filed:
Dec. 18, 1990
Wilhelm Reil, Bensheim, DE;
Ulrich Deutschbein, Muhltal, DE;
Gerd Knobloch, Griesheim, DE;
Udo Liebram, Pfungstadt, DE;
Tetra Pak Holdings S.A., Pully, CH;
Abstract
A method of manufacturing a package (1) which is filled with a flowable medium and which comprises a tube (3), a bottom and a top wall (2) of shapeable synthetic plastics material in which the package (1) formed by shaping and the action of heat is filled, sealed and carried away is described. In order to provide an environmentally friendly manufacturing method in which a package can be produced by deep-drawing and without any substantial amount of waste material, it is according to the invention envisaged that two prepared blanks (4), each of which takes the form of a flat sheet, should be heated at a distance from each other (in III-V) and then brought together along a frame-like strip (7 to 11) and, accompanied by (at V) deep-drawing of the middle zone (12) within the frame-like strip (10), welded together to form the package space, an aperture (13) being provided in a top wall (2), the package (1) which is thus formed and which is fluid-tight with the exception of the aperture zone (3) being then cooled, conveyed onwardly (18 to 20), filled (in position XI) and sealed by an opening member (14) which masks the aperture (13).