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. 13, 1999
Filed:
Dec. 04, 1996
Klaus Schramm, Essen, DE;
Michael Blank, Wuppertal, DE;
Fried. Krupp AG Hoesch-Krupp, Essen, DE;
Abstract
Apparatus of injection molding three-layer moldings, especially bottle blanks with an inner and an outer layer of polyethylene terephthalate and a middle layer of recycled polyethylene terephthalate, employing a mold with several cavities. The material (component A) for the inner and outer layers is supplied through one molten-component conveying channel and the material (component B) for the middle layer through another molten-component conveying channel. The channels are separately heated and their temperatures independently regulated. The melt for component A flows the same distance as the melt for component B. The melts flow into the injection-molding dies such as to ensure a uniform front.