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:
Aug. 07, 2001
Filed:
Nov. 19, 1999
Applicant:
Inventors:
Walther Bartel, Stuttgart, DE;
Wolfgang Cedzich, Remseck, DE;
Robert Vaculik, Marbach, DE;
Richard Veigel, Tamm, DE;
Assignee:
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 3/352 ; B29C 4/526 ;
U.S. Cl.
CPC ...
B29C 3/352 ; B29C 4/526 ;
Abstract
A process for manufacturing hollow synthetic resin bodies or objects in which cores are produced in casting molds, then placed into molds of injection molding machines, and subsequently enveloped with injected synthetic resin material (,) which then solidifies. The molds are then heated up to a temperature at which the cores melt and at which the molten cores can be removed from the molds. The cores are made of shell halves (,) which are assembled before the synthetic resin material (,) is injection molded around them.