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:
Mar. 01, 2005
Filed:
Jun. 16, 2001
Uwe Greissing, Hardheim-Bretzingen, DE;
Dieter Adelmann, Kulsheim, DE;
Paul Eirich, Hardheim, DE;
Herbert Durr, Buchen-Hainstadt, DE;
Winfried Diem, Mannheim, DE;
Uwe Greissing, Hardheim-Bretzingen, DE;
Dieter Adelmann, Kulsheim, DE;
Paul Eirich, Hardheim, DE;
Herbert Durr, Buchen-Hainstadt, DE;
Winfried Diem, Mannheim, DE;
Maschinenfabrik Gustav Eirich GmbH & Co. KG, Hardheim, DE;
Abstract
A device for preparing moulding sand. The device includes a mixer configured to operate under at least a partial vacuum and at least one feeder to introduce components to be mixed. An inlet in the mixer is of sufficient size to allow rapid introduction of the components into the mixer from the feeder. The combination of large inlet opening and a pressure differential between the mixer and the feeder significantly reduces the time required to fill the mixer. In addition, the presence of the pressure differential made possible by the vacuum in the mixer reduces the likelihood that airborne contaminants resident in the mixer will migrate outside the mixer. Optional moveable conveyor chutes minimize contact of airborne contaminants with adjacent equipment, while optional mixing tools facilitate the introduction of powdered additives into the mixer.