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:
Nov. 02, 1976
Filed:
Sep. 23, 1974
Erwin Buhrer, Schaffhausen, CH;
Other;
Abstract
A storage vessel filled with a granular composition for forming mold parts has a bottom opening aligned with an opening in a pressure vessel located directly below the storage vessel. Upon being filled with the granular composition from the storage vessel, the pressure vessel is arranged so that the opening can be closed. The pressure vessel is movable vertically toward and away from the storage vessel. In its upper position it can be filled with the composition, and in its lower position can evacuate the granular composition into a cavity in a core molding device through nozzles situated at the bottom of the pressure vessel. The nozzles are directed into bores in the molding device and allow the granular material to exit when a compressed air source within the pressure vessel is activated.