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:
Dec. 28, 1976
Filed:
Feb. 21, 1975
Werner Schrammel, Emmendingen, D;
Wolfgang Spath, Lahr, D;
Klockner-Werke AG, Duisburg, D;
Abstract
An injection-molding apparatus for making ceramic moldings has a mold provided with a mold cavity, a structure formed with a passage which communicates with the mold cavity, and an injecting arrangement for injecting the molding material via the passage into the cavity. The injecting arrangement has a cylinder a front end of which is provided with an outlet communicating with the passage, and which also has a material inlet rearwardly spaced from the outlet. A ram is reciprocable in the cylinder between a first end position in which it is located rearwardly of the inlet and another end position in which it is located forwardly of the inlet and close to the outlet. The ram carries a rearwardly extending skirt which extends across the inlet when the ram is in its forward or second end position, so as to prevent material from entering the cylinder behind the ram through the inlet.