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. 24, 1976
Filed:
Nov. 05, 1973
Applicant:
Inventors:
Hans Ulrich Hauser, Niederweningen, CH;
Eduard Hartmann, Urdorf, CH;
Assignee:
Bucher-Guyer AG Maschinenfabrik, Niederweningen, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29F / ;
U.S. Cl.
CPC ...
425145 ; 425147 ;
Abstract
An injection moulding machine used in conjunction with a closed split mould, has its shot volume controlled by a device which responds to widening of the mould parting line occurring when the mould is completely filled with moulding material as a result of the pressure build up which occurs inside the mould. Contactless sensing of widening of the parting line is described, by means of electromagnetic sensing devices. The shot volume can thus be held at the optimum value at which minimum flash occurs and complete filling of the mould is assured.