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:
May. 05, 1987
Filed:
Aug. 22, 1986
Applicant:
Inventors:
Assignee:
Emhart Industries, Inc., Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
65 29 ; 65 76 ; 65 83 ; 65160 ; 65163 ;
Abstract
A plunger mechanism for use in forming a gob of molten glass into a parison comprises a cylinder (30), a piston (32) movable in the cylinder upon the introduction of hydraulic fluid, a piston rod (34), means (40) for mounting a plunger on the piston rod, a servo-mechanism (58) to control the flow of fluid, a position or velocity feedback device (60), and control means (70) responsive to the feedback device operable to control the servo-mechanism so that the plunger moves with a predetermined position against time curve.