Libbey-Owens-Ford Co.

Gary A Smith

Robert G Revells

Allan T Enk

Jennifer R Wolfe

Robert L Livingston

A closed loop control system for a hydraulically actuated glass sheet press bending platen. Flow of fluid supplied to the cylinder operating the press platen is controlled through a servo solenoid valve. A linear motion transducer associated with the platen and sends appropriate signals to a programmable motion controller. The motion controller controls a position module operatively coupled to a servo solenoid valve which regulates the flow of hydraulic fluid from a pump to the cylinder. The motion controller utilizes data from the linear motion transducer for making necessary corrections to insure that the platen cycles precisely in accordance with a predetermined program. In a second embodiment of the invention, the closed loop control system for the hydraulically operated platen is combined with a precision control of a variable speed glass sheet conveyor means for improved registry of the glass sheet being bent with the platen member.

Control system for glass bending platen

Foot operated lawn mower starter

A transparent substrate is coated with consecutive layers of chromium, chromium oxides, and a metal oxide, thereby producing a transparent article having low visible light transmittance and low film side reflectance, which is particularly useful as an automotive or architectural solar control glazing.

Growing community of inventors

Maumee, OH, United States of America

Gary A Smith