Glass manufacturing – Control responsive to condition sensing means – Glass working fluid or treating fluid control
Patent
1975-03-19
1976-04-27
Kellogg, Arthur D.
Glass manufacturing
Control responsive to condition sensing means
Glass working fluid or treating fluid control
65 81, 65318, C03B 1116
Patent
active
039531872
ABSTRACT:
A control system for operating the ram vertically movable in and out of a glass mold. The control system for operating the ram includes a hydraulic pump, a hydraulic fluid reservoir, and a hydraulic cylinder which is interconnected to the pump and to the reservoir. A vertically reciprocal piston is positioned in the cylinder. Valve means control the flow of hydraulic fluid from the pump and reservoir to the chambers defined on opposite sides of the piston. The operating system includes a first control of hydraulic fluid and fluid pressure to the first chamber and from the second chamber for rapidly lowering or permitting free fall of the ram towards the mold by action of gravity and a second control means of the fluid pressure on both sides of the piston to reduce the speed of the ram to pressing speed and finally to a fixed pressing position. The system also includes further controls for gradually breaking the ram away from the mold at a relatively slow speed and for controlling the flow of fluid and the pressure in the two chambers to rapidly raise the ram.
REFERENCES:
patent: 3337325 (1967-08-01), Bittner et al.
patent: 3634060 (1972-01-01), Dahlman et al.
patent: 3762906 (1973-10-01), Dahlman et al.
Kellogg Arthur D.
Lynch Corporation
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