Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1978-09-20
1980-12-09
Schmidt, Frederick R.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264 401, 425145, 425149, B29C 306
Patent
active
042384311
ABSTRACT:
In a tablet press which includes a rotary disc provided with a plurality of dies and pistons engaging from below the dies, a filling wheel and a metering wheel arranged for a simultaneous rotation on the upper surface of the disc in the range of the dies, a vertically adjustable cam track on which the pistons ride, an electronic device for measuring pressing forces in the dies and control means for generating control impulses in response to the range of variations of the consecutive pressing forces, a method of producing uniform tablets by adjusting the rotary speed of the wheels according to the control pulses to minimize the variations of the pressing forces and subsequently adjusting the vertical position of the cam track and thus the weight of the tablets according to additional control pulses generated by comparing the average value of the measured compressing forces with a predetermined desired value.
REFERENCES:
patent: 2567052 (1951-09-01), Carruthers
patent: 3255716 (1966-06-01), Knoechel et al.
patent: 3734663 (1973-05-01), Holm
patent: 4121289 (1978-10-01), Stiel
Deusch Rudolf
Friedrichs Konrad
Hinzpeter Jurgen
Stuben Werner
Schmidt Frederick R.
Striker Michael J.
Wilhelm Fette GmbH
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