Presses – Automatic or material triggered control – Of roll separation or speed
Patent
1989-05-08
1991-02-12
Coe, Philip R.
Presses
Automatic or material triggered control
Of roll separation or speed
291162, 72245, 100162B, 100170, B30B 304, B30B 1516
Patent
active
049914995
ABSTRACT:
A roll arrangement comprises a hydraulically supported bottom roller having rotating hollow cylinder and a stationary crosshead extending lengthwise through the cylinder to form a clearance space therewith. The end of the crosshead are supported by force exerting devices. The forces producing the line pressure of the roll are transferred through a hydraulic supporting device, such as hydraulic fluid contained within a longitudinal pressure chamber in the crosshead, to the inner circumference of the hollow cylinder. When a quick release action is desired to separate the bottom roller from its counterroll, the pressure in the longitudinal chamber is suddenly lowered by opening a quick release valve connected to a return tank. A corresponding reduction of the pressure in the force exerting devices to permit separation of the rollers occurs only after a sensor, such as a dynamometer, has determined that the load on the crosshead has been substantially removed.
REFERENCES:
patent: 4357743 (1982-11-01), Hefter et al.
patent: 4472958 (1984-09-01), Biondetti
patent: 4721039 (1988-01-01), Lehmann
Coe Philip R.
Eduard Kusters Maschinenfabrik GmbH & Co KG
Gerrity Stephen F.
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