Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1991-04-08
1992-08-25
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
100 47, 100 48, 100168, 100172, 264 406, 264175, 425141, 425143, 425367, B29C 4324, B29C 4346, B29C 4358
Patent
active
051416816
ABSTRACT:
A calender for producing packing sheets has a heated cylinder of large diameter and an unheated pressure cylinder of smaller diameter which is movable toward and away from the heated cylinder to vary the width of a gap between the cylinders. A plastic mixture plasticized by a solvent is fed to the gap between the cylinders and is formed into a sheet on the heated cylinder, where it is vulcanized. Two temperature sensors on a common support are positioned to measure the temperature of the outer surface of such sheet and transmit the temperature measurement to a procesor which is programmed to control operations of the calender. A further sensor measures the thickness of the sheet on the heated cylinder and the thickness measurement is transmitted to the processor as a further parameter in control of operation of the calender.
REFERENCES:
patent: 3074114 (1963-01-01), Petry
patent: 3182587 (1965-05-01), Woodhall
patent: 4639346 (1987-01-01), Pav et al.
Burns Robert E.
Lobato Emmanuel J.
Paul Troester Maschinenfabrik
Tentoni Leo B.
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