Rolls of controllable flexure, especially for machines for the p

Details Rolls of controllable flexure, especially for machines for the p Rolls of controllable flexure, especially for machines for the p

1979-08-24

1980-11-11

Flint, Jr., Howard J.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

425363, 425367, 425368, 29116AD, 165 26, B30B 1514, B30B 304, B29D 714

Patent

active

042330114

ABSTRACT:
A roll of controllable flexure having a cylindrical inner part and a tubular outer part surrounding the inner part and mounted rotatably at both its ends on the inner part. A heating strip is disposed along a generatrix on the inner part. At least one electrical temperature sensor is disposed in the inner part in the immediate vicinity of the heating strip and at least one additional electrical temperature sensor is disposed on the opposite side of the inner part. The two temperature sensors are connected to a temperature difference measuring apparatus and control an electrical regulating circuit to which a power circuit containing the heating strip is connected. The power delivered to the heating strip is so regulated that a preset temperature difference between the heated and unheated sides of the inner part is maintained. The different thermal elongation of the unheated and heated sides of the inner part produces an arching of the inner part which is transmitted to the outer part. The side of the inner part that faces away from the heating strip can be cooled.

REFERENCES:
patent: 2912556 (1959-11-01), Hold
patent: 3074695 (1963-01-01), Hold et al.
patent: 3313002 (1967-04-01), Wyeth
patent: 3328866 (1967-07-01), Robertson
patent: 3339228 (1967-09-01), Seanor et al.
patent: 3972671 (1976-08-01), Aspin
patent: 4000242 (1976-12-01), Hartbauer
patent: 4030177 (1977-06-01), Hold
patent: 4074624 (1978-02-01), Burnstad et al.
patent: 4124349 (1978-11-01), Lehmann

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