Drier drum, in particular for papermaking machines

Details Drier drum, in particular for papermaking machines Drier drum, in particular for papermaking machines

1989-09-25

1991-02-05

Walberg, Teresa J.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

432228, B21B 2708, H05B 302

Patent

active

049907514

ABSTRACT:
A drier drum, in particular for papermaking machines, for textile machines and the like, comprises a drum cylinder, end flanges carrying the drum cylinder, a drive system mechanically coupled to at least one of the flanges to rotate it and heating means. The drum comprises a fixed refractory material cylindrical sleeve covered with a heat reflecting coating disposed coaxially inside the drum cylinder and heating means comprising main electrical heating elements of elongate shape adapted to be energized continuously during functioning thereof and profile correcting electrical heating elements of elongate shape adapted to be energized selectively. At least some of the main heating elements are longer than any of the profile correcting heating elements. The electrical heating elements are carried by the cylindrical sleeve.

REFERENCES:
patent: 1978081 (1934-10-01), Hanson
patent: 2571426 (1951-10-01), Doniak
patent: 2586829 (1952-02-01), Kelsey
patent: 3216489 (1965-11-01), Norton
patent: 3376407 (1968-04-01), Wagner
patent: 3624353 (1971-11-01), Bjorklund
patent: 3805020 (1974-04-01), Bates
patent: 4163892 (1979-08-01), Komatsu
patent: 4535230 (1985-08-01), Brieu
patent: 4560860 (1985-12-01), Fauser

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