Heating device for corrugated paperboard production

Details Heating device for corrugated paperboard production Heating device for corrugated paperboard production

1994-08-18

1996-02-27

Hoang, Tu

Electric heating

Heating devices

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

165 87, 156470, F27B 906

Patent

active

054950929

ABSTRACT:
A hot plate for a double racer used in the manufacture of corrugated paperboard includes a substantially all copper construction which enhances thermal conductivity and heat transfer efficiency. Steam for heating the plates is provided through an array of copper tubes extending between manifolds on opposite sides of the hot plate, all in a manner which obviates the need for heavy pressure vessel construction. The hot plate is allowed to float on its supporting frame in a manner which accommodates lateral thermal expansion, and the lateral ends are tied vertically to the supporting frame to prevent thermal bowing characteristic of prior art systems. The heating system is also applicable to a rotary preheating drum where the same benefits of thermal conductivity and heat transfer efficiency are attained. In addition, a rapid cooling system in which pressurized cooling water is supplied directly to the copper heat tubes is disclosed for use in either the double facer hot plate embodiment or the rotary preheating drum embodiment.

REFERENCES:
patent: 3175300 (1965-03-01), Nitchie
patent: 3982758 (1976-09-01), Thayer et al.
patent: 4479048 (1984-10-01), Kinoshita
patent: 5156714 (1992-10-01), Thomas
patent: 5183525 (1993-02-01), Thomas
patent: 5244518 (1993-09-01), Krayenhagen et al.

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