Single facer preheater

Details Single facer preheater Single facer preheater

1998-06-26

2000-04-18

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With bending, folding, winding, or wrapping means

156497, 156499, 34624, 34639, B31F 136, B31F 128

Patent

active

060503165

ABSTRACT:
A single facer including a preheater for conditioning a paperboard web. The preheater is positioned upstream form a corrugating nip and includes an arcuate surface facing the web. A plurality of primary channels are disposed internally within the preheater in thermal communication with the arcuate surface. High pressure steam is supplied to the primary channels for heating the arcuate surface. A plurality of outlet ports extend within the preheater and are in fluid communication with the heated arcuate surface. Low pressure steam is released through the plurality of outlet ports thereby producing a steam film between the heated arcuate surface and the paperboard web. The steam film dramatically increases heat transfer to the paperboard web while also reducing frictional forces opposing movement of the web.

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