Single facer preheater
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 18, 2000
Issued Date -
N/A
app pub date -
Jun 26, 1998
filing date -
Apr 18, 1997
priority date (Note) -
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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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