Calender hood
AssigneeAbitibi-Price Corporation
InventorsJake Zwart, Derek A. Twitchen
Life of this patent
Estimating the term…
Abstract
A calender hood for a paper machine having a dryer section and a calender section the hood extending along a portion of the paper path from the dryer section through the calender section to restrict movement of the ambient air into the region between the surface of the paper sheet and the calender hood and thereby reduce heat losses to the ambient air by the paper sheet.
Claims13
In a paper machine having a dryer section and a calender section for a paper sheet to pass therebetween during manufacture, a calender hood comprising a substantially air impervious barrier located near the paper sheet, continuously and uninterruptedly extending from the dryer section to the calender section and containing at least a portion of the calender section to restrict movement of the ambient air into the region between the calender hood and a surface of the paper sheet during passage of said paper sheet from the drying section to the calender section.
A method of reducing heat loss from a paper sheet in a paper machine having a dryer section and a calender section for a paper sheet to pass therebetween during manufacture, the method comprising positioning a substantially air impervious barrier as a calender hood near the paper sheet, continuously and uninterruptedly extending from the dryer section to the calender section and containing at least a portion of the calender section to restrict movement of the ambient air into the region between the calender hood and a surface of the paper sheet during passage of said paper sheet between said dryer section and said calender section.
Dependencies are inferred from the claim text.