Method of making a consolidated cellulosic article having protrusions and indentations
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United States of America Patent
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Jun 17, 2003
Grant Date -
N/A
app pub date -
May 19, 2000
filing date -
May 19, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A consolidated cellulosic article of increased thickness and target face density, as well as an apparatus and method of manufacturing same, are disclosed. The apparatus includes first and second dies adapted to move toward on e another with a mat of cellulosic material and a binding agent therebetween. When the dies move together, the mat is compressed under pressure and heat with forms on one of the dies forming identations in the mat. Compression zones of increased density form between the indentations and a first face of the mat. By spacing the forms appropriately, the compression zones overlap, and the face of the resulting consolidated board is provided with substantially uniform density. Since the entire board is not compressed to the same degree, its overall thickness is enchanced while the density of the first face of the mat is increased, and relatively little material is used.
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