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US 6,364,982 B1Granted
Method of producing ribbed board and product thereof
OwnerSteven K. Lynch, Bei-Hong Liang +3inventors
InventorsSteven K. Lynch, Bei-Hong Liang, Frederick Frein, Karine A. Luetgert, Dennis J. Farrell
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Abstract
A method for the production of ribbed board product, such as fiberboard or flakeboard, which resists fracturing during manufacture. The ribbed board product made according to the invention can be used as decking in packaging components.
Claims12
A method of producing a ribbed board product, said method comprising the steps of:
- a) forming a mat comprising a material selected from the group consisting of wood-based materials, agricultural fibers, and synthetic fibers;
- b) providing the mat in a die, said die having a ribbed configuration with at least two spaced apart outer zones and at least two angled zones;
- c) closing the die to form a die gap, wherein the die gap at said at least two spaced apart outer zones differs from the die gap at said at least two angled zones;
- and wherein the die gap of each of said at least two spaced apart outer zones includes a cavity to provide low density areas on said at least two spaced part outer zones;
- and
- d) consolidating said mat under pressure and heat to form the ribbed board product having said low density areas on the outer zones.
3 more elements
Dependencies are inferred from the claim text.