WOOD-CHIP BOARDS

• US 3,846,219 A
• Filed: 08/07/1972
• Issued: 11/05/1974
• Est. Priority Date: 06/24/1970
• Status: Expired due to Term

• Current Assignee: Kunz A
• Original Assignee: Kunz A
• Inventors: KUNZ A
• Application Number:
  US05/279,052
• Time in Patent Office: 820 Days
• US Class Current: 428/165
• CPC Class Codes: B27N 3/06 Making particle boards or fibreboards, with preformed covering layers, the particles or fibres being compressed with the layers to a board in one single pressing operation
• CPC Class Codes: B27N 3/18 Auxiliary operations, e.g. preheating, humidifying, cutting-off
• CPC Class Codes: B27N 7/005 Coating boards, e.g. with a finishing or decorating layer
• CPC Class Codes: B32B 21/02 the layer being formed of fibres, chips, or particles , e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
• CPC Class Codes: B32B 21/042 of wood B32B21/13 takes precedence
• CPC Class Codes: B32B 21/06 of paper or cardboard
• CPC Class Codes: B32B 2451/00 Decorative or ornamental articles wall paper B32B2607/02
• CPC Class Codes: B32B 3/30 characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: Y10T 156/1041 Subsequent to lamination
• CPC Class Codes: Y10T 428/24537 Parallel ribs and/or grooves
• CPC Class Codes: Y10T 428/24554 including cellulosic or natural rubber component
• CPC Class Codes: Y10T 428/24934 including paper layer
• CPC Class Codes: Y10T 428/253 Cellulosic [e.g., wood, paper, cork, rayon, etc.]
• CPC Class Codes: Y10T 428/3196 Phenoplast

Abstract

1. A wood-chip board comprising a coarse chip innermost layer containing coarse wood chips having a lateral length of up to 10mm., and two external fine chip layers overlaying said coarse layer containing wooden fibers with a diameter of less than 0.1 mm. and exhibiting a fineness ratio of a least 1:50, the coarse chips and wooden fibers being glued with a curable resinous material, each external layer being overlaid with a decorative paper sheet impregnated with curable resinous material, and at least one of said decorative sheets and neighboring portions of the adjacent fine chip layer are together embosses and cured to yield a relief-like pattern, the depth of the relief extending into the adjacent fine chip layer to an extent which is greater than the thickness of the decorative layer.

Claims

1. A wood-chip board comprising a coarse chip innermost layer containing coarse wood chips having a lateral length of up to 10mm., and two external fine chip layers overlaying said coarse layer containing wooden fibers with a diameter of less than 0.1 mm. and exhibiting a fineness ratio of a least 1:

50, the coarse chips and wooden fibers being glued with a curable resinous material, each external layer being overlaid with a decorative paper sheet impregnated with curable resinous material, and at least one of said decorative sheets and neighboring portions of the adjacent fine chip layer are together embosses and cured to yield a relief-like pattern, the depth of the relief extending into the adjacent fine chip layer to an extent which is greater than the thickness of the decorative layer.