PARQUET BLOCK WITH COAT Russian patent published in 2001 - IPC

FIELD: construction, in particular, manufacture of parquet blocks. SUBSTANCE: parquet block with a laminar coat comprises plane-parallel rectangular and longitudinal and lateral cavities located in height of the block for correlation and overlap of slots at assembly of the parquet board. The slots and projections are made with a reverse gradient, and their dimension in height does not coincide. The slot cross-section area exceeds the cross-section area of projection for placement of the laminar coat by 1 to 12%. The parameter of elevation of the rectangular base above the cavities and projections concerning to the total area of the block is 1 to 1.9, less the thickness of the laminar coat. EFFECT: enhanced safety to wet penetration of boards from parquet blocks. 7 dwg