Hard surface floor covering and method of manufacture

Claim 1

A SHEET TYPE COVERING PRODUCT COMPRISING A BASE, A WEAR LAYER, AND DECORATIVE MATERIALS INTERVENING BETWEEN THE BASE AND THE WEAR LAYER, THE DECORATIVE MATERIALS COMPRISING A SINGLE COAT OF RESIN MATERIAL APPLIED THROUGHOUT THE ENTIRE AREA OF THE BASE, PORTIONS OF SAID SINGLE COAT IN CERTAIN PATTERN AREAS BEING OF RELATIVELY SMALL THICKNESS AS COMPARED WITH OTHER PORTIONS IN INTERVENING PATTERN AREAS, SAID AREAS OF RELATIVELY SMALL THICKNESS BEING RELATIVELY NARROW AND COMPRISING A NETWORK OF VALLEY AREAS AND SAID INTERVENING PATTERN AREAS COMPRISING RELATIVELY BROAD ELEVATED LARD AREAS FORMED OF POROUS EXPANDED POLYVINYL CHLORIDE OF SUFFICIENT THICKNESS TO PROVIDE A PRONOUNCED RELIEF PATTERN EFFECT IN CONTRAST WITH THE VALLEY AREAS, AT LEAST SOME OF THE PATTERN AREAS OF ONE THICKNESS BEING PRINTED WITH A COLOR MATERIAL CONTRASTING WITH THE COLOR PATTERN AREAS OF DIFFERENT THICKNESS TO PROVIDE A CONTRASTING COLOR PATTERN EFFECT IN REGISTRY WITH THE RELIEF PATTERN EFFECT, THE WEAR LAYER COVERING ALL OF THE PATTERN AREAS AND BING AT LEAST AS THICK OVER THE VALLEY AREAS AS OVER THE LAND AREAS BUT NOT OF SUFFICIENT THICKNESS IN THE VALLEYS TO APPRECIABLY IMPAIR THE RELIEF PATTERN EFFECT, AND SAID WEAR LAYER COMPRISING TRANSPARENT POLYVINYL CHLORIDE RESIN SO THAT THE COLOR PATTERN EFFECT IS VISIBLE.