Patent ID: 6634617
Filing Date: 2003-10-21
Classification: B28B,E04G

Abstract:
A system to produce a surface of cementitious material including a plurality of adjacent surface areas to simulate the appearance of natural stone or rock formed without seams visible between adjacent surface areas comprising at least two form liners and a plurality of keystone liner inserts wherein each said form liner comprises a mold including an obverse relief surface having an outer irregular peripheral edge including a plurality of peripheral projections having an irregular edge interrupted by a plurality of outer recesses having an irregular shape and a plurality of interior relief forming pockets wherein corresponding outer recesses of adjacent form liners are operatively aligned to engage adjacent edges therein to form a cavity having an irregular shape formed by said irregular shape of said corresponding outer recesses to selectively receive one of said keystone liner inserts having an irregular contoured pocket therein and including an outer irregular peripheral edge corresponding to said irregular shape of said corresponding cavity wherein said keystone liner inserts extend across adjacent form liners such that cementitious material poured into said plurality of interior relief forming pockets and said irregular contoured pockets form a simulated stone wall having an irregular seam formed between adjacent form liners to disguise the seam formed between adjacent surface areas as grout lines.