Patent ID: 7591447
Filing Date: 2009-09-22
Classification: B28B,E02D,E04B,E04C

Abstract:
1. A mold for making a small, medium, and large block having substantially the same depth but having different lengths, the mold comprising: a plurality of walls defining a first cavity for molding the large block, a second cavity for molding the medium block, and a third cavity for molding the small block, wherein the cavities are separated from each other by one or more of said walls, and wherein each cavity has at least two opposing inner surfaces that are adapted to form a roughened texture on adjacent surfaces of the blocks as the blocks are removed from the cavities; wherein the small, medium, and large blocks can be used together to construct a block wall; wherein the plurality of walls comprises opposed, first and second end walls, opposed, first and second side walls extending between respective ends of the end walls, a first divider wall extending between the first and second side walls and dividing the mold into a first mold portion comprising the first cavity and a second mold portion comprising the second and third cavities, and a second divider wall extending between the first end wall and the first divider wall and dividing the second mold portion into the second and third cavities; wherein each of said inner surfaces that is adapted to form a roughened texture on an adjacent block surface has a plurality of tapered projections extending therefrom, the projections being configured to contact adjacent surfaces of the blocks and form a roughened texture resembling a split block face thereon as the blocks are removed from the mold; wherein each of said inner surfaces that is adapted to form a roughened texture on an adjacent block surface comprises a plurality of grooves defining rows of projections and is characterized by a ratio of the projected area of the inner surface to the total projected area of the grooves being less than 2:1.