Apparatus for forming concrete blocks or stones with a rough...

Plastic article or earthenware shaping or treating: apparatus – Preform severing means – Means forming from bulk and downstream severing means

Reexamination Certificate

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Details

C425S289000, C425S412000, C425S422000, C425S444000, C249S112000, C249S117000, C249S140000, C264S162000, C264S163000

Reexamination Certificate

active

07021919

ABSTRACT:
A mold for forming blocks with at least one textured surface, the mold comprising a structure defining a cavity open at opposite ends thereof for receiving a block forming material at one of the open ends and discharging a block formed from the block forming material at the other of the open ends; and a continuous web surrounding at least a portion of the structure and movable relative to the structure for acting on the block forming material received within the cavity to impart a texture to a surface of the block, the web being mounted to move around the portion of the structure when the block is discharged from the cavity.

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patent: 2003/0164574 (2003-09-01), Hammer et al.

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