Hard plastic mould for concrete sample cubes - has smooth surfaced walls reinforced by external ribs

摘要

The ribs pref. consist of alternate relatively high primary ribs (2) and relatively short secondary ribs (3) the zones (5) formed by the primary ribs bear alphanumerical characters and are closed by cover plates (6) which fall out under pressure and which opt. bear the same characters. Five contiguous edges pref. have fracture points forming a tear seam (7) at one end of which is a tear tab (8), with the first and fifth edge disposed in the same plane, and the second, third and fourth disposed in the same plane.