Apparatus for making wafer blocks

摘要

Apparatus is provided which is used in combination with a machine for coating wafer sheets and serves to form wafer blocks built up in a downward direction. It is desired for avoiding damage to very large wafer sheets as they are assembled to form wafer blocks by means of helical conveyors, which rotate in mutually opposite senses about parallel axes and which move each wafer sheet into engagement with a stop and raise the wafer sheet from a first level to a second, higher level. This is accomplished in that each helical conveyor is provided with at least two helical wire flights, which extend parallel to each other around the axis of rotation of the conveyor. The helical flights of all helical conveyors define a common imaginary surface and support the wafer sheets on said surface. The novel apparatus as well as the wafer sheet coating machine is used in the industrial production of large wafer blocks, which constitute a starting product for the industrial manufacture of slices of wafer blocks.