Profile: William Birch ( Machinery ) Ltd. specializes in building services, heating, ventilation, structural steelwork, process pipework and engineering services for the construction, pharmaceutical & utilities markets. We provide inspection and examination EX 14, which allows mending, examination or inspection. All types of material successfully processed. Choice of input-roll, pile, 'A' frame, bale. It contains sloping or flat table with or without illumination. The birch slitting machine can work at high speed with multiple slits, it can also be used with heat sealing knives.