I worked for S H Johnson & Co Ltd in the late fifties. They made filter presses for many different industries. British Sugar and I C I bought a lot of them. Boake Roberts was a neighbour in Carpenters Road, Stratford, East London and they used the filter presses for chemical processing. They must have sold all over the world as the ones in the top picture turned up in Australia.
The frames were cast in the foundry which looked like a scene out of the 19th century. They also made the filter cloths but the rubber gaskets were made by Northern Rubber in Retford. The works backed up to the river Lea. This is a picture of the area
