A NEW FILTER FOR CUTTING AND LUBRICATING OILS

A new filter of interest to all users of cutting oils has been developed and manufactured by Par‐Tool Engineering Co., Ltd., Filtration Division, Luton, Beds. This filter employs the depth type principle of filtration with a throw away cartridge of porous material. The cartridge has a cylindrical bore and the fluid flows from outside to inside. By arranging several concentric layers of differing pore size, the fluid meets increasing density on it's passage through the cartridge. In this way the total wall thickness is utilised efficiently.