GB202782A - Improvements in and relating to presses for pressing fish products and the like - Google Patents

Abstract

202,782. Voldnes, P. June 14, 1922. Fats and fatty oils, extracting by pressure.- Presses, especially adapted for treating fish offal, herring, codfish, livers, guano, and fish products generally, comprise a row of separate compartments 1<1> fitted with pistons 2 connected together and adapted to press the material while moving simultaneously in the same direction longitudinally of the row. The press shown comprises sidewalls 9 that are slidable in grooves 10 in top and bottom plates 4, 5 divided by partitions 1 into the compartments 1<1> symmetrically arranged on both sides of a central partition or partitions 2<1>. The pistons 2 are secured to and moved by the walls 9 which carry nuts 11 engaging screws 3 adapted to be rotated by the gearing shown so as to move all the pistons simultaneously to or from the partitions 2<1>. The direction of rotation of the screws is reversed automatically or by hand. The compartments 1<1> are filled through pipes 20, the residue is discharged through pipes 28, and the expressed oil passes through nets 25 and down vertical grooves in plates 24 to discharge pipes 26. During the pressing operation the pipes 20, 28 are closed by slides 30, 31 that are arranged in the top and bottom plates 4, 5 and are operated together. The material is heated by steam admitted through holes 23. In a modification, the pistons, partitions, and drain-plates are so arranged that pressure is exercised by half of the number of pistons on each side during movement in one direction and by the other half during the return movement, the fish is fed and discharged through hinged doors, and the screws are arranged above and below the press. This form of press may be built to operate vertically. In all forms the pistons may be operated hydraulically by attaching the hydraulic pistons to the ends of the side walls 9.