Filtration device for foodstuff, oil and liquid e.g. water, comprises polygonal or rectangular draff frame that is bonded by several shanks, so that the bond forms a corner of the draff frame, and filter plate surrounded by the draff frame

摘要

The filtration device comprises a polygonal or rectangular draff frame that is bonded by several shanks, so that the bond forms a corner of the draff frame, and a filter plate surrounded by the draff frame, where the ends of the two adjacent shanks of the draff frame are bonded by laser welding and are turned to each other. The bonds are formed as butt joint. The filter plate has a layer structure, where the welding joint area is laser-smoothed.