Manufacture of a sieve having substantially plane sieve sheets

摘要

The invention relates to a method of manufacturing a sieve which is composed of several planar sieve sheet sections, which are lying adjacent each other and are separated by a plurality of slots and are communicating with one another at a common point. The sieve sheet sections when so arranged are placed into a mold, and thereafter plastics material is introduced into the mold to form ribs that are covering the slots and that are holding in place and stiffening the rims of the sections that form a slot. The sieve sheet may be formed as an integral part or alternatively may be made of several sieve sheet sections that are held together at the peripheral region by connecting means. The plastics ribs covering the slots may be integrally formed with a container holding the sieve sheet.