Abstract: The present invention relates to a pot-shaped permanent filter insert for use in an espresso machine, the insert comprising a filter base plate which substantially forms the bottom of the pot and is penetrated by a plurality of filter openings substantially in the flow direction of the medium to be filtered and comprises a frame surrounding the filter base plate, and a pot wall which is substantially arranged on the edge of the filter base plate and transversely extends away from the filter base plate to form a coffee receiving portion, the permanent filter insert being made of a plurality of parts in that the lower edge portion of the pot wall is substantially secured to the outer edge of the filter base plate. Furthermore, the lower edge portion of the pot wall and the filter base plate are interconnected by an injection-molded plastic connection, a frame being injection-molded substantially around the outer edge of the filter base plate, interconnecting the frame and the filter base plate and the pot wall.

Abstract: A sieve sheet having radially extending separating slots in order to subdivide the area of the sieve sheet into sieve segments. The separating slots are embedded with plastics material. The sieve segments may be arranged in a configuration differing slightly from a plane, thus stiffening the sieve.

Abstract: 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.