or lid is secured to the housing by a course of threads which can be produced without forming any undercuts this is achieved inside an area around the mold parting plane by providing recesses on the course of threads in the horizontal areas as a result the thread can be produced directly on the housing by the initial molding technique without any post molding processing measures so that manufacturing costs are reduced application_number US 29180402 A description 0030 fig1 is a cross section through a liquid filter for the lubricating oil of an internal combustion engine this filter comprises a housing 10 which is sealed by a lid 11 a filter cartridge 12 through which the oil flows from the outside toward the inside is installed in the housing the flow of the liquid within the housing is indicated by arrows the liquid flows from an inlet 13 through the filter cartridge to an outlet 14 configured as a connection piece 15 onto which the filter cartridge is placed the filter cartridge 12 is held and sealed by the screwed on lid 11 an axially and radially effective seal 16 configured as a molded sealing element seals the lid relative to the housing in addition an o ring is installed as an oil control ring 17 in the gap between housing 10 and lid 11 the.