Specially developed for the production of high pressure filters. The filters standing on their inserted plates are fed to the machine. Transport is effected by a heavy duty indexing drive feeding the filters precisely to the individual stations for processing. After being pneumatically fed into the pocket of the transport star wheel the lid edge is oiled automatically and the filter is indexed to the pressing station in which the lid is pressed into the pot. Simultaneously oiling of plate and thread is effected. After pressing is completed the filter is indexed to the seaming station in which the seaming operation is performed by the high speed seaming lever bracket rotating around the still standing filter. During this operation the filter wall is bended in L-shape by means of the cam controlled seaming rollers.