Method of forming and inserting filter elements in cup-shaped containers

摘要

A method of forming and inserting filter elements (F) into cup-shaped (C) containers comprises the steps of: a) folding a continuous web of filter material (30) into two adjacent plies (30') which have separable upper edges and are joined one to the other along a bottom fold line(30"); b) blanking the upper edges of the adjacent (30') plies into a scalloped pattern; c) inserting carrier mandrels (36) between the adjacent plies (30'); d) joining the adjacent plies (30') along seams extending transversely with respect to the bottom fold line (30") to form a series of collapsed frustoconical filter elements interconnected by scrap segments (42) and supported internally by the carrier mandrels (36); e) separating the filter elements (F) one from the other by blanking and removing the said scrap segments (42); f) transferring the filter elements (F) from the carrier mandrels into underlying cup-shaped containers (C) and g) securing the thus inserted filter elements to interior surfaces of the cup-shaped containers (C).