BigPatents India

A process of manufacturing composite filter stock (I4)rovided that includes several steps. In a first step, a paper carrier strip (SO) feeds along a conveyor (30). Along One edge of the carrier strip, the paper is folded back against itself. Fibrous filter segments (22) are then deposited on the carrying strip in spaced apart intervals. The spacing defines cavities (16) between adjacent filter segments. The carrier strip with the deposited filter segments is fed along a path (110) of travel into an elongated guide (26) or support chamÂber that substantially surrounds the circumference of the paÂper-enveloped segments (22) and which leaves a narrow fill opening (62)opposite an elongated paniculate filling openÂing (112) that is elongated in the direction of motion of the carrying strip. Suction or a vacuum is concurrently applied adjacent the narrow opening (62), the suction increasing a downward momentum of a gravity feed stream of particu-late matter (20) and concurrently vacuums away loose par-ticulate matter. The cavities are concurrently filled with the paniculate matter over a length (L) corresponding to a preÂdetermined path of travel of the carrying strip. The folded over edge (104) is then unfolded and adhered to seal the fill opening. The filter stock is then cut to length, the cutting beÂing registered to create discrete composite filter segments.