Method and apparatus for compiling groups of filter segments when producing multi-segment filter asemblies

Abstract

A method of making segmented filters including moving substantially identical segments of one type at uniform rate to a transferring element, which places each segment separately on an exit path. Setting of the filter segments in a repeating group on the exit path is accomplished by delay in collecting segments by a transferring element in each module of the apparatus. Uniform positioning is effected using the transferring element which includes uniformly spaced drivers, and non-uniform positioning is effected using the transferring element with non-uniformly spaced drivers. The apparatus includes a guiding element positioned adjacent to a cutting drum and has a wall closing a channel for a set of segments drawn out of a flute on the drum. The filter set is led through the channel with the aid of a dog of a chain and is advanced by a worm surface of a pushing together drum. A separator positioned at the end of the channel which separates single filter segments and may be a disc cam pushing out the segment onto the transferring element between two neighbouring drivers into a chamber created by a supporting element. A stream of compressed air from nozzle directed towards the area between a shoe guide and separator helps separate and stabilize the filter segment.