'A method for the production of trichterfoermigen filter one etching with an opening the aid of and apparatus for carrying out this method'

摘要

1. Process for the manufacture of funnel-shaped filter inserts with an easy-opening arrangement, for the preparation of brewed drinks, in which a strip (15) of filter material, after its withdrawal from a roll (5) of material, is continuously rotatively perforated at predetermined intervals, to produce the easy opening arrangements, is subsequently folded along its entire length, is then provided at predetermined intervals with stamped protuberances for attachment together, for example at a bottom edge and at a side edge (24, 23) of the filter inserts (25) and finally is severed so as to separate the filter inserts, characterised in that a second strip (16) of filter material is first guided congruently with the first strip (15) of filter material and is perforated together with it, the perforated filter material strips (15, 16) are subsequently pulled apart from one another, separately folded and separately provided with stamped protuberances and that they are then drawn congruently together again and jointly severed.