04237778 is referenced by 4 patents and cites 8 patents.

A continuous filter rod which can be severed to yield recessed composite filter mouthpieces is obtained by feeding groups of assorted dissimilar coaxial filter plugs onto the adhesive-coated side of a running web of wrapping material and inserting a phantom plug of selected length between each previously transferred group and the next-following group to insure that the width of gaps between neighboring groups matches the length of the phantom plug. The phantom plug is withdrawn as soon as the next-following group adheres to the web, and the web is draped around the resulting filler to form therewith a continuous filter rod wherein groups of dissimilar filter plugs alternate with gaps. When the filter rod is severed centrally across a gap, the adjacent portions of the filter rod constitute two recessed filter mouthpieces. Each gap is flanked by plugs consisting of identical filter material.

Title
Machine for making recessed composite filter mouthpieces
Application Number
6/16528
Publication Number
4237778
Application Date
March 1, 1979
Publication Date
December 9, 1980
Inventor
Wolfgang Wiese
Hamwarde
DE
Erich Berger
Hamburg
DE
Nikolaus Hausler
Oststeinbek
DE
Agent
Peter K Kontler
Assignee
Hauni Werke Korber & Co KG
DE
IPC
A24C 5/50
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