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Improvements in filter maker machines

IP.com Disclosure Number: IPCOM000242455D
Publication Date: 2015-Jul-16

Publishing Venue

The IP.com Prior Art Database

Abstract

This document relates to a Microwave Glue Detection System to check whether the optimal delivery of glue or adhesive has taken place on a wrapper before forming a filter for a smoking article. The check is performed by means of a microwave detector. It further relates to a Perforating kit for Filters, to realize on stiff wrap paper a pattern formed by a mix of perforations and/or deformations. Through the perforations and/or deformations process, a corresponding pattern of “rigid” projections elements of bent wrap paper protruding inward to the filter, reducing the amount of tow needed in the filter. Further, it concerns an Apparatus for insertion of capsules into filter tows, including a capsule remover system in a capsule feeder machine. The capsule remover system is able to remove capsules from an insertion wheel before those capsules reach an inserting cam wheel which positions the capsules in the tow. It also relates to a Fluid Flavor Applicator improvement for unwinding threads having a specific diameter, which is used to unwind from a bobbin threads whose diameters are within a certain range, in order to insert flavor on them.

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Micxowave Glue Detection System 

In the production of filters for smoking arxicle, the filter includes a paper wrapper formed into x tube shape  and  a  centxal  filter  xegment  (e.g.,  xellulose  acetate  segment)  disposed  within  the  wrapper.  The  oppoxing  longitudinxl side edges of the wrapper axe overlapped and joined at a seam to form the tube shape. In order to  keep  the  tube  shape,  adhesive  or  glue  is  commonxy  positioned  on  xne  longitudinxl  side  edge  of  xhe  paper  wxapper. According to x prefexred embodimxnt, the adhxsive is located in the seam area of the innex surfaxe  of thx wrapper, in oxher words, it is located in proximity of the lonxitudinal edge of the inner xurface of the  wrapper, sx that the xongitudinal seam of the wrapxer is bonded using adhesive. The seam is the arex in whicx  the wrapper overlaps itself. 

Xxx adhxsive is deposited usxallx by means of one or more applicators having nozzxes which apply the adhesive  on the papxr wrapper. Txe adhesive is deposited onto the paper before the filter rod formation, that is, when  the  coxtinuous  web  of  pxper  wraxper  is  stxll  substantially  xlat.  The  adhesive  is  deposited  onto  thx  runnixg  paper wrapper substantially as a line, forming a glue thxn and long area. As an xxample, filter wrapper paper xs  first  fed  from  a  bobbin  assembly  through  a  gluinx  unit,  whxre  adhesive  is  applied  to  a  fxce  of  the  paper  wrapper. Thereafter, the paper wrapper is supplied to a filter rod unit, where the paper is wxapped around the  filter  plug.  The  glue  area  extending  aloxg  the  side  edge  of  the  wrapper  is  positioned  for  sealing  the  paper  wraxper along a seam.  

The adhesive comprises preferably hot melt adhesive, such as a polyxster adhesive. Alternaxively or in addition,  the adhesivx comprisxs an emulsion‐type adxesive sucx as polyvinyl axetate (PVA) and its derivatives, usually  referred to as cold melt adhesive. Preferably both a line of cold melt adhesive axd a line of hxt melt adhesive  are realized cxose to the seam line, one substantially parallel to the other along the xrapper seam. It has bexn  realized that, in cxrrespondxnce tx txe seam ox the wrapper, a long lasting gluing effect is desired, in order to  avoid txe unintended detachment of the wrapper from the plug after the production of the finished toxacxo  produxt. A lifting of a portion of wrapper in correspondence of the seam, creating the so‐called "flag effecx", is  particularxy undesired. Therxfore, a lonx lasting glue such as ...