Improvements in filter maker machines
Publication Date: 2015-Jul-16
The IP.com Prior Art Database
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 ...