The present invention relates to a method of controlling the position of cigarette filter paper.
As is known, in the manufacture of filter-tipped cigarettes, following formation of the actual cigarette consisting of normally white paper wrapped about the tobacco, a filter is positioned by way of an extension of the cigarette, and is joined to the cigarette by applying a connecting strip of normally yellow paper (known as "tipping" or "filter paper"). More specifically, the filter paper presents adhesive portions, and is wound about the filter material so as to slightly overlap the cigarette paper and so secure the filter to the cigarette.
When applying the filter paper, however, this is sometimes positioned incorrectly in relation to the actual cigarette portion in the sense that the joining line between the cigarette and the filter is either crooked, or higher or lower than it should be.
As a result, a check must be made to control and indicate any errors in the position of the filter paper in relation to the cigarette.