Apparatus for making composite filter plugs
First Claim
1. In an apparatus for making composite filter plugs wherein a tubular wrapper surrounds several types of filter material, a combination comprising means for advancing a continuous web of wrapping material lengthwise along a predetermined path wherein one side of the web remains exposed;
- a first paster having means for applying adhesive to an intermediate portion of said one side of the web in a first portion of said path;
means for transferring filter rod sections of several types onto said one side of the web in a second portion of said path so that the sections abut against each other end-to-end and adhere to said intermediate portion of said one side of the web to form an elongated filler;
first sealer means for promoting the setting of adhesive in the region of said second portion of said path so as to reduce the likelihood of shifting of the abutting sections of said filler relative to said web;
a second paster having means for applying adhesive to one marginal portion of the web;
means for draping the web around said filler so that said one marginal portion contacts and is bonded to the other marginal portion of the web whereby the thus draped web constitutes the tubular wrapper of the resulting filter rod;
second sealer means for promoting the setting of adhesive which bonds said marginal portions; and
means for subdividing said rod into discrete filter plugs each of which contains at least a portion of a section of each of said several types.
1 Assignment
0 Petitions
Accused Products
Abstract
Apparatus for making composite filter plugs for cigarettes or the like has a garniture which transports a web of cigarette paper or the like past a transfer conveyor which deposits on the web groups of aligned filter rod sections of two or more different types so that the sections are disposed end-to-end and form a continuous filler. Those portions of the web which are contacted by the sections are coated with a wet adhesive or a heat-activatable adhesive to insure that the sections cannot be shifted relative to the web, and the adhesive is heated or cooled in the region of the transfer conveyor to promote rapid setting. One marginal portion of the web is coated with wet adhesive or heat-activatable adhesive upstream or downstream of the transfer conveyor, and the web thereupon passes through a wrapping mechanism which drapes the web around the filler so that the one marginal portion adheres to the other marginal portion and the web constitutes the tubular wrapper of a filter rod which is severed at regular intervals to yield filter plugs each of which contains at least a portion of each type of section. The adhesive which is applied by the second paster is heated or cooled downstream of the wrapping mechanism.
17 Citations
11 Claims
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1. In an apparatus for making composite filter plugs wherein a tubular wrapper surrounds several types of filter material, a combination comprising means for advancing a continuous web of wrapping material lengthwise along a predetermined path wherein one side of the web remains exposed;
- a first paster having means for applying adhesive to an intermediate portion of said one side of the web in a first portion of said path;
means for transferring filter rod sections of several types onto said one side of the web in a second portion of said path so that the sections abut against each other end-to-end and adhere to said intermediate portion of said one side of the web to form an elongated filler;
first sealer means for promoting the setting of adhesive in the region of said second portion of said path so as to reduce the likelihood of shifting of the abutting sections of said filler relative to said web;
a second paster having means for applying adhesive to one marginal portion of the web;
means for draping the web around said filler so that said one marginal portion contacts and is bonded to the other marginal portion of the web whereby the thus draped web constitutes the tubular wrapper of the resulting filter rod;
second sealer means for promoting the setting of adhesive which bonds said marginal portions; and
means for subdividing said rod into discrete filter plugs each of which contains at least a portion of a section of each of said several types. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a first paster having means for applying adhesive to an intermediate portion of said one side of the web in a first portion of said path;
Specification