Method of and apparatus in a filter tipping machine for manipulating in a web
First Claim
1. A method of subdividing an elongated web into a succession of discrete web portions, comprising the step of subjecting successive spaced-apart transversely extending linear zones of the web to the action of discrete short-lasting flashes of linear coherent radiation to thus sever discrete portions from the web.
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Abstract
A running web of tipping paper (one side of which is coated with a film of adhesive) in a filter cigarette making machine is subdivided into discrete uniting bands and/or is perforated by resorting to a single source or to two discrete sources of coherent radiation. Each source is associated with a control unit which initiates the emission of short-lasting flashes of coherent radiation. Such radiation is caused to impinge upon a diffractive focusing lens which focuses coherent radiation upon one or more masks having openings for coherent radiation which is to sever the web along transversely extending linear zones and/or to provide the web with desired arrays of perforations. The perforations permit atmospheric air to enter the column of tobacco smoke in a filter cigarette wherein the tobacco-containing portion and the filter mouthpiece are united by a perforated adhesive-coated uniting band.
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Citations
13 Claims
- 1. A method of subdividing an elongated web into a succession of discrete web portions, comprising the step of subjecting successive spaced-apart transversely extending linear zones of the web to the action of discrete short-lasting flashes of linear coherent radiation to thus sever discrete portions from the web.
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12. A method of subdividing an elongated web into a succession of discrete web portions, comprising the steps of propagating discrete short-lasting flashes of linear coherent radiation;
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diffracting said discrete flashes of radiation into a linear beam perpendicular to the propagation of the coherent radiation; and
directing said linear beam formed from the discrete flashes against spaced-apart transversely extended linear zones of the web thereby severing discrete portions from the web. - View Dependent Claims (13)
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Specification