Electric heating – Metal heating – By arc
Patent
1998-06-01
2000-05-16
Evans, Geoffrey S.
Electric heating
Metal heating
By arc
131281, 2191217, 21912177, B23K 2600
Patent
active
060640324
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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"LongLife Diffractive Focusing Lenses", Industrial Laser Optics & Accessories, Jun. 1992.
Dombek Manfred
Voss Helmut
Evans Geoffrey S.
Hauni Maschinenbau AG
Spencer George H.
Voorhees Catherine M.
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