Cigarette manufacture
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 27, 1994
Grant Date -
N/A
app pub date -
Jun 5, 1992
filing date -
Jun 5, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In cigarette conveying apparatus cigarettes are conveyed along a path so that they are intercepted in sequence by beams directed at different portions of the path to produce a complete circumferential row of perforations on each cigarette after it has traversed the path. An incident laser beam (14) is time-shared to produce pulses for making perforations by mutually inclined rotatable discs (20, 28). A temperature sensor (150) is provided to detect build-up of contaminants on a lens or mirror (146) for a laser beam (32B). A stream of air containing small quantities of water is supplied by tubes (380,388) terminating in the region in which the cigarettes are perforated so as to assist removal of contaminants resulting from laser perforation.
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Family
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Cited Art Landscape
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