Electric heating – Metal heating – By arc
Patent
1998-05-26
2000-02-15
Evans, Geoffrey S.
Electric heating
Metal heating
By arc
131281, B23K 2600
Patent
active
060255722
ABSTRACT:
A piercing apparatus includes a laser oscillation head for irradiating a pulsed laser beam onto a tip paper which travels at a prescribed speed along a traveling path to form minute holes at spacial intervals in the tip paper, a camera for picking up a picture image of a minute hole formed in the tip paper, and a controller for feedback-controlling the drive of the laser oscillation head in accordance with the size of and the spacing between minute holes obtained by analyzing one or more picture images of minute holes, so that minute holes of a desired size are formed in the tip paper with a desired spacing, to provide the tip paper with a desired air permeability.
REFERENCES:
patent: 4297559 (1981-10-01), Whitman, III
patent: 5259401 (1993-11-01), Lange et al.
patent: 5341824 (1994-08-01), Fletcher et al.
Fukuchi Junichi
Imai Kiyoshi
Takatsu Michiaki
Evans Geoffrey S.
Japan Tobacco Inc.
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