Laser piercing apparatus for moving web material

Details Laser piercing apparatus for moving web material Laser piercing apparatus for moving web material

1998-05-26

2000-04-11

Mills, Gregory

Electric heating

Metal heating

By arc

21912176, B23K 2600

Patent

active

060490578

ABSTRACT:
A piercing apparatus includes a traveling unit for causing a tip paper to travel at a predetermined speed along a traveling path, a plurality of laser piercing heads for irradiating pulsed laser beams onto plural positions which are spaced apart from one another on the traveling path, and a controller for pulse-driving laser oscillators of the laser piercing heads in a manner synchronized with one another at time intervals of a period which varies depending on the tip paper traveling speed, whereby minute holes of a desired size are stably formed with a desired spacing in the tip paper which travels at a high speed. The controller variably adjusts the spacing with which minute holes are formed, by controlling the timings at which drive pulses are supplied to the respective laser piercing heads.

REFERENCES:
patent: 4297559 (1981-10-01), Whitman, III
patent: 4672168 (1987-06-01), Saunders et al.
patent: 4947023 (1990-08-01), Minamida et al.
patent: 5341824 (1994-08-01), Fletcher et al.

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