Method of and apparatus for manufacturing tube having holes

Electric heating – Metal heating – By arc

Patent

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Details

21912171, 21912182, B23K 2600

Patent

active

050269658

ABSTRACT:
It is an object of the present invention to provide a tube with precise holes. The side of a tube is drilled at predetermined intervals by a laser beam while the tube is being conveyed in its longitudinal direction in a tubular state. In consequence, manufacture is facilitated, and the precise holes can be drilled.

REFERENCES:
patent: 4028525 (1977-06-01), Mominee et al.

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