Synthetic resin seamless tube with black portion(s) and through-

Details Synthetic resin seamless tube with black portion(s) and through- Synthetic resin seamless tube with black portion(s) and through-

1990-01-05

1993-01-26

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Unitary plural outlet means

Arranged in plural groups or rows

21912171, B23K 2600

Patent

active

051816598

ABSTRACT:
A tube having holes formed at precise positions is obtained by preparing a tube in which a substantially black synthetic resin film portion and a synthetic resin film portion substantially having a color other than black are formed alternately in its circumferential direction and then by drilling the black synthetic resin film portion by a laser beam.

REFERENCES:
patent: 3293652 (1966-12-01), Roshov
patent: 4028525 (1977-06-01), Mominee et al.
patent: 4181051 (1980-01-01), Drori
patent: 4857696 (1989-08-01), Tueusch et al.

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