Synthetic resin seamless tube with black portion(s) and through-holes therein
AssigneeMitsui Petrochemical Industries, Ltd.
InventorTatsuta Ohe
Life of this patent
Estimating the term…
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.
Claims5
A seamless tube having holes, said tube being made of a synthetic resin, said tube comprising a substantially black synthetic resin portion and a substantially white synthetic resin portion alternately spaced about the tube's circumference, and said substantially black synthetic resin portion has small through holes.
Dependencies are inferred from the claim text.