Metal tube and its production method

Details Metal tube and its production method Metal tube and its production method

2006-08-01

2006-08-01

Larson, Lowell A. (Department: 3725)

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form longitudinally-seamed tube

C072S368000, C072S405060

Reexamination Certificate

active

07082795

ABSTRACT:
A small diameter metal tube having at least two inner diameters is provided. A method for producing this metal tube is also provided. In this method, a plate member having a development shape of the metal tube is blanked from a metal thin plate so that the plate member is left partly tied to the metal thin plate, the plate member is press formed into a tubular body having the at least two inner diameters, and the plate member partly tied to the metal thin plate is cut apart to produce the metal tube having at least two inner diameters.

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