Spiral pipe machine

Details Spiral pipe machine Spiral pipe machine

2006-04-05

2008-11-18

Banks, Derris H. (Department: 3725)

Metal deforming

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

To form helically-seamed tube

C072S145000

Reexamination Certificate

active

07451629

ABSTRACT:
A spiral pipe machine includes a feeding assembly for continuously feeding a web of material, and a forming assembly for accepting the web. The forming assembly bends the web to form a first section of a spiral pipe having a first predetermined diameter. A controller is employed for selectively instructing the forming means to change its configuration so as to give a second section of the spiral pipe a second predetermined diameter. The controller is capable of controlling the forming station to transition from the first predetermined diameter to the second predetermined diameter during the continuous feeding of the web.

REFERENCES:
patent: 3677046 (1972-07-01), Carroll
patent: 3940962 (1976-03-01), Davis
patent: 6339945 (2002-01-01), Miller et al.
patent: 6561228 (2003-05-01), Lennartsson
patent: 7137281 (2006-11-01), McCorvey

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