Apparatus for Helically Fluting or Corrugating Tubes.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Apparatus for Helically Fluting or Corrugating Tubes.
I, ISAIAH REES, of The Mannesmann Tube Company Limited, of Landore,
South Wales, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus whereby tubes are helically fluted or corru-
gated so as to present either Hats or ridges and furrows extending helically along
For this purpose there is mounted within a casing a die consisting of a disc
of some thickness which has cut centrally through it a hole having the same form
as the transverse section which the tube is to have when it is fluted or corrugated.
The hole has its sides somewhat inclined to the plane of the disc, being more or
less inclined according as the pitch of the helix to be formed on the tube is less or
greater. The disc is free to revolve within the casing and in order to lessen friction
it is preferably arranged to take its bearing on balls or rollers in front of it.
The casing which has in front of it a trumpet mouthed guide for the tube, is
fixed on a draw bench, and the tube, is drawn through the die, which, owing to the
inclination of the sides of its hole, is caused to revolve producing on the tube a
helical fluting or corrugation of shape determined by the polygonal or star shaped
form of the hole in the die and of pitch determined by the inclination of the sides
of the hole.
Dated this 2nd day of April 1896.
ABEL & IMRAY,
Agents for the Applicant.
Apparatus for Helically Fluting or Corrugating Tubes.
I, ISAIAH REES, of The Mannesmann Tube Company Limited, of Landore,
South Wales, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
This invention relates to apparatus whereby tubes are helically fluted or corru-
gated so as to present either flats or ridges and furrows extending helically along
them.
For this purpose, as shewn in front view Fig. 1 and in section Fig. 2 of the
accompanying drawing, there is mounted within a casing A a die consisting of a
disc B of some thickness which has cut centrally through it a hole having the
hexagonal or other form of the transverse section which the tube is to have when
it is fluted or corrugated.
The hole has its sides inclined to the plane of the disc, being more or less
inclined according as the pitch of the helix to be formed on the tube is greater or

page_text: less. The disc B is free to revolve within the casing A and in order to lessen
friction it is preferably arranged to take its bearing on balls C or rollers in front
of it. The casing A which has in front of it a guide for the tube to be fluted is
fixed on a draw bench, and the tube is drawn through the die, which, owing to the
inclination of the sides of its hole, is caused to revolve producing on the tube a
helical fluting or corrugation of shape determined by the polygonal or star shaped
form of the hole in the die and of pitch determined by the inclination-of-the-sides
of the hole..
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
Apparatus for helically fluting or corrugating tubes constructed and operating
substantially as described.
Dated this 31st day of December 1896
ABEL & IMRAY,
Agents for the Applicant.