Process and Means for the Manufacture of Pressed Corrugated Tubes for Steam Boilers and the like.
Year: 1898

page_text: Date of Application, 10th Nov., 1898
Complete Specification Left, 3rd Aug., 1899-Accepted, 30th Sept., 1899
PROVISIONAL SPECIFICATION.
Process and Means for the Manufacture of Pressed Corrugated Tubes
for Steam Boilers and the like.
I, KONRAD GAMPER, of Sielce, near Sosnovice, Russia, Manufacturer, do hereby
declare the nature of this invention to be as follows: -
This invention consists in a process and means for manufacturing corrugated
tubes for steam boilers and the like as I will describe with reference to the
accompanying drawing which shews by way of example at Fig. 1 a longitudinal
section and at Fig. 2 a cross section at x-y of an ordinary hydraulic or other
pressing apparatus (ABCDEFG) for carrying out the said method of manu-
facture.
The ends of the welded red hot iron tube M to be pressed are clamped and
tightened into the two press-platens F and G. Divided profile-rings n which can
readily be locked up, are arranged in suitable number at a certain distance from
each other upon the tube in the longitudinal direction between the two press-
platens, and the heated tube is put into these rings. The process consists in
producing, by means of the hydraulic press a pressure in the axial direction of
the tube, whilst at the same time the walls of the tube are subjected to internal
pressure by means of gases or vapours of high tension, which consequently effect
the outward bulging of the tube against the rings n and thereby form corruga-
tions thereon corresponding to the configuration of the rings.
The number and form of the corrugations depend upon the number, profile and
distance of the rings. The axial pressure prevents during the action of the
internal pressure the extension and weakening of the material of the tube-walls,
as the press-platens will follow up the shortening of the tube produced by the
formation of the currugations.
If the ends of the tube to be pressed were rigidly held or if the corrugations
were produced by mechanical means, the thickness of the tube-walls unavoidably
would be reduced.
Moreover by the improved process the weld-seams are not exposed to any injury
Metallic hollow bodies of any cross section can be pressed according to this
process into any desired outer shape.
Dated this 10th day of November 1898.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Process and Means for the Manufacture of Pressed Corrugated Tubes
for Steam Boilers and the like.
I, KONRAD GAMPER, of Sielce, near Sosnovice, Russia, Manufacturer, do hereby
declare the nature of this invention and in what manner the same is to be per-
[Price 8d.]
Process and Means for the Manufacture of Pressed Corrugated Tubes
for Steam Boilers and the like.
I, KONRAD GAMPER, of Sielce, near Sosnovice, Russia, Manufacturer, do hereby
declare the nature of this invention and in what manner the same is to be per-
[Price 8d.]

page_text: formed, to be particularly described and ascertained in and by the following
statement:-
This invention consists in a process and means for manufacturing corrugated
tubes for steam boilers and the like as I will describe with reference to the draw-
ing accompanying my Provisional Specification, which shews by way of example
at Fig. 1 a longitudinal section and at Fig. 2 a cross section at y of Fig. 1
of an ordinary hydraulic or other pressing apparatus (ABCDEFG) for carry-
ing out the said method of manufacture.
The ends of the welded red hot iron tube M to be pressed are clamped and
tightened into the two press-plattens F and G. Divided profile-rings n are
arranged in suitable number at a certain distance from each other upon the tube
in the longitudinal direction between the two press-plattens, and the heated tube
is put into these rings. The process consists in producing, by means of the
hydraulic press, a pressure in the axial direction of the tube, whilst at the same
time the walls of the tube are subjected to internal pressure by means of gases
or vapours of high tension, which consequently effect the outward bulging of the
tube against the rings n and thereby form corrugations thereon corresponding to
the configuration of the rings.
The number and form of the corrugations depend upon the number, profile and
distance of the rings. The axial pressure prevents during the action of the
internal pressure the extension and weakening of the material of the tube-walls,
as the press-plattens follow up the shortening of the tube produced by the forma-
tion of the corrugations.
If the ends of the tube to be pressed were rigidly held or if the corrugations
were produced by mechanical means, the thickness of the tube-walls would
unavoidably be reduced.
Moreover the improved process the weld-seams are not exposed to any
injury. Metallic hollow bodies of any cross section can be pressed according to
this process into any desired outer shape.
Pipes at a supply the interior of the tube M with steam or other fluid under
pressure. Three pipes are shown so that fluids at different pressures can be
supplied. In like manner three inlets 6 are shewn to the hydraulic cylinder so
that fluids at different pressures may be employed as required.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is:-
The herein described process for corrugating heated tubes by subjecting them
to internal fluid pressure and at the same time compressing them lengthwise, for
the purpose set forth.
D
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1000