Improved Process and Means for the Manufacture of Corrugated Tubes.
Year: 1899

page_text: Date of Application, 9th Nov., 1899
Complete Specification Left, 29th Aug., 1900-Accepted, 29th Sept., 1900
PROVISIONAL SPECIFICATION.
Improved Process and Means for the Manufacture of Corrugated
Tubes.
1, CHARLES DENTON ABEL, of Birkbeck Bank Chambers, Southampton Build-
ings, in the County of London, Consulting Engineer, and Chartered Patent
Agent, do hereby declare the nature of this invention (as communicated to me
from abroad by Dampfkessel und Maschinenbau Actien Gesellschaft, W. Fitzner
& K. Gomper, in Sielce, near Sosnowice, Russia, Manufacturers), to be as
follows:-
This invention relates to a process for the manufacture of corrugated tubes
which was described in the Specification to Gampor's Application for Letters
Patent No. 23711 of 1898, wherein such corrugated tubes were produced by
the combined action of internal gaseous pressure and axial pressure. By the
combined action of these two pressures the tube, which was placed in a heated
condition in the apparatus was pressed into ring shaped moulds surrounding
the outside of the tube.
By this means a corrugated tube was produced without any weakening of
the sides, the axial pressure having the effect that the tube becomes shortened
in length in due proportion to the formation of the corrugations.
The present invention has for its object a further improvement on this pro-
cess by means of which the use of the ring shaped mould is dispensed with,
and consequently the apparatus is much simplified.
According to the present improvement the tube is introduced in a cold con-
dition into the apparatus and it is then heated by a special furnace at the
point where a corrugation is to be produced.
When the said part has become sufficiently heated the internal gaseous pres-
sure and the axial pressure are exerted as before, thereby producing the required
corrugation at the heated part.
On the accompanying drawing is shewn by way of example a construction
of apparatus for carrying out the invention; Fig. 1 shews a longitudinal section
and Fig. 2 a cross section of the apparatus, through the annular furnace.
The welded tube a to he corrugated is introduced cold between the plates b, d,
of a press having the same construction as that described in the said application
No. 23711 of 1898.
on
The plate is forced forward by means of a hydraulic press in proportion
as the shortening of the tube by the corrugating process proceeds. By means
of the pipe compressed air or steam can be introduced into the interior of the
tube. A ring shaped furnace of any suitable construction mounted
wheels, surrounds the tube and is shifted to the part thereof on which the
corrugation is to be made; by this means the said part, such as the annular
zone 1, 2, is heated to the required degree, whereupon the furnace is moved
to one side. The compressed air being then admitted to the tube a while at
the same time water pressure is admitted to the press, the zone 1, 2 will bo
bulged outward so as to form a corrugation. The height of such corrugation

page_text: will depend upon the extent of the stroke of the press, and its form upon the
width of the zone heated, the temperature to which it is raised, and the intensity
of the internal pressure.
By this means any desired number of corrugations of any desired form can
be produced upon a tube without the use of moulds.
On the drawing is shewn a ring shaped coke furnace e which is supplied
with air for combustion through pipes ; it is mounted with wheels upon
rails so as to be movable into any desired position between the plates of the
press. Instead of a coke furnace a gas furnace or the like, may be employed.
Dated this 9th day of November 1899.
ABEL & IMRAY,
Agents for the Applicant.
Improved Process and Means for the Manufacture of Corrugated
Tubes.
I, CHARLES DENTON ABEL, of Birkbeck Bank Chambers, Southampton Build-
ings, in the County of London, Consulting Engineer, and Chartered Patent
Agent, do hereby declare the nature of this invention (as communicated to me
from abroad by Dampfkessel und Maschinenbau Actien Gesellschaft, W. Fitzner
& K. Gamper, in Siclce, near Sosnowice, Russia, Manufacturers), 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 a process for the manufacture of corrugated tubes
which was described in the Specification No. 23711 of 1898, wherein such cor-
rugated tubes were produced by the combined action of internal gaseous pressure
and axial pressure. By the combined action of these two pressures the tube,
which was placed in a heated condition in the apparatus was pressed into ring
shaped moulds surrounding the outside of the tube.
By this means a corrugated tube was produced without any weakening of
the sides, the axial pressure having the effect that the tube becomes shortened
in length in due proportion to the formation of the corrugations.
The present invention has for its object a further improvement on this pro-
cess by means of which the use of the ring shaped mould is dispensed with,
and consequently the apparatus is much simplified.
According to the present improvement the tube is introduced in a cold con-
dition into the apparatus and it is then heated by a special furnace at the
point where a corrugation is to be produced.
When the said part has become sufficiently heated the internal gaseous pres-
sure and the axial pressure are exerted as before, thereby producing the required
corrugation at the heated part.
On the drawings accompanying the Provisional Specification is shown by
way of example a construction of apparatus for carrying out the invention;
Fig. 1 shews a longitudinal section and Fig. 2 a cross section of the apparatus,
through the annular furnace.
The welded tube a to be corrugated is introduced cold between the plates b, d,
of a press having the same construction as that described in the said Specification
No. 23711 of 1898.
The plate is forced forward by means of a hydraulic press pin proportion
as the shortening of the tube by the corrugating process proceeds. By means
of the pipe compressed air or steam can be introduced into the interior of the

page_text: on
tube, A ring shaped furnace of any suitable construction mounted
wheels, surrounds the tube and is shifted to the part thereof on which the
corrugation is to be made by this means the said part, such as the annular
zone 1, 2 is heated to the required degree, whereupon the furnace is moved
to one side. The compressed air being then admitted to the tube a while at
the same time water pressure is admitted to the press, the zone 1, 2 bulged
outwards so as to form a corrugation. The height of such corrugation depends
upon the extent of the stroke of the press, and its form upon the width of the
zone heated, the temperature to which it is raised, and the intensity of the
internal pressure.
By this means any desired number of corrugations of any desired form can
be produced upon a tube without the use of moulds.
On the drawing is shown a ring shaped coke furnace which is supplied
with air for combustion through pipes n, it is mounted with wheels upon
rails so that it can be moved into any desired position between the plates of the
press. Instead of a coke furnace a gas furnace or the like, may be employed.
Having now particularly described and ascertained the nature of my suid
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. The heroin described process for the manufacture of corrugated tubes by
the application of internal and axial pressure as set forth in the Specification
No. 23711 of 1898, but dispensing with external mould rings and heating the
tube only at the place where it is to be bulged.
2. In carrying out the process above set forth the use of a movable ring
furnace arranged and operating substantially as described.
Dated this 29th day of August 1900.
ABEL & IMRAY,
Agents for the Applicant.