IMPROVEMENTS IN MACHINES FOR BENDING PLATES, AND FOR CORRUGATING PLATES AND TUBES
Year: 1879

page_text: LETTERS PATENT to Carl Pieper, Civil Engineer and Patent Agent, resident at
74, Belle-Alliance-Strasse, Berlin, S.W., Prussia, for the Invention of
"IMPROVEMENTS IN MACHINES FOR BENDING PLATES, AND FOR CORRUGATING
PLATES AND TUBES." A communication from Adolf Knaudt, Engineer,
resident at Essen on the Ruhr, Kingdom of Prussia.
PROVISIONAL SPECIFICATION left by the said Carl Pieper at the Office
of the Commissioners of Patents on the 24th December 1879.
CARL PIEPER, Civil Engineer and Patent Agent, resident at 74, Belle-Alliance-
Strasse, Berlin, S.W., Prussia. "IMPROVEMENTS IN MACHINES FOR BENDING
PLATES, AND FOR CORRUGATING PLATES AND TUBES." A communication by
Adolf Knaudt, Engineer, resident at Essen on the Rubr, Kingdom of Prussia.
This Invention relates to improvements in machines for corrugating tubes and
plates, and also for bending plates by means of a system of rollers.
In machines of this kind the upper roller is supported by three bearings, of
which the one at the front end must be constructed in such a manner that it may
be removed from its journal in order to allow any tube which is to be corrugated
to be passed over the roller, and to be taken off the same. For this purpose the
front bearing is arranged so as to embrace the journal from the top only. The
body of the bearing made in the shape of a bow, the ends of which being
directed downward are attached to the bedplate or frame of the machine by pins or
pivots, which are placed either parallel to the axis of the journal, or at right angles
to the same.
In the first case the bearing may be turned over on one of its pins when the
other pin is drawn out of its hole. The end of the roller can thus be made free for
passing a tube off or on.
If the pins are arranged at right angles to the journal they must at the same
time lie lower than the latter. The journal is formed more or less spherically, or in

page_text: general in such a manner that the bearing when oscillated on its pins may be freely
slipped off the journal and on the same. This construction allows the bearing to
be turned out of the way without drawing out one of its pins.
The second part of the Invention relates to the arrangement of the lateral
rollers. These are journalled in carriages or slides mounted on inclined beds, so
that when the said rollers are adjusted closer to the upper roller, they will at
the same time be raised, whereas hitherto their carriages have been mounted on
horizontal beds only. When the lateral rollers are fitted in the described manner,
the machine may be used for corrugating straight plates without bending them,
as also for bending and corrugating the same in one operation according as the
rollers are adjusted.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Carl Pieper in the Great Seal Patent Office on the 22nd June
1880.
CARL PIEPER, Civil Engineer and Patent Agent, resident at 74, Belle-Alliance-
Strasse, Berlin, S.W., Prussia. "IMPROVEMENTS IN MACHINES FOR BENDING
PLATES, AND FOR CORRUGATING PLATES AND TUBES." A communication from
Adolf Knaudt, Engineer, resident at Essen-on-the-Ruhr, Kingdom of Prussia.
This Invention relates to improvements in machines for corrugating tubes and
plates, and also for bending such plates in the same operation by means of a system
of rollers.
In machines of this kind the upper roller is supported by three bearings, of
which the one at the front end must be constructed in such a manner that it
may be removed from its journal in order to allow any tube which is to be
corrugated to be passed over the roller and to be taken off the same. For this
purpose the said bearing has hitherto been made in two parts sliding on a
horizontal guide, but this arangement presents the disadvantage that the line on
which the bearing is divided coincides with the direction of the pressure to which
it is exposed. By the improved bearing which constitutes the subject-matter of
the first part of this Invention the said inconvenience is obviated.
the same.
On the annexed Sheet of Drawings the bearing is represented in one arrange-
ment by Figs. 1 and 2, whereas the Figs. 3 and 4 show another arrangement of
The roller which is to be prevented from deflection at its front end by
the improved bearing is the roller D. The bearing (indicated by letter A) is
constructed so as to embrace the journal C of the said roller from the top only, as
the force acting upon the same during the working of the machine is directed
vertically upward. The body of the bearing is made in the shape of a bow, the
ends of which are directed downward and attached to the frame of the machine by
pins or pivots, which are placed either parallel to the axis of the journal C, as
shown by Figs. 1 and 2, or at right angles to the same, as is represented by
Figs. 3 and 4. In the first case the bearing may be turned over on its pin B,
after the other pin B', which has to be suitably arranged for the purpose, is drawn
out of its hole. This pin B¹ serving only for the purpose of locking the bearing
may either be arranged parallel to the journal C, or at any angle to it, and it may
even be replaced by some other suitable locking device.
When the bearing is turned away from the journal and into the position shown
by the dotted lines in Fig. 1, the end of the roller is free for passing on any tube
which is to be corrugated. The bearing having thereupon been put into its place
again and locked by the pin B', the corrugating operation may be proceeded with.
For the purpose of facilitating its displacement, the bearing may be provided with
a lever and a counterbalance weight, or with any suitable mechanism for
moving it.
When the bearing A is pivoted to the frame of the machine in the manner
represented by Figures 3 and 4, that is, when the pins B, B, are arranged at right
angles to the axis of the journal C they must lie lower than the journal, and the
latter must have a spherical or convex shape of such a character that the bearing
when oscillated on its pins and moving in an arc of a circle may slip off the journal
and on the same. In Fig. 4 the bearing is represented in working position in full
lines, whereas its position when removed from the journal is shown by dotted lines.
This arrangement allows the bearing to be turned out of the way without drawing
out one of its pins.
Considering that this bearing like the one first described is a heavy piece of
casting, it is preferred to provide the same also with suitable mechanism for
moving it, such as the one shown in Fig. 4, which will be understood without

page_text: explanation. The shaft E, shown also in Fig 3, may be actuated by means of any
suitable mechanism worked by steam, hydraulic or other power, or by hand.
The second part of the Invention relates to the arrangement of the lateral rollers
F, F, Figs. 4 and 5, the latter Figure being a section on the line x, x, of Fig. 4. The
said rollers are journalled in carriages or slides G, G, capable of moving on or
between inclined guides H, H, so that when the said rollers are adjusted closer to
the upper roller D they will at the same time be raised, whereas in machines of
this kind as hitherto constructed, the carriages of the rollers F, F, have been made
to slide horizontally only.
When the rollers F, F, are fitted in the described manner the machine may be
used for corrugating straight plates without bending them, as also for bending and
corrugating the saine in one operation. It is evident that when the rollers are
adjusted as shown by full lines in Fig. 5, a plate 0, 0, may be passed between the
corrugating rollers D and P, and subjected to their action without the rollers F, F,
operating otherwise on the plate than as guides. But whenever the latter rollers
are brought closer to the roller D they are raised by degrees, and cause the plate to
be bent (as shown by dotted lines O¹, O¹), while it is being corrugated by the
rollers D and P. In the machines at present in use the rollers F, F, not being
capable of any other than a horizontal displacement can only act either as guides
for straight plates, or as bending rollers according to their more or less elevated
position with respect to the roller D.
For the simultaneous and uniform adjustment of the rollers F, F, the mechanism
shown by Figs. 4 and 5 may be used. The same consists for each roller of a shaft
K provided with cranks Q, which act by the connecting-rods R on the pivots fixed
to the slides G. The shafts K carry moreover the toothed sectors L gearing with
the two worms M, M, of which one has a right-handed and the other a left-handed
thread. These worms are keyed on the shaft N which is rotated by any suitable
means. It is evident that the rollers F, F, will be brought closer to the roller D or
recede from it according as the shaft N is turned one way or the other.
This mechanism for the adjustment of the rollers does not however constitute
any part of the Invention to be covered by the Patent, as the same may be
replaced by other arrangements serving for the same purpose.
Having thus described the nature and object of this Invention, and the manner
in which it is to be carried out in practice as communicated to me by my
correspondent, I hereby claim as new and important features of the same,—
1. In combination with the roller 1), the bearing A, Figs. 1 and 2, which is
jointed to the frame of the machine by a pivot or pin B parallel to the axis of the
Journal C, and which can be secured by the pin B¹ or any equivalent locking-
device, substantially as hereinbefore described.
2. In combination with the roller D, the bearing A, Fig. 3 and 4, which
embraces the spherical or convex journal C from the top, and which turns on
pivots or pins placed at a right angle to the axis of the journal, substantially as
specified.
3. The arrangement according to which the two rollers F, F, are pivoted in
carriages G, G, sliding between or on inclined guides H, H, substantially as
described.
In witness whereof, I, the said Carl Pieper, have hereunto set my hand
and seal, this Twelfth day of June, in the year of our Lord One thousand