Improvements in Rolling Mills.
Year: 1894

page_text: Date of Application, 11th June, 1894
Complete Specification Left. 4th Mar., 1895-Accepted, 6th Apr., 1895
Improvements in Rolling Mills.
I, PETER KNOBEL, of Flums, Switzerland, Manufacturer, do hereby declare
the nature of this invention to be as follows:
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This invention relates to an improved rolling mill in which a pair or pairs of
rolls are employed as is customary but instead of both rolls of a pair acting
directly on the article under treatment as heretofore usual (the rolls being of such
respective contours as to impart the desired shape to the article passing between
them) only one roll of a pair so acts, the desired shape being imparted to the
article, at another or other parts thereof, not by the other roll, which is or may be
a plain roll, (and is hereinafter so called) but by a lining or packing bar which
passes together with the article to be rolled, between the pair of rolls.
The plain roll acts as a guiding roll and determines the distance between the
lining or packing and the other roll. The packing bar is preferably made in the
form of an endless ring, the diameter of which is or may be a multiple of
the diameter of the plain roll, but may be straight, and it assumes this form
when the diameter of the said ring is taken to be infinitely great in a geometrical
sense. The packing bar supports the rolled material for a certain distance after
the latter has passed between the rolls, and thus effectually prevents it from
becoming skewed, twisted or bent, as frequently happens in rolling operations; the
result being that the rolled articles (iron rails for instance) leave the rolling mill in
a straight condition, and do not require to be straightened subsequently:
The distance through which the packing bar, when in the form of a ring, supports
the rolled material in this manner, will be greater, the larger its diameter. In the
case of a straight packing bar, the material supported throughout its length.
The packing bar is driven by the plain roll in the same way as an internal gear
wheel or a straight toothed rack is driven by a spur gear wheel, with the difference
that mere friction acts in this case in place of gear teeth, although gearing may be
employed if desired.
When the packing bar is in the form of a ring, the material to be rolled may be
caused to pass uninterruptedly through a whole series or train of pairs of rolls
having various sized grooves and fitted with packing rings of this kind, whereby
the material can be finished by rolling in one pass, or if treated hot, in one heat.
The accompanying drawings illustrate two arrangements of this improved
rolling mill,
Fig. 1 being a vertical axial or longitudinal section of an arrangement having a
straight packing bar,
Fig. 2 an end elevation of the same; and
Fig. 3 an end view of an arrangement in which the packing bar is in the form
of an endless ring.
The packing bar a is of a cross section such that the surface that is next the
active roll b, corresponds to the shape to be given to the article at that part. The
material e to be rolled is placed on the packing bar a 'which is supported by
the plain or guiding roll d against the pressure of the roll b.
The rolls b and d are
driven in any usual or suitable manner, and motion being imparted by them to the
packing bar a. This motion is rectilinear when the packing bar is straight,
and is circular when the packing bar is in the shape of a ring, the packing
bar being suitably guided, it may be by means of guide rollers.

page_text: As shown in Fig. 3, a wedge-shaped guide-piece e may be arranged between the
rolled material and the packing a at the point at which the rolled material leaves
the packing, and an intermediate treatment of the rolled material may be effected
by means of ordinary section-rolls f..
Improvements in Roшing mills.
I, PETER KNOBEL of Flums, Switzerland, Manufacturer, 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 an improved rolling-mill in which a pair or pairs of rolls
are employed as is customary but instead of both rolls of a pair acting, directly on
the article under treatment as heretofore usual (the rolls being of such respective
contours as to impart the desired shape to the article passing between them)
only one roll of a pair so acts, the desired shape being imparted to the
article at another part or other parts thereof not by the other roll, which is or may
be a plain roll (and is hereinafter so called), but by a lining or packing bar which
passes together with the article to be rolled, between the pair of rolls.
The plain roll acts as a guiding roll and determines the distance between the
lining, or packing, bar and the other roll: The packing bar is preferably made in
the form of an endless ring, the diameter of which is preferably made as large as
convenient, in order that it shall be as nearly; straight as possible, i.e. in order that
its curvature shall be as small as possible; but the packing-bar may be straight
corresponding to a ring the diameter of which is taken to be infinitely, great.
The packing bar supports the rolled portion of the article under treatment for
a certain distance after the said portion has passed from between the rolls, and thus
effectually prevents it from becoming, skewed, twisted, or bent, as frequently
happens in rolling operations, the result being that the rolled articles (iron-rails for
instance) will leave the rolling-mill in a straight condition and therefore do not
require to be straightened subsequently. The distance through which the packing
lar, when in the form of a ring, supports iii this manner the rolled portion of the
article will be greater, the larger its diameter. In the case of a straight packing
bar, the article is supported throughout its length. The packing bar is driven by
the plain roll in the same way as an internally toothed wheel or a straight toothed
rack is driven by a spur wheel, with the difference that mere friction acts in this
case in place of teeth although gearing may be employed if desired.
When the packing bar is in the form of a ring, the material or article to be
rolled may be caused to pass uninterruptedly through a whole series or train of
pairs of rolls having grooves of various sizes and fitted with packing rings of this
kind, whereby the material or article can be finished by rolling in one pass through
the series or train of rolls, or if treated hot, in one heat.
The drawings filed with my Provisional Specification illustrate two arrangements
of this improved rolling mill,
•
Fig. 1 being a vertical axial or longitudinal section of an arrangement having a
straight packing bar;
Fig. 2 an end elevation of the same; and
Fig. 3 an end view of an arrangement in which the packing bar is in the form
of an endless ring.

page_text: The packing bar a is of a cross section such that the surface that is next the
active roll b corresponds to the shape to be given to the article at that part. The
material or article c to be rolled is placed on the packing bar a, which is supported
by the plain or guiding roll d against the pressure of the roll b. The rolls b and d
are driven in any usual or suitable manner, and motion is imparted by them to the
packing bar a. This motion is rectilinear when the packing bar is straight, and is
circular when the packing bar is in the shape of a ring, the packing bar being
suitably guided, it may be by means of rollers.
As shown in Fig. 3, a wedge-shaped guide-piece e may be arranged between the
rolled material and the packing ring a at the point at which the rolled material
leaves the said packing ring and an intermediate treatment of the rolled material
may be effected by means of rolls of the ordinary kind for producing the final
section desired.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A rolling-mill for rolling bar-iron and the like, in which of a pair of
co-operating rolls one only is grooved or formed so as to impart the desired cross
sectional form or profile to the article or material to be rolled, whilst the desired
cross-sectional form or profile is arranged to be imparted to the other side of the
said article or material by a bar-like lining or packing which is adapted to support
the rolled portion of the said article or material for a suitable distance from the
rolls so as to prevent it from becoming bent as a consequence of the rolling,
substantially as herein described.
2. A rolling-mill of the kind specified in the preceding claim, in which the
packing or lining is made in the form of an endless ring to enable the working to
take place continuously substantially as herein described.
Dated this 4th day of March 1895.
Dated this 4th day of March 1895.
For the Applicant.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.