Improved Rolling Mill for Rolling Seamless Sheet Metal Cylinders, Hoops, Rings, and the like.
Year: 1896

page_text: Date of Application, 13th Jan., 1896
Complete Specification Left, 24th Aug., 1896-Accepted, 26th Sept., 1896
PROVISIONAL SPECIFICATION.
Improved Rolling Mill for Rolling Seamless Sheet Metal Cylinders,
Hoops, Rings, and the like.
I, HEINRICH EHRHARDT, of 20 Reichstrasse Düsseldorf, Germany, Engineer,
do hereby declare the nature of this invention to be as follows:-.
This invention has for its object an improved construction of rolling mills for
rolling seamless sheet metal cylinders, hoops, rings, and the like, whereby the
pressure of the rolls is made to take place progressively from the middle towards
each end, instead of uniformly along the entire length of the rolls as heretofore,
whereby the stretching of the annular objects acted upon is effected in a more
advantageous manner, and a simultaneous stretching in the direction of the width is
effected.
For this purpose referring to the accompanying drawing, the one roll a Fig. 1 is
driven in the ordinary manner, but the upper roll has a horizontal oscillating
motion imparted to it. By this means the acting pressing surface is made to
proceed from the middle of the rolls towards each end, at each oscillation, and the
stretching is therefore facilitated and accelerated both in the direction of the width
and the diameter.
The said oscillation is effected either by means of eccentrics, as shewn at Fig. 2,
or by cams, wedges, screws &c.
Fig. 3 shews in dotted lines the extreme angular position of the roll at the end of
each oscillation.
The annular blank d Fig. 2 to be acted upon can be prepared in any known
manner.
Dated this 13th day of January 1896.
ABEL & IMRAY,
Agents for the Applicant.
Improved Rolling Mill for Rolling Seamless Sheet Metal Cylinders,
Hoops, Rings, and the like.
I, HEINRICH EHRHARDT, of 20 Reichstrasse Düsseldorf, Germany, 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 has for its object an improved construction of rolling mills for
rolling seamless sheet metal cylinders, hoops, rings, and the like, whereby the
pressure of the rolls is made to take place progressively from the middle towards
each end, instead of uniformly along the entire length of the rolls as heretofore,
whereby the stretching of the annular objects acted upon is effected in a more
advantageous manner, and a simultaneous stretching in the direction of the
width is effected.
For this purpose referring to the drawing accompanying my Provisional
Specification the one roll a Fig. 1 is driven in the ordinary manner, but the upper

page_text: roll has a horizontal oscillating motion imparted to it. By this means the
acting pressing surface is made to proceed from the middle of the rolls towards
each end, at each oscillation, and the stretching is therefore facilitated and
accelerated both in the direction of the width and the diameter.
The said oscillation is effected either by means of eccentrics, as shewn at Fig. 2,
or by cams, wedges, screws &c.
Fig. 3. shews in dotted lines the extreme angular position of the roll at the end of
each oscillation.
The annular blank d Fig. 2 to be acted upon can be prepared in any known
manner.
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 :-
A rolling mill for cylindrical boiler sections, hoops, rings & c., wherein oscillations
in a horizontal direction are imparted to the one roll during the rolling operation so
as to cause its axis to assume varying horizontal angular positions relatively to that
of the other roll, substantially as described.
Dated this 24th day of August 1896.
ABEL & IMRAY,
Agents for the Applicant.