Improvements in Machines for the Manufacture of Millboard, Paste- board, or the like..
Year: 1896

page_text: Date of Application, 13th July, 1896-Accepted, 15th Aug., 1896
COMPLETE SPECIFICATION.
Improvements in Machines for the Manufacture of Millboard, Paste-
board, or the like..
I, GUSTAV LUDVIG THEODOR HARTMANN, of Christiania, in the Kingdom
of Norway, 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 :-
My invention relates to machines for making millboard, pasteboard or the like
and consists essentially in the novel construction and arrangement of a roller over
which the usual felt or apron runs, whereby the said roller not only carries the felt
with the other rollers but also automatically and exactly guides or regulates the
said felt or apron so that it always runs straight through the machine.
In carrying out my invention I have made use of the circumstance that a belt,
a cloth or the like, running upon a pulley or roller slightly conical or not perfectly
cylindrical, has a tendency to draw over to the part of the pulley which has the
largest diameter.
In the accompanying drawings,
Figure 1 is a sectional side view of a roller constructed according to my
invention; and,
Figure 2 is a sectional end view of the same.
My improved roller comprises a number of segments a, separated by suitable
spaces b, each of the said segments being pivoted at c on a boss or sleeve d keyed
to the middle of the shaft e of the roller.
Each segment has at each end an ear or lug f to which is jointed one end of a
link g, the other end of which is connected with a sleeve h movable longitudinally
on the shaft e. Collars i, adjustably fixed to the shaft e by screws k, k limit the
inward movement of the said collars."
With this arrangement it will be obvious that when the felt or apron is running
evenly around my roller, that is to say, with an even width on both sides of the
central pivots c, the said roller will be of uniform diameter throughout. If,
however, greater pressure be brought on one side of the pivots c than on the other,
as for instance would be the case should the apron or felt run aslant, then the end of
the roller with the greatest pressure would be reduced in diameter and the other
end correspondingly increased, whereby the felt following its tendency to run on to
the end of the roller of larger diameter will move laterally upon the said roller
until the balance is again restored.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be perforined, I declare that what I
claim is:-
1. In a machine for making millboard, pasteboard or the like, a roller over
which the usual felt or apron runs so arranged that its diameter can be increased
or diminished at one end and correspondingly diminished or increased at the other
end, substantially as, and for the purpose, described.
2. A roller of the kind referred to in Claim 1, composed of a number of
segments a having intervening spaces, each segment oscillating on a central pivot c
and being connected at the ends with sleeves h, h movable on the shaft in such a
manner that the automatic diminution and enlargement of the diameter of the two

page_text: ends of the roller may take place when the felt or apron is running aslant over the
roller, substantially as described.
3. The manufacture and use of the improved roller hereinbefore described and
illustrated in the accompanying drawing for the purpose specified.
Dated this 13th day of July 1896.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.