Year: 1886

page_text: I, MARLBOROUGH CONRATH, of No 15 North Audley Street, Grosvenor Square
in the County of Middlesex, Upholsterer, do hereby declare the nature of this
invention to be as follows: —
My invention relates to the manufacture of rolls for embossing sheets of more or
less impressible material passed through between them.
I prepare one of the pair of rolls in metal having the design engraved or
otherwise formed in intaglio upon it. I mount this roll in a framing above
another plain roller of a little smaller diameter geared to it so that the two rolls
revolve at the same angular speed. Both rolls are made with tubular journals so
that they can be heated by steam introduced into them.
I first heat the lower or plain roll, and while it is revolving along with the
upper roll, I pass in between the rolls a sheet of vulcanite in a plastic condition
which I powder with flour of sulphur. This sheet adheres to the hot roll and
takes the impression from the upper roll. After the impression is fully made, I let
the lower roll cool while it still continues to revolve for some time along with the
upper roll. I then remove the lower roll and place it in a metal casing pouring in
all round it plaster of paris. When this has set I put the casing containing the
roll into an oven which may be heated by high pressure steam, and subject it to
heat for several hours, this having the effect of hardening the vulcanite. The roll
is then removed from the casing, cleared from the plaster of paris, and replaced in
the frame in gear with the upper roll, ready for use in embossing.
с
ABEL & IMRAY,
Agents for the Applicant..

page_text: I, MARLBOROUGH CONRATH of No 15 North Audley Street; Grosvenor Square
in the County of Middlesex, Upholsterer 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 the manufacture of rolls for embossing sheets of more or
less impressible material passed through between them.
I prepare one of the pair of rolls in metal having the design engraved or
otherwise formed in intaglio upon it. I mount this roll in a framing above
another plain roller of a little smaller diameter geared to it so that the two rolls
revolve at the same angular speed. Both rolls are made with tubular journals so
that they can be heated by steam introduced into them.
I firt heat the lower or plain roll and while it is revolving along with the upper
roll, I pass in between the rolls, a sheet of vulcanite in a plastic condition. I find
it convenient to apply the plastic vulcanite to the roller. in the form of a long; strip
which becomes helically wound. on it as the roll revolves. The contiguous edges
of the convolutions adhering together so that the vulcanite forms a continuous
coating of the roller, which should be more or less thick according as tho
prominences of the metal roller are more or less high. This vulcanite coating
adheres to the hot roll and takes the impression from the upper roll which is
gradually made by gradually moving the bearers of the rollers nearer together.
While the impression is being made I powder the vulcanite with flowers of
sulphur, or with other powder such as French chalk that will prevent adhesion.
After the impression is fully made I let the lower roll cool while it still continues to
revolve for some time along with the upper roll, I then remove the lower roll
from the framing and place it in a metal casing of larger diameter, which I fill up
by pouring in all round the roller plaster of paris. When this has set I put the
casing containing the roll into an oven, which may be heated by high pressure
steam, and subject it to heat for several hours, this having the effect of hardening
the vulcanite. The roll is then removed from the casing and cleared from the
plaster of paris, whereupon it can be replaced in the frame in gear with the upper
roll ready for use in embossing.
Having now particularly described and ascertained' the nature of my said
invention and in what manner the same is to. be performed I declare that what
I claim is
=
•
The herein described process for manufacturing embossing rolls, that is to say,
making one roll in metal with the intaglio design, making, by this roll a counterpart
impression on a soft vulcanite coating of a second heated roll, enclosing the roll
thus impressed in, a casing filled up with plaster of paris and heating until the
vulcanite is hardened.
Deted this Olat daw of T. 100