An Improved Machine for Embossing or Impressing Patterns on Leather.
Year: 1899

page_text: Date of Application, 12th Oct., 1899-Accepted, 25th Nov., 1899
COMPLETE SPECIFICATION.
An Improved Machine for Embossing or Impressing Patterns
on Leather.
We, JULIUS THOMSON and AUGUST PETRI, both of 25, Domstrasse, Offenbach
on the Main, in the Empire of Germany, Leather Factors, 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 a machine for embossing or impressing patterns
of any suitable kind on leather, more particularly for making imitations of fine
leather such as lizard skin, crocodile and the like.
In leather rollers as hitherto employed, no alteration of the distance between
the roller and the impressing plate can take place during the impressing. In
contrast thereto the present improved machine is arranged, in such a way that
with a pressure which always remains quite constant the distance between the
roller and the impressing plate will always suit itself to the actual thickness of
the leather. By this means a very clean impression and also a great saving of
the leather and an even impression over the whole piece is obtained. Further,
in this improved machine, various improvements are introduced, such for. in-
stance as that the leather is pressed against the impressing plate by means of a
special table in such a way that no injury to the workman can take place through
negligence or want of diligence. This table is also so arranged that the pattern
can be fully inspected on the introduction of the leather, and thus care may be
taken that the separate impressions fit against one another in the correct manner.
This improved machine is shown in the accompanying drawings in one form of
construction, Fig. 1 being a vertical longitudinal section and Fig. 2 a vertical
cross section.
The impressing takes place by the leather being placed on a counter-balanced
table and held by this latter against the impressing plate. after which a pressing
roller is pressed against the leather from the other side, said roller having a
to-and-fro movement.
Between the standards a of the machine, two bars are so arranged as to be
movable up and down. A screw spindle is mounted between these bars or
supports b, which screwed spindle is adapted by its rotation to move a carriage d
running on wheels. A smooth pressure roller e is mounted on said carriage.
The supports 6 together with the last named parts rest on screws m, which are
screwed through levers which latter together with weighted levers 7 form a
balance with a very great leverage, and the equipoise of which is formed by the
pressure necessary for impressing, that is to say the resistance. The regulation
of the pressure takes place by the adjustment of the weights on the levers 7,
whilst the exact adjustment of the pressure roller e is rendered possible by
means of the screws m.
The pressure roller e presses from beneath against an impressing plate f
containing the pattern. The said plate f is hollow and so arranged that it may
be heated. The leather to be impressed is placed on a frame suspended on
levers h, said levers allowing of the frame moving up and down, and also

page_text: counterbalancing it by means of a weight
The said frame is cut out so far
in the centre that the roller e can move freely therein.
The screwed spindle c for moving the pressure roller is operated by means
of belts pulleys no p, of which the centre one is fixed whilst the others are
loose and carry belts travelling in opposite directions. An arrangement is also
preferably adopted by which the throwing into or out of action of the belts may
take place automatically, which may be easily effected by means of suitably
arranged catches on switch levers. Instead of a screwed spindle c, other means
of operating, such for instance as a cord, chain or the like may be adopted.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
1. A machine for embossing or impressing patterns on leather, in which the
impressing roller (e) together with its entire guiding and moving mechanisms
is arranged, by means of pressure screws (m) and a lever arrangement (k 1) to
form a balance with a strong leverage, whilst the leather to be treated is held
against an impressing plate (f) (which if desired may be heated) by means of a
frame (9) which is cut out in the centre, and held straight by means of levers (h)
counter-balanced by a weight, substantially as hereinbefore described.
2. The general construction and combination of parts taken as a whole forming
the improved machine for embossing or impressing patterns on leather, substan-
tially as described with reference to the accompanying drawings.
Dated
WM. P THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicants.