IMPROVEMENTS IN APPARATUS FOR IMPRESSING ALL KINDS OF DESIGNS ON LEATHER SKINS BY COLD PRESSURE
Year: 1880

page_text: LETTERS PATENT to François Bure, of the City of Paris, in the Republic of
France, Morocco Tanner, for an Invention of "IMPROVEMENTS IN APPARATUS
FOR IMPRESSING ALL KINDS OF DESIGNS ON LEATHER SKINS BY COLD
PRESSURE."
PROVISIONAL SPECIFICATION left by the said François Burc at the Office
of the Commissioners of Patents on the 30th January 1880.
FRANÇOIS BURC, of the City of Paris, in the Republic of France, Morocco Tanner.
"IMPROVEMENTS IN APPARATUS FOR IMPRESSING ALL KINDS OF DESIGNS ON
LEATHER SKINS BY COLD PRESSURE."
The subject of the present Invention is a simplification of the apparatus in
present use for impressing various designs on skins, all complicated mechanism
being avoided.
The apparatus consists of a cast iron frame formed of two uprights strengthened
above by a longitudinal bar; from this latter depend two supports bearing the axes
of the cylinder on which the design is engraved; these supports regulate the
height of this cylinder according to the thickness of the leather to be impressed.
An endless screw at the head of the apparatus and furnished with a fly serves
to fix the engraved cylinder in the requisite position for thoroughly acting on
the skins.
The engraved cylinder is of copper, but may be of any other metal. Each design
necessitates a special cylinder, and the apparatus is worked by steam.
The engraved cylinder is cold, and principally used for Russia leather.
The drum or lower cylinder is of cast iron covered with a casing of gutta percha,
which may itself be covered with stout leather. Cog wheels transmit the motive
power from the transmitting pulleys to the engraved cylinder.
The dimensions of the apparatus would vary according to necessity. The
simplicity and absence of any complicated mechanism transform it into a simple
calendering machine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said François Burc in the Great Seal Patent Office on the 22nd July
1880.
_FRANÇOIS BURC, of the City of Paris, in the Republic of France, Morocco Tanner.
"IMPROVEMENTS IN APPARATUS FOR IMPRESSING ALL KINDS OF DESIGNS ON
LEATHER SKINS BY COLD PRESSURE."
The subject of the present Invention is a simplification of the apparatus in
present use for impressing various designs on skins, all complicated mechanism
being avoided.
It is this simpleness of construction of the apparatus that forms its chief
recommendation; the absence of all needless and complicated parts render it free
from imperfections and want of repair, the results effected by its employment
being perfect in every particular.
The apparatus consists of a cast iron frame A formed of two uprights
strengthened above by a longitudinal bar; from this latter depend two supports
B bearing the axes of the cylinder C on which the design is engraved; these
supports regulate the height of this cylinder according to the thickness of the
leather to be impressed.
An endless screw at the head of the apparatus and furnished with a fly serves to
fix the engraved cylinder in the requisite position for thoroughly acting on the
skins.
The engraved cylinder C is of copper, but other metal may be used. Each
design necessitates a special cylinder, and the apparatus is worked by steam.
The engraved cylinder is used cold, and is principally employed for Russia leather.
The drum or lower cylinder D is of cast iron covered with a case E of gutta
percha, which may itself be covered with stout leather.
Cog wheels F transmit the motive power from the transmitting pulley G to the
engraved cylinder C.
•
The dimensions of the apparatus would vary according to necessity. The
simplicity and absence of any complicated mechanism transform it into a simple
pressing machine.
I claim, the engraved upper cylinder C turning in bearings in the supports B in
conjunction with the lower cylinder D, covered first with gutta percha, and then
with an envelope or case of leather and actuated by the cog wheels F, transmitting
motion from the pulley G to the cylinder.
In witness whereof, I, the said François Burc, have hereunto set my hand
and seal, this Seventeenth day of July, in the year of our Lord One
thousand eight hundred and eighty.
FRANÇOIS BURC. (L.S.)