IMPROVEMENTS IN OR CONNECTED PROVISIONAL
Year: 1883

page_text: LETTERS PATENT to Joseph Julius Sachs of Union Court Old Broad Street
in the City of London for an Invention of "IMPROVEMENTS IN OR CONNECTED
PROVISIONAL SPECIFICATION left by the said Joseph Julius Sachs at the
Office of the Commissioners of Patents on the 10th November 1883.
JOSEPH JULIUS SACHS of Union Court Old Broad Street in the City of London
"IMPROVEMENTS IN OR CONNECTED WITH THE PRODUCTION OF SURFACES FOR
PRINTING EMBOSSING OR ORNAMENTAL PURPOSES
•
My Invention has for one of its objects to produce reproductions from
photographs drawings paintings or the like in which reproductions are obtained
the half tones full tones and lights and shades so as to give a faithful representation
of the original. In order to effect this it is necessary to print from the original
or a transparent reproduction of the same upon a sensitive ground (such as one of
chrome gelatine) with the interposition of a transparent medium upon which are
made a number of fine dots or a grain. This grained or dotted surface it has been
proposed to obtain by means of prints from surfaces which have been lined or
'cross hatched" by band and in other ways but hitherto it has been impossible
to obtain satisfactory results by these means. According to my Invention I
obtain a dotted or transparent medium as follows:-I take a metal roller or other
surface of metal or hard material and I submit it to the action of the impact of
hard particles such as is obtained by the projection of sand propelled by a blast
against the said surface. I thus obtain a grained surface of a degree of fineness in
accordance with the fineness of the hard particles employed. I then roll over the
surface thus obtained or cover it with ink or an opaque substance and I take an
impression therefrom upon a transparent medium such for example as upon paper
or the like prepared as described in the Provisional Specification lodged with my
application for Letters Patent N° 3948 dated 14 August 1883. I take the
transparent medium thus covered with an opaque grain and I cover it over or
place it upon the photograph, drawing painting or original to be copied and then
place these together over a sensitized layer such as Chrome gelatine which will
become hardened on exposure to light and I thus obtain by the light passing

page_text: through the grained surface and the photograph drawing painting or the like a
reproduction of the same upon the sensitive layer which when transferred to a
roller or other surface and etched according to any suitable process (such for
example as is explained in the Specification of my prior Patent N° 266 dated the
21 of January 1881) a printing or embossing surface will be obtained from
which impressions can be taken resembling the original. For the purpose of the
transfer to the roller or other surface the sensitive layer may before exposure be
covered with a film of asphaltum or other suitable resist. The grained print or
reproduction from the surface treated by the sand blast may be obtained by direct
printing upon a transparent medium or by any suitable direct or indirect process
of transfer or it may be printed directly upon the photograph, drawing, painting
or the like without the intervention of a special transparent medium
In order to give a colour holding surface to the design eventually produced upon
the roller or other surface. I may treat the same after it has been etched in the
etching bath with the sand blast so as to give a roughened surface to the depressed
parts the raised parts being protected by the original or a special resist
A further object of my Invention is to obtain ornamental effects upon metal
surfaces to resemble inlaid work
According to this part of my Invention I take a metal surface and I roughen
it by submission to the sand blast or the impact of hard particles and I then
cover it with a sensitive layer which I expose to the action of light beneath the
negative or design to be reproduced whereby the parts exposed to the action of
light are hardened. I then roll over or cover the sensitive film thus treated with a
resist or ink which adheres to the hardened parts of the sensitive layer but not
to the unhardened parts which latter may be then removed by washing or in any
suitable way leaving the metal at these parts exposed. A metal preferably of
another colour or kind may then be deposited by electro deposition upon the
exposed parts and then on removing the resist and hardened gelatine from the
other parts the metal surface will have the appearance of inlaid work. Instead of
the process of electrodeposition I may bite into or through the metal at the
exposed parts whereby I obtain perforated ornamental metal work resembling laco
patterns or other designs which give very beautiful effects when used for
decorative purposes. In the process wherein electrodeposition is used the metal
at the exposed parts may before undergoing the process of electrodeposition bo
again submitted to the sand blast to give different grains for the design and the
ground

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Julius Sachs in the Patent Office on the 10th May 1884
JOSEPH JULIUS SACHS of Union Court Old Broad Street in the City of London
"IMPROVEMENTS IN OR CONNECTED WITH THE PRODUCTION OF SURFACES FOR
PRINTING EMBOSSING OR ORNAMENTAL PURPOSES พ
My Invention has for one of its objects to produce reproductions from photographs ´
drawings paintings or the like in which reproductions are obtained the half tones
full tones and lights and shades so as to give a faithful representation of the
original. In order to effect this it is necessary to print from the original or a
transparent reproduction of the same upon a sensitive ground (such as one of
chromo gelatine) with the interposition of a transparent medium upon which is
made a number of fine dots or a grain. This grained or dotted medium it has been
proposed to obtain by means of prints from surfaces which have been lined or
cross hatched" by hand and in other ways but hitherto it has been impossible to
obtain satisfactory results by these means. According to my Invention I obtain a
dotted or transparent medium as follows:-
I take a motal roller or other surface of metal or hard material and I submit it to
the action of the impact of hard particles, such as is obtained by the projection of sand
propelled by a blast against the said surface. I thus obtain a grained surface of a
degree of fineness in accordance with the fineness of the hard particles employed. I
then roll over the surface thus obtained or cover it with ink or an opaque.substance
and I take an impression therefrom upon a transparent medium such for example
as upon paper or the like prepared as described in the Specification of my Letters
Patent No 3948 dated Fourteenth August One thousand eight hundred and
eighty three. I take the transparent medium thus covered with an opaque
grain and I cover it over or place it upon the Photograph drawing painting or
original to be copied and then place these together over a sensitized .layer. such as
Chrome gelatine, which will become hardened on exposure to light and I thus
obtain by the light passing through the grained surface and the photograph drawing
painting or the like a reproduction of the same upon the sensitive layer which, when
it is upon or has been transferred to a roller or other surface and this is treated
and etched according to any suitable process (such for example as is explained
in the Specification of my prior Patent N° 266 dated the Twenty first of January
One thousand eight hundred and eighty one), will give a printing, or embossing
surface from which impressions can be taken resembling the original. For the
purpose of the transfer to the roller or other surface the sensitive layer may before
exposure be covered with a film of asphaltum or other suitable resist. The grained
print or reproduction from the surface treated by the sand blast may be obtained
by direct printing upon a transparent medium or by any suitable direct or
indirect process of transfer or it may be printed directly upon the photograph
drawing painting or the like without the intervention of a special transparent
medium
In order to give a colour holding surface to the design eventually produced upon
the roller or other surface I may treat the same (after it has been etched in the
etching bath) with the sand blast so as to give a roughened surface to the sunk
parts the raised parts being protected by the original or a special resist or covering.
A further object of my Invention is to obtain ornamental effects upon metal
surfaces to resemble inlaid work.
According to this part of my Invention I take a metal surface and I roughen it
by submission to the sand blast or the impact of hard particles and I then cover it
with a sensitive layer which I expose to the action of light beneath the negative or

page_text: design to be reproduced whereby the parts exposed to the action of light are
hardened. I then roll over or cover the sensitive film thus treated with a resist or
ink which adheres to the hardened parts of the sensitive layer, but not to the
unhardened parts which latter may be then removed by washing or in any suitablo
way leaving the metal at these parts exposed. A metal preferably of another 5
colour or kind may then be deposited by electro-deposition upon the exposed parts
and then on removing the resist and hardened gelatine from the other parts the
metal surface will have the appearance of inlaid work. Instead of the process of
electro-deposition, I may bite into or through the metal at the exposed parts
whereby I obtain perforated ornamental metal work resembling lace patterns or 1
other designs which give very beautiful effects when used for decorative purposes
In the process wherein electro deposition is used the metal at the exposed parts
may before undergoing the process of electro-deposition be again submitted to the
sand blast to give different grains for the design and the ground.
Having now described and particularly ascertained the nature of my said 1
Invention and the manner in which the same is or may be used or carried into
effect I would observe in conclusion that what I consider to be novel and original
and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is:―
First In the production of rollers or surfaces for printing or embossing purposes
obtaining by means of the sand blast or the impact of hard particles, a surface from
which a dotted or grained medium is produced which is placed together with a
photograph drawing painting or the like upon a sensitive layer or material which
is upon or is afterwards transferred to the roller or surface to be etched and
afterwards treating and etching the said roller or surfaco all substantially as and
for the purpose heroinbefore described.
Second. In the production of rollers or surfaces for printing purposes obtaining a
colour holding surface by submitting the said rollers or surfaces to the action of
the sand blast or the impact of hard particles after the design has been etched
or produced on the said rollers or surfaces and whilst the parts which are not to
hold colour are protected by a material or substance capable of resisting the
action of the said sand blast or impact substantially as herein beforo described.
Third. Obtaining ornamental work by first roughening or graining a metallic
surface by the sand blast or the impact of hard particles then covering it with a
sensitive layer and exposing it to the action of light beneath the negative or design
to be reproduced then rolling over or covering the same with a resist or ink and
then removing the soluble parts of the sensitive layer and afterwards submitting
the exposed parts to a process of electro-deposition or of etching or biting through
or as an alternative submitting the said exposed parts again to the action of the
sand blast or the impact of hard particles and afterwards to a process of Electro
deposition all substantially as hereinbefore described
In witness whereof I the said Joseph Julius Sachs have to this my Specification
set my hand and scal this Seventh day of May One thousand eight hundred and
eighty four