Improvements in the Method of Producing Stencil-sheets, and of Printing therefrom.
Year: 1895

page_text: Date of Application, 19th June, 1895
Complete Specification Left, 18th Mar., 1896-Accepted, 2nd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in the Method of Producing Stencil-sheets, and of
Printing therefrom.
:-
I, EUGENIO DE ZUCCATO, of 15 Charterhouse Street, in the City of London
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the method of producing stencil-
sheets and of printing therefrom, such sheets being more especially applicable for
use in connection with type-writing machines.
.
According to my invention the sheets of paper or other material employed in the
production of the stencils may be prepared in the manner set forth in the Specifi-
cations of prior Patents No. 13851 dated the 17th day of July 1893 and No. 12136
dated the 22nd day of June 1894, in the former of which glycerine was employed
in conjunction with gelatinous substances and in the latter in conjunction with
resinous substances. Or instead of using sheets thus prepared I have since found
that I can employ sheets prepared with glycerine only or a solution thereof such
sheets being subsequently treated as hereinafter stated.
The sheets, whether prepared in accordance with the above mentioned Specifi-
cations or prepared with glycerine alone, are, before being type-written, in a limp
soft and pliable condition. In order to permit of their being conveniently and
easily converted into stencils I employ a perforator consisting of fine silk gauze or
other suitable material glued or cemented to a sheet of paper, and upon this
perforator the limp stencil-sheet is laid, its ends being secured thereto by means
of paper caps or pockets fitting onto the ends of the aforesaid perforator. In this
condition the perforator and the stencil-sheet are inserted together into the type-
writing machine and the desired stencil produced in the usual way.
The stencil-sheet and perforator are then taken from the type-writing machine
and the stencil is removed from the perforator. If the said stencil-sheet has been
prepared with glycerine only, it is then dried by heat, or treated with water or
otherwise acted upon to deprive it of its glycerine, after which the stencil-sheet
assumes a hard and dry condition which renders it ink-proof and very convenient
to print from.
The stencil-sheet having been thus dried and hardened is ready for the printing
operation. This is effected by stretching the stencil-sheet, together with a sheet
of paper of open texture placed upon it, in a printing frame of any suitable
construction. The paper prefer to employ is that known in the trade as
"Yoshino
"" paper. This paper is sufficiently porous to allow the ink to pass
through it and reach the stencil-sheet beneath, without the latter becoming torn or
injured by the ink roller squeegee or other means employed for applying and
forcing the ink through the stencil.
In order to prevent the fibres of the "Yoshino " paper from being easily rubbed
off in the course of printing I impregnate it with a varnish, or any other suitable
substance that will make the fibres adhere together. Impressions are obtained
from the stencil-sheet upon sheets of plain paper in the ordinary manner.
I wish it to be understood that the stencil-sheets prepared in accordance with
the inventions set forth in my hereinbefore mentioned prior Specifications may,
after they have been impressed and perforated with the desired matter in the
type-writing machine, also be subjected to the drying or hardening operation
above set forth with respect to the sheets prepared simply with glycerine. Such

page_text: operation is very desirable more especially when a large number of copies is
required from stencils of the kind herein alluded to.
Dated this 19th day of June 1895.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in the Method of Producing Stencil Sheets, and of
Printing therefrom.
1, EUGENIO DE ZUCCATO, of 15 Charterhouse Street, in the City of London,
Manufacturer, 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 relates to improvements in the method of producing stencil-sheets
and of printing therefrom, such sheets being more especially intended for use with
type-writing machines.
According to my invention the sheets of paper or other material employed in
the production of the stencils may be prepared in the manner set forth in the
Specifications of prior Patents No. 13851 dated the 17th day of July 1893 and
No. 12136 dated the 22nd day of June 1894, in the former of which, a solution of
glycerine and spirits of wine or water was employed in conjunction with gelatinous
substances, and in the latter a similar solution in conjunction with resinous
substances. Instead of using sheets thus prepared I have since found that I can
employ thin sheets prepared with glycerine or a solution thereof without the use
of the aforesaid gelatinous and resinous substances, such sheets, being subsequently
treated as hereinafter stated. I prefer to employ a solution of glycerine and
spirits of wine the said glycerine being in such a proportion as to make the said
sheets so limp and plastic that they are capable of being perforated by the type-
writing machine, as is well understood. The proportion of glycerine employed in
the solution depends upon the substance and quality of the paper treated and the
manner of applying the glycerine solution, but I generally use a solution containing
about 30% of glycerine when employing paper of a weight of from 4 to 4 lbs. to
the ream, medium size.
The sheets, whether prepared in accordance with the above mentioned Specifi-
cations or prepared with glycerine solution alone, are in a limp, soft and pliable
condition which renders them somewhat difficult to manipulate in the type-writing
machine during their conversion into stencils. I therefore employ a perforator'
consisting of fine silk gauze or other suitable material which is glued or cemented
to a sheet of stout paper. Upon this perforator the limp stencil-sheet is laid, and
its ends are secured thereto by means of paper caps or pockets fitting onto the
ends of the aforesaid perforator. In this condition the perforator and the stencil-
sheet can be very conveniently inserted into the type-writing machine without fear
of damage to the stencil sheet and the desired stencil is produced in the usual way.
The stencil-sheet and perforator are then taken from the ty pe-writing machine
and the stencil is removed from the perforator. If the said stencil-sheet has been
prepared with glycerine solution only, it is then subjected to heat, or treated with
water and dried, or is otherwise acted upon, to deprive it of its glycerine, after
which the stencil-sheet assumes a hard and firm condition which renders it ink-
proof and very convenient to print from.
The stencil-sheet having been thus treated is ready for the printing operation.
This is effected by stretching the stencil-sheet, together with a sheet of paper of
open texture placed upon it, in a printing frame of any suitable construction. The
paper I prefer to employ is either that known as "Yoshino" paper or that known

page_text: as Japanese copying paper. This paper is sufficiently porous to allow the ink to
pass through it and reach the stencil-sheet beneath, without the latter becoming
torn or injured by the friction of an ink-roller squeegee or other means employed
for applying and forcing the ink through the stencil.
In order to prevent the fibres of the "Yoshino" paper from being easily rubbed
off in the printing operation I may varnish it with a very diluted solution of resin.
Impressions are obtained from the stencil-sheet upon sheets of paper in the
ordinary manner. .
I wish it to be understood that the stencil-sheets prepared in accordance with
the inventions set forth in my hereinbefore mentioned prior Specifications may,
after they have been impressed and perforated with the desired matter in the
type-writing machine, also be subjected to the drying or hardening operation
above set forth with respect to the sheets prepared simply with glycerine solution.
This treatment will be found of the greatest advantage when a large number of
copies is required from stencils of the kind herein alluded to.
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 :-
1. The method of producing a stencil sheet by treating a sheet of paper of
suitable quality and substance with glycerine or a solution containing glycerine
and after the said sheet has been converted into a stencil substantially as described,
subjecting it to heat or otherwise acting upon it to deprive it of the glycerine, for
the purpose specified.
2. The method of producing stencil sheets and of printing therefrom,
substantially as herein before described.
Dated this loth day of March 1990.
EUG. DE ZUCCATO.
Haseltine, Lake & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.