An Improved Manufacture of Stencil Sheets.
Year: 1894

page_text: Date of Application, 22nd June, 1894
2005
An Improved Manufacture of Stencil Sheets.
1. EUGENIO DE ZUCCATO, of 15 Charterhouse Street, in the City and County
of London, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improved manufacture of stencil-sheets that is to say
of the material or fabric from which stencils may subsequently be made.
My improved material is particularly adapted for use in making stencils by
means of a type-writer. It has heretofore been the custom to use for such purposes
a kind of Japanese paper well known in the trade, treated with stearine, paraffin
wax or similar substances, such paper so treated possessing the property of allowing
the types of the type-writer when the paper is placed upon a suitable surface, such
as for instance a piece of silk gauze resting on the platten of the machine, to form
their characters in it without thoroughly punching it out or breaking it through:
such paper remains impermeable to the ink which is brought into contact with it
when employed for stencilling except at those places where the ink is required to
pass through. It is found however that the aforesaid paper made in this manner
when used with a type-writer for the purpose of making stencils has several
disadvantages, as the wax becomes detached from the paper and clogs the silk
gauze or other surface upon which it rests and also the types of the machine unless
a sheet of the same unprepared paper is placed between it and the said types while
the stencil is being made. Such waxed paper is moreover exceedingly brittle and
requires great care in handling to avoid injury to the same.
According to my invention I produce improved stencil sheets consisting of thin
paper or other fabric coated with a resin or a gum or a similar substance and
rendered limp and pliable by being impregnated with glycerine.
In carrying my invention into practice I prefer to proceed as follows, that is to
say, use a very thin and light paper of good quality free as far as possible from
pin holes and preferably possessing a long fibre. A good thin tissue paper for
example will be found serviceable for this purpose. I preferably coat the same on
one side with a solution of shellac in alcohol, or gilder's lacquer, or any other
suitable varnish. This may be done by means of a brush, and several coatings
may be applied according to the substance of the paper and to the body of the
varnish. next impregnate the dried, coated, or varnished paper with pure
glycerine, or a solution of glycerine and water or glycerine and spirit, to
permanently moisten the paper, thus rendering the sheet limp and plastic.
When properly soaked the paper is blotted with paper to get rid of the surface
moisture, or such moisture is removed by any other suitable means.
It is well known that glycerine at ordinary temperatures does not readily change
its state, hence paper treated as above described will remain in its moist and plastic
state for a considerable length of time, and will also possess sufficient tenacity on
account of the coating of varnish to withstand the ordinary usage to which it is
subjected in printing.
The glycerine with which the varnished paper is impregnated renders it very
pliable, flexible and plastic and fit to be perforated by the action of the types
without the characters formed by the said types in the paper being cut or broken
out or punched out altogether which would be the case with the paper I employ
and other similar papers if the saine were hard and stiff.

page_text: Although my improved stencil sheets are particularly adapted for use with a
typewriter arranged to perforate or partially perforate the same, it is clear that
they may be perforated for use as stencils by other means.
Dated this 22nd day of June 1894.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
An Improved Manufacture of Stencil Sheets.
1, EUGENIO DE ZUCCATO, of 15 Charterhouse Street, in the City and County
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 :-
My invention relates to an improved manufacture of stencil-sheets that is to
say of the material or fabric from which stencils may subsequently be made.
My improved material is particularly adapted for use in making stencils by
means of a type-writer. It has heretofore been the custom to use for such purposes
a kind of Japanese paper well known in the trade, treated with stearine, paraffin
wax or similar substances, such paper so treated possessing the property of allowing
the types of the type-writer when the paper is placed upon a suitable surface, such
as for instance a piece of silk gauze resting on the platten of the machine, to form
their characters in said paper without thoroughly punching it out or breaking it
through; such paper remains impermeable to the ink which is brought into contact
with it when employed for stencilling except at those places where the paper has
been impressed by the types of the type-writer. It is found however that the
aforesaid paper made in this manner when used with a type-writer for the purpose
of making stencils has certain disadvantages, for instance sometimes the wax
becomes detached from the paper and clogs the silk gauze or other surface upon
which it rests. Such waxed paper is moreover exceedingly brittle and requires
great care in handling to avoid injury to the same.
According to my invention I produce improved stencil sheets consisting of thin
paper or other fabric coated with a resin or a gum or a similar substance and
rendered limp and pliable by being impregnated with glycerine.
[ usc
In carrying my invention into practice I proceed as follows, that is to sny,
a very thin and fight paper of good quality free as far as possible from pin holes
and preferably possessing a long fibre. A good thin tissue paper for example will
be found serviceable for this
purpose. I coat the same with a solution of shellac
in alcohol, such as gilder's facquer, or any other suitable varnish. This may be
done by means of a brush, and several contings may be applied according to the
substance of the paper and according to the body of the varnish. When this
conted, or varnished paper is dry I impregnate it with pure glycerine, or a solution
of glycerine and water or glycerine and spirit, to permanently moisten the paper,
thus rendering the sheet limp and plastic.
When properly soaked the paper is blotted with paper to get rid of the surface
moisture, or such moisture is removed by any other suitable means.
According to another and preferable method of producing the stencil sheets I
mix the glycerine with the resin or alcoholic varnish and then cont the paper with
this mixture thus impregnating the paper with the glycerine and coating it with
the resin or varnish at one and the same operation. The proportions of the
glycerine and resin that I have found to give satisfactory results are about one pint
of glycerine to about one gallon of gilder's lacquer. This mixture may be diluted
with a suitable quantity of spirits of wine even up to an equal part of its bulk by
measure for the purpose of rendering it of thinner consistency as I find that a thin

page_text: mixture adheres better to the paper. 1 coat the paper three or four times with
this mixture on one or both of its sides it being understood that in coating both
sides of the paper the number of coatings above mentioned should be distributed
between the two sides.
I wish it to be understood that I do not limit myself to the precise proportions
above stated as such will vary according to the quality and thickness of the paper
employed and according to the quality and body of the resin or alcoholic varnish
used. The object of using the resin or alcoholic varnish is to fill up the pin holes
of the paper and to make it ink proof as far as possible without however interfering
with the plasticity imparted to the paper by the glycerine.
It is well known that glycerine at ordinary temperatures does not readily change
its state, hence paper treated as above described will remain in a moist and plastic
condition for a considerable length of time.
The glycerine with which the varnished paper is impregnated renders it very
pliable, flexible and plastic and capable of being perforated with innumerable
interstices at those parts where the types strike the paper during the type writing
operation without the characters formed by the said types in the paper being cut,
or broken out, or punched out altogether, which would be the case with ordinary
tissue paper and other similar papers if the same were hard and stiff.
Although my improved stencil sheets are particularly adapted for use with a
typewriter, it is clear that they may be employed as stencils for other purposes.
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 process of producing stencil-sheots which consists in first coating sheets
of paper with resin or similar substance and then impregnating the same with
glycerine, substantially as described.
2. The modified method of producing stencil-sheets consisting in coating sheets
of paper with a mixture or solution of which the essential ingredients are resin
or similar substance and glycerine substantially as described.
3. A stencil-sheet composed of paper having an adherent film of resin or similar
substance and impregnated with glycerine, substantially as, and for the purposes,
specified.
Duted this 10
10th day of February
100
EUG. DE ZUCCATO.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.