Improvements in Perforators for Producing Stencils.
Year: 1898

page_text: Date of Application, 12th Aug., 1898-Accepted, 1st Oct., 1898
COMPLETE SPECIFICATION.
Improvements in Perforators for Producing Stencils.
I, 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 perforators for producing stencils,
and is more particularly although not exclusively applicable to perforators designed
for use with type writing machines.
In the Specification of prior Letters Patent granted to me on the 19th June 1895,
No. 11946, I have described a perforator for use in producing stencils with type
writing machines, the said perforator consisting of a sheet of fine silk gauze,
forming the perforating surface, glued or cemented to a sheet of suitable paper.
According to my present invention, instead of using a perforating surface formed
entirely of silk, I employ a surface consisting of a mixture of silk and fine wire.
The silk and wire may be combined together in the form of a woven material or
gauze having a very fine mesh, a sheet of this special gauze being mounted upon a
suitable base such as a sheet of strong paper. I varnish or otherwise treat the
perforator thus formed.
According to one method of carrying my invention into effect, I weave or other-
wise form a gauze of very fine mesh from fine silk threads or strands and fine wire,
such as fine brass wire. The silk is arranged in one direction and the wire in the
other direction crossing the silk; that is to say, the wire may form the warp and
the silk the weft threads, or vice versa.
I take a piece of this special gauze of any desired size according to the use for
which it is designed, and mount it upon a base of strong paper or like fabric by
glueing or cementing the same thereon. When the perforator thus formed is dry,
I apply a suitable varnish to the same to render it less liable to absorb moisture.
I may also add to the glue or cement employed for mounting the gauze a small
quantity of potassium bichromate or sodium bichromate, or of a solution of alum.
My improved perforator will perforate any suitable or specially prepared paper
and will produce stencils by means of typewriting machines, and it is more efficient
in its action, and is also more durable than perforators as heretofore constructed.
My improved perforator can also be used to produce stencils by means of a stylus,
the paper which is to form the stencil bein laid upon the said perforator and the
characters or designs to be reproduced being then traced upon the paper with
the stylus in the same manner as with my well known apparatus called the
"Trynograph."

page_text: 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:
A perforator having a surface consisting of wire and silk threads interwoven or
otherwise combined for the purposes specified.
Dated this 12th day of August 1898.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.