Improvements in Filling-Engraved Metallic Plates.
Year: 1897

page_text: Date of Application, 5th Mar., 1897
Complete Specification Left, 5th Jan., 1898-Accepted, 5th Apr., 1898
Improvements in Filling-Engraved Metallic Plates.
I, HENRY IGEL, of 85 & 87, the Side, Newcastle on Tyne, County of Northumber-
land, Engraver, do hereby declare the nature of this invention to be as follows:-
The object of my invention consists in filling the designs of ordinary_brass,
nickle, silver or any other engraved metallic plates with vulcanite which I shall
hereafter call rubber or with celluloyd so as to make same a permanent fixture into
the said engraved designs and to obviate all possibility of porosity or blow-holes in
the rubber filling, and without increasing the thickness of the metal plate or the
depth of cut to produce large or small engraved plates whose filling will resist the
action of the solar heat and rays without cracking, changing colour or droping out
through the expansion of the plate caused by the heat in summer and which will
not wear out easily by the usual method of cleaning; the combination of the above
results not being obtained by any other method hitherto used for filling engraved
metallic plates.
I perform the same in the following manner-
I use ordinary metallic plates engraved in the usual manner, that is with
bright cuts having perpendicular or sloping sides, I prefer to use those with. per-
pendicular sides or I undercut the same, and after removing from the said engraved
designs all traces of dirt I perforate the bottom of all the engraved spaces with
holes preferably larger at the back of the plate than at the base of the engraving
and then I fill all the engraved designs with rubber of the desired colour which
afterwards is vulcanized in a vulcanizer until hard celluloyd can be used, but I
prefer rubber similar to that employed by dentists for filling the freted metallic
plates used for the palate of artificial teeth.
The said holes or perforations have for their object--
1st the permanent fixing of the rubber into the engraved designs by the rubber
passing through the said holes and forming itself after hardening into the form
of rivets or buttons which are part and parcel of the rubber filling the engraving---
2nd the obviating of porsity or blowholes by allowing a free passage to the
sulphur or any vapour eliminated in the process of vulcanizing, which otherwise
would have no way of escape from the rubber parts directly in contract with the
base of the engraved designs. After the rubber is thus fixed and hardened the
engraved plate and filling is polished in the usual manner.
By the above described method or any modification thereof of perforating the
engraved designs I am enabled to fix permanently the rubber into the engraved
designs of ordinary large or small metallic plates of the usual thickness, and thus
produce cheap and neat engraved plates with a durable filling which can not drop
out, wear or be affected by the solar heat or rays.
Signed and dated this 4th day of March in the year of the Lord One thousand
eight hundred and ninety seven.

page_text: Improvements in Filling Engraved Metallic Plates.
I, HENRY IGEL, Engraver, of 85 & 87, The Side, Newcastle upon Tyne, County
of Northumberland, 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 :-
The object of my invention consists in filling the designs of ordinary brass,
nickel, silver or any other engraved metallic plates with vulcanite, which I shall
hereafter call rubber, or with celluloid so as to make same a permanent fixture into the
said engraved designs; and to obviate all possibility of porosity or blow holes in
the rubber filling, and without increasing the thickness of the metal plate or the
depth of cut to produce large or small engraved plates whose filling will resist the
action of the solar heat and rays without cracking, changing color or dropping out
through the expansion of the plate caused by the heat in summer, and which will
not wear out easily by the usual method of cleaning; the combination of the
above results not being obtained by any method hitherto used for filling engraved
metallic plates.
"I perform the same in the following manner-
I use ordinary metallic plates engraved in the usual manner that is with bright
cuts having perpendicular or sloping sides; I prefer to use those with perpendicular
sides or I undercut the same and I perforate the bottom of all the engraved spaces
with holes P Fig: 5 4 & 7 preferably larger at the back of the plate than at the
base of the engraving, as shown & illustrated in Fig. 1 & 3, by drilling or punching
or by having the plates rolled previous to engraving with indentations, as I Fig. 6,
or serations S Fig. 2 & 3, on one side or by any suitable means, and after removing
from the said engraved designs all traces of dirt I fill all the engraved designs with
rubber of the desired color as shown at A Fig. 1 & 3 which represent a section
through a filled plate; which afterwards is vulcanized in a vulcanizer until hard;
celluloid can be used but I prefer rubber similar to that employed by dentists for
filling the fretted metallic plates used for the palate of artificial teeth."
The said holes or perforations have for their object
1st The permanent fixing of the rubber into the engraved designs by the rubber
passing through the said holes and forming itself after hardening into the form of
rivets or buttons B Fig. 1 & Fig. 3, which are part and parcel of the rubber filling
the engraving,
2nd The obviating of porosity or blow holes by allowing a free passage to the
sulphur or any other vapor eliminated during the process of vulcanizing which
otherwise would have no way to escape from the rubber parts directly in contact
with the base of the engraved designs.
After the rubber is thus hardened the engraved plate and filling are polished in
the usual manner, by the above described methods or any modification thereof of
perforating the base of the engraved designs I am enabled to fix permanently the
rubber into the engraved designs of ordinary large or small metallic plates of the
usual thickness and thus produce cheap and neat engraved plates with a durable
filling which can not drop out wear or be affected by the solar heat or rays.
In the accompanying illustrations Fig. 1 is a sectional view of a perforated and
filled plate Fig. 2 a serated plate Fig. 3 a section showing a filled serated plate 4
Fig. 4 an engraved serated plate showing the perforations, Fig. 5 an engraved
plate showing holes by drilling or punching. Fig. 6, an indented plate showing
one design of indentations others such as round, oval, quadrangular or irregular
being likewise suitable this refers also to the other methods of perforation or

page_text: seration. Fig. 7 shows an engraved indented plate and perforations Fig. 8, a
finished plate the letters being filled and polished. The letters represent the same
thing right through the illustrations.
A rubber filling B buttons formed by the rubber passing through perforations.
I base of the engraved design P perforations I indentations S serations &
M metallic plate.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is:- _
1st. The use of vulcanite celluloid and the like in conjunction with engraved
metallic plates as herein ascertained and described.
2nd. The perforating of the base of the engraved designs as herein set forth and
for the purpose specified and substantially described.
3rd. The combination of vulcanite celluloid and the like with perforations pro-
duced as described and by which means buttons or rivets are formed for the purpose
herein 'set forth and substantially as described and specified.
Dated this 4th day of January 1898.