Improvements in the Gelatining of Showcards and the like, and in the Preparation of Gelatine, for the purpose.
Year: 1895

page_text: Date of Application, 12th July, 1895
Complete Specification Left, 7th Apr., 1896-Accepted, 23rd May, 1896
PROVISIONAL SPECIFICATION.
Improvements in the Gelatining of Showcards and the like, and in
the Preparation of Gelatine, for the purpose.
We, HEBER MARDON of the Firm of Mardon Son and Hall of the Caxton
Works, Bristol, Manufacturing Stationers and THOMAS CONN of Rosedale,
St. John's Lane, Bedminster Bristol, Foreman, do hereby declare the nature of
this invention to be as follows:-
In the gelatining of show cards and the like in order to impart an enamelled or
glazed face thereto, it has been usual to first soften the gelatine by steeping it in
cold water for 12 to 14 hours, to then dissolve it in water by heating in a jacketted
pan or otherwise, next to flow or run this solution of gelatine upon a sheet of glass
and after the gelatine has set and is in a sort of tacky state to place the showcard
upon it face downward and to roll or squeeze the card upon the glass, the result
being that the showcard becomes faced with the gelatine. A board or other
backing is then applied to the show card and when dry the whole is removed from
the glass. Unless the enamelled or glazed face thus imparted to the showcard is
subsequently varnished it loses its glaze if washed with either warmn
water.
or cold
Now according to our invention we gelatine the surface of showcards and the
like in such a manner that they have imparted to them a better enamelled or
glazed face than by the old method while the face without having been subsequently
varnished or otherwise treated will not be affected by washing even with warm
water.
According to our invention, after softening the gelatine by steeping in cold
water and then dissolving it as usual in water by heating in a steam jacketted pan
or otherwise, say about 6 pounds of the gelatine to 10 quarts of water, we add to
the solution when almost at boiling point about 2 ounces of common alum and
2 ounces of formaldehyde with preferably ounce of chrome alum. The chrome
alum is not essential and when it is used a suitable acid should also be added to
prevent the chrome alum from coagulating the gelatine; about one pound of acetic
acid (commercial strength) will answer the purpose. We weil incorporate the
ingredients of the mixture and then strain it. We flow or run it upon glass which
has previously been coated with a mixture of oxgall and formaldehyde in the
proportion of about 8 parts of the former to one of the latter. When this gelatine
solution has set so that the finger moistened with water can be moved over it
without breaking the film, the film being in a somewhat tacky state, we apply to
the surface by a sponge or otherwise a slight coating of water and formaldehyde in
the proportion of about 8 parts of the former to one of the latter. We damp the
face of the showcard with the same mixture, then apply the card to the glass and
roll or squeeze it thereon. When the showcard is dry a board or other backing is
mounted thereon as usual and when dry the whole is removed from the glass.
By this method the show card receives a highly polished enamelled or glazed
face which without varnishing or other treatment can be washed with warm water
without being injuriously affected.
Dated this 10th JCL1 1005
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.

page_text: Improvements in the Gelatining of Showcards and the like, and in
the Preparation of Gelatine for the purpose.
We, HEBER MARDON of the Firm of Mardon Son and Hall of the Caxton
Works, Bristol, Manufacturing Stationers and THOMAS CONN of Rosedale,
St. John's Lane, Bedminster, Bristol, Foreman, 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 :-
In the gelatining of show cards and the like in order to impart an enamelled or
glazed face thereto, it has been usual to first soften the gelatine by steeping it in
cold water for 12 to 14 hours, to then dissolve it in water by heating in a jacketted
pan or otherwise, next to flow or run this solution of gelatine upon a sheet of glass
and after the gelatine has set and is in a sort of tacky state to place the showcard
upon it face downward and to roll or squeeze the card upon the glass, the result
being that the showcard becomes faced with the gelatine. A board or other
backing is then applied to the showcard and when dry the whole is removed from
the glass. Unless the enamelled or glazed face thus imparted to the showcard is
subsequently varnished it loses its glaze if washed with either warm or cold
water.
Now according to our invention we gelatine the surface of showcards and the
like in such manner that they have imparted to them a better enamelled or
glazed face than by the old method while the face without having been subsequently
varnished or otherwise treated will not be affected by washing even with warm
water.
According to our invention, after softening the gelatine by steeping in cold
water and then dissolving it as usual in water by heating in a steam jacketted pan
or otherwise, say about 6 lbs. of the gelatine to 10 quarts of water, we add to the
solution when almost at boiling point about 2 ounces of common alum and 2 ounces
of formaldehyde with preferably ounce of chrome alum. The chrome alum is not
essential and when it is used a suitable acid should be added to prevent the chrome
alum from coagulating the gelatine; about 1 pound of acetic acid (commercial
strength) will answer the purpose. We well incorporate the ingredients of the
mixture and then strain it. We flow or run it upon glass which has previously
been coated with a mixture of oxgall and formaldehyde in the proportion of about
8 parts of the former to one of the latter. When this gelatine solution has set so
that the finger moistened with water can be moved over it without breaking the
film, the film being in a somewhat tacky state, we apply to the surface by a sponge
or otherwise a slight coating of water and formaldehyde in the proportion of
about 8 parts of the former to 1 of the latter. We damp the face of the show-
card with the same mixture, then apply the card to the glass and roll or squeeze it
thereon. When the showcard is dry a board or other backing is mounted thereon
as usual and when dry the whole is removed from the glass.
Instead of or in addition to applying a coating consisting of water and formal-
dehyde to the glass when the gelatine solution thereon has set and to the face of
the card as above described a coating of the mixture of water and formaldehyde
may be applied to the back of the card after the card has been applied to the
gelatine on the glass and is adherent to it and has become dry.
By the gelatining of showcards in the manner hereinbefore described the
showcards receive a highly polished enamelled or glazed face which without
varnishing or other treatment can be washed with warm water without being
injuricusly affected, it being in fact insoluble.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :--
1. The gelatining of showcards and the like, substantially as herein before
described whereby they receive an enamelled or glazed face which without
varnishing or other treatment can be washed with warm water without being
injuriously affected.
2. The preparation of gelatine substantially in the manner herein before described.
to adapt it for the gelatining of showcards and the like as set forth.
11000
J. C. MEW BURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.