Improvements in or connected with the Firing of Pottery.
Year: 1890

page_text: Date of Application, 21st Aug., 1890
Complete Specification Left, 14th May, 1891-Accepted, 20'h June, 1891
PROVISIONAL SPECIFICATION.
Improvements in or connected with the Firing of Pottery.
I, LOUIS HARTMANN JAHN of 15 Church Street, Hanley in the County of
Stafford, Artist, do hereby declare the nature of this invention to be as follows:-
The invention applies principally to such ware as cups (tea, coffee and breakfast
cups) and to milk and other basins but is also applicable to all such articles as have
hitherto had rings placed on or between them for the purpose of securing their
correct outline during the firing process and also of facilitating the placing of the
ware in the oven.
According to my invention I dispense entirely with such rings thereby effecting
a great saving in the expense attendant on the firing of such articles and I also
obtain a better result than by the employment of rings.
My invention consists in the use of a suitable gummy or adhesive solution or
preparation applied to the rims and other parts of cups of all descriptions, milk and
other basins and other articles, and while such solution or preparation is still wet
placing the rims or other parts together one on the top of another; when such
solution or preparation is dry the articles will adhere firmly together and remain so
during the firing process, keeping each other in their correct outline, but after firing
such articles can be readily separated.
The material I have found to answer is a solution of gum tragacanth or adragant
into which are dipped the rims or other parts of the articles to be temporarily
connected together for the firing process, or such solution can be applied by
pencilling or otherwise as may be found most convenient.
LOUIS H. JAHN.
By Harris & Mills,
23, Southampton Buildings, London, Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with the Firing of Pottery.
I, LOUIS HARTMANN JAHN, of 15 Church Street, Hanley, in the County of
Stafford, Artist, 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 invention applies principally to such articles of pottery manufacture as cups
(tea, coffee and breakfast cups) and to milk and other basins, but is also applicable
to all such articles which for the purpose of securing their correct outline during
the firing process or for facilitating the placing of such ware in the saggars for
firing in the oven have hitherto had rings put on or between them.
According to my invention I dispense entirely with such rings, thereby effecting
a great saving in the expense attendant on the firing of such articles, and I also
obtain a better result than by the employment of rings.
In the accompanying drawings,
In
Figure 1 represents an elevation partly in section of two cups a, a with a ring bplaced
between them as hitherto used for placing in the saggars for firing in the oven.
this case the weight of the upper cup or cups and of the ring or rings combined
with the inclined faces of the latter is alone relied upon to maintain the cups in true
form during the firing process; this plan is not altogether satisfactory, as when
placing such articles in the saggars or oven, they are likely to be shifted in position,

page_text: and during the firing process they are also liable to become distorted as they are
not firmly or securely held in relation with each other or with the rings. My
invention consists in the use of a suitable gummy or adhesive solution or prepara-
tion applied to the rims and other parts of cups of all descriptions, milk and other
basins, and other articles, and while such solution is still wet, placing the rims or
other parts together one on the top of another as represented at Figure 2, which
latter is an elevation of two cups a. a cemented together by their rims according to
my invention. When the cementing solution or preparation is dry, the articles will
adhere firmly together and remain so during the firing process, keeping each other
in their correct outline, but after firing, such articles can be readily separated. The
material I have found to answer is a solution of gum tragacanth or adragant, into
which are dipped the rims or other parts of the articles to be temporarily connected
together for the firing process, or such solution can be applied by pencilling or
otherwise as may be found most convenient. Cups or other articles cemented
together as herein described not only retain their correct form during the firing
process, but are not liable to shift their relative positions whilst being placed in the
ovens or saggars.
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 :-
The method of preparing cups and other articles for the firing process by
cementing their rims or other parts together by means of a gummy or adhesive
solution or preparation such for instance as a solution of gum tragacanth or gum
adragant, substantially as herein described and for the purpose stated.
Dil M. 1001
LOUIS HARTMANN JAHN.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.