Improvements in the Manufacture of Artificial Teeth.
Year: 1893

page_text: Date of Application, 9th Feb., 1893
Complete Specification Left 8th Nov.. 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Artificial Teeth.
I, CHARLES FREDERICK RUTTERFORD of 11 Poland Street, in the County of
Middlesex, Dentist and Dental Manufacturer do hereby declare the nature of this
invention to be as follows:-
My invention relates to improvements in the manufacture of artificial teeth,
whereby they are not affected by the backing of metal, rubber or other substances
at present used. To effect this I paint, or otherwise cover the back of the tooth,
with an opaque mineral substance, retained in its position by being burnt in during
the course of the manufacture of the tooth, or by a further operation.
Dated this 2nd day of February 1893.
LE FEVRE & Co.,
26, Budge Row, Cannon Street, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Artificial Teeth.
1, CHARLES FREDERICK RUTTERFORD of 11 Poland Street in the County of
Middlesex Dentist and Dental 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 improvements in the manufacture of artificial teeth,
whereby they are not affected injuriously by any backing of metal, rubber, or other
material used to attach them to the plate.
I accomplish this by painting with a brush or otherwise covering the back or
part of the back of the tooth with an opaque mineral substance composed of the same
or similar material as the tooth itself, and clay or other similar substance to render
it opaque. In those cases when the white opaque substance might be conspicuous, I
may after applying the before mentioned mineral substance cover it with a thin
coat of a material of the same or similar composition as the tooth itself, thereby
practically enclosing the opaque mineral substance in with the tooth.
mineral backing is preferably effected by any of the following means:-
This
I may paint or otherwise cover the back of the tooth with the opaque mineral
when it is taken from the mould, or I may paint or otherwise cover the mould or
portion of the mould before the tooth is moulded in such a manner that when the
tooth is taken out from the mould the opaque mineral substance adheres to it and
is afterwards baked in or 1 may bake the tooth first and then paint or otherwise
cover the back with the opaque mineral substance and bake it in by a second
firing.
All bodies of artificial teeth at present made are more or less translucent
permitting the backing of metal, rubber, or whatever material is used in attaching
the tooth to the plate, casting its shadow and more or less injuriously affecting the
appearance of the tooth this being more noticeable in the lighter shades and in the
thinner teeth.
This is effectually prevented by the presence of the opaque mineral substance,
which also adds a lifelike character to the tooth that is not obtained under the
conditions at present employed.
In the accompanying drawings,
T
the hooking

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 :-
The backing of artificial teeth with a composition composed of the same or similar
material as the tooth, and clay, or other similar substance to render it opaque for
the purpose described and set forth.
Dated this 8th day of November 1893
LE FEVRE & Co.,
26, Budge Row, Cannon Street, E.C., Agents.