Improvements in Dentists' Moulding Spoons.
Year: 1898

page_text: Date of Application, 31st Oct., 1898-Accepted, 21st Jan., 1899
COMPLETE SPECIFICATION.
Improvements in Dentists' Moulding Spoons.
We, OTTO BRENNECKE, Merchant, of 54, Königsgrätzerstrasse, and GEORG
KOBYLINSKI, Dentist, of 20, Neue Schönhauserstrasse, both in Berlin, in the
Empire of Germany, 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 moulding spoons for dental purposes,
by means of which it is possible to take exact impressions of both the upper and
lower jaws.
The chief advantages of these improved moulding spoons over those heretofore
in use, consist not only in the facility with which the mould-owing to its greater
divisibility can be removed undamaged from the mouth of the patient, but
also that the model of this impression, after the mould is filled can be just as
safely removed from the mould without destroying the impression, so that the
latter can be used again and again.
The moulding spoon is illustrated in the accompanying drawing, in which:-
Fig. 1 is a perspective view of the moulding spoon for the upper jaw, in the
closed position.
Fig. 2 is a plan view of the same in the open position.
Fig. 3 is a vertical section on the line X X of Fig. 2.
Fig. 4 is a perspective view of the moulding spoon for the lower jaw, in the
closed position.
Fig. 5 is a plan view of the same in the open position.
Fig. 6 is a vertical section of the same.
According to this invention the plate a, made in one piece for the upper and
two pieces for the lower jaw, is so jointed together with the two cheek pieces d
that the latter (after loosening a clamping screw which holds them together
whilst the mould or impression is being obtained) can be turned outwards by
means of the handles e attached to their sides, by which manipulation when
taking the impression, the mould in the mouth of the patient is parted into three
or four parts.
The plate a is provided with hinges b and c, by means of which the cheek
pieces holding the plastic moulding material and coming accurately together
at their edges, are jointed to the plate a. The cheek pieces d have at their front
flanged ends k, which come together, a clamping screw f provided with heads,
as shewn, and which firmly unite the cheek pieces d when taking an impression.
In order to secure the moulding material in the cheek pieces d, the latter are
grooved or roughened and have besides at their outer edges thin overlapping
strips g extending along a small part only of such edges.
The moulding spoon for the lower jaw is in its general characteristics similar
to that for the upper one; as however in this case the mould is comparatively
more difficult to withdraw, it is made in four pieces by providing the plate at
its front end with a hinge h in a vertical position.

page_text: In order to secure the moulding material, without however hindering the easy
withdrawal of the mould from the spoon, the cheek pieces d may be further
provided with raised strips, hollows or openings.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
A dentists' moulding spoon made in parts hinged together in such a manner
that the cheek pieces can be turned over in an outward direction, or be held
together by a clamping screw whereby the mould may be divided into several
parts in the mouth of the patient, and an undamaged impression obtained and
the same mould can be used again and again; substantially as described with
reference to the drawings.
Dated this 31st day of October 1898.
O. BRENNECKE.
G. KOBYLINSKI.
Per W. H. Beck, Agent.
115, Cannon Street, London,