US2568072A - Denture tray - Google Patents

Description

P 1951 A. JUTRAS 2,568,072

DENTURE TRAY Filed June 16, 1950 Zm zo/om Patented Sept. 18, 1951 UNITED STATES PATENT OFFICE DENTURE TRAY I Arthur utras Saint Hyacintlie, Application june 1s, use-sunrise.- Isa-58s;

4 Claims. (oi'ez i'ii' 'The present invention pertains to a novel'idental tray for receiving plaster or other plastic material in making impressions of the gums and palate.

The principal object of the invention is to pro- .vide a denture tray that is not entirely solid so that it will not compress or deform the palate and gumsto be impressed. Another object is to provide a tray in which the flexible portion may be provide a tray which is of simple construction and economical to manufacture.

In the accomplishment of these objects, the

tray consists of a metal member in the form of an upper or lower denture, partial or complete. The lower edge of this member is curved outwardly and receives a similarly curved piece of rubber forming the bottom. The lower edge of the tray is preferably toothed or notched in order to attach more securely to the rubber piece.

The invention is fully disclosed by way of example in the following description and in the accompanying drawings in which:

Figure 1 is a perspective view of the frame of the tray;

Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is a perspective view of the complete tray;

Figure 4 is a vertical section illustrating the use of the device;

Figure 5 is a section on the line 5-5 of Figure 1;

Figure 6 is a similar section of a tray for the lower denture;

Figure '7 is a section on the line 1-'| of Figure 3;

Figure 8 is a similar section of a tray for the lower denture;

Figure 9 is a perspective view of a modified lower denture tray;

Figure 10 is a perspective view of a modified upper denture tray;

Figure 11 is a perspective view showing a handle applied to a tray;

Figure 12 is a section on the line I2-I2 of Figure 11;

Figure 13 is a perspective view showing a modifled handle applied to a tray, and

Figure 14 is a section on the line l4l4 of Figure 13.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

ln- Figures l and 2 isshown a metal member I shaped to reeeiise an upper denture. This member is in the nature of a frame of somewhat heart-shape, laminated or molded, and having an internal rear vertical wall 2 and sloped downward and rearward at 3 at the front.

The upper edge is bent outward at 4 at the rear, and the lower edge is bent outward and upward at 5 at the front to form a U-channel. At regular intervals the edge of the bend 5 is toothed at 6 for the attachment of a rubber bottom piece 1 which also has a doubled edge 8 to be received within the bend 5 or channel.

The sectional views shown in Figures 6 and 8 pertain to lower dentures. As this tray is not in the form of a basin but rather a channel, its. contour is similar to that shown in Figure 9. Figures 6 and 8 illustrate the doubled edges 9 on both the inner and outer sides of the channel for receiving a piece of rubber l0 (Figure 8) at its doubled edges ll.

Figures 9 and 10 show a simpler method of making upper and lower denture trays. The inher wall l2 of the frame I3 is vertical, and this is easier to form than the diverging wall 3 of Figure 1. The doubled or bent edge 5 remains as above described, as well as the teeth 6. In the tray for the upper denture, shown in Figure 10, the internal wall I 4 is also vertical while the edge 5" and teeth 6" remain as above described.

As shown in Figure 4, the tray receives a quantity of plaster I5, after the wall has been lined with wax or other suitable plastic material I6 for better tightness. It is understood that, in order to take a good impression of the gums I! and palate [8, it is necessary to compress the tray. Heretofore, the metal tray of spoon. form pushed the plaster against the palate, deforming it until it became flexible. The impression thus made had a crown that did not conform to the shape of the palate. The resulting dentures injured the palate and never adapted themselves thereto.

In the present invention, the bottom or center of the tray being flexible because of the rubber sheet I which permits displacement of the plaster l5, the plaster is distributed over the palate but does not exert more pressure in one area than in another. The flexibility of the piece l permits it to receive a surplus of plaster and prevents a non-uniform pressure on the palate. The same is true of the gums since they are enclosed in the pieces 1 and Ill.

The trays can also be used with the usual handles or holders. In Figures 11 .and 12 a flat handle 20 is riveted to the bottom of the upper denture tray 2| at the front. In Figures 13 and 14 an angled handle 22 is riveted to the front bottom of the lower denture tray 23. The handles are used only in starting an impression, and the impression completed by use of rubber sheet, as described, attached to the lip 24 or 25.

Although specific embodiments of the invention have been illustrated and described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention as indicated by the appended claims.

What I claim is:

1. In a denture tray, a frame adapted to receive the gum, an outwardly and upwardly curved lower edge integral on said frame, and

a flexible bottom adapted for attachment to said edge.

3. In a denture tray, a frame adapted to receive the gum, an outwardly and upwardly curved lower edge integral on said frame, said edge being toothed, and a flexible bottom adapted for attachment to said edge.

4. A denture tray comprising a frame having an enclosing wall, a shorter wall surrounding the first wall and secured thereto in spaced relation, the upper edge of the second wall being toothed, and an elastic sheet shaped to span the enclosure for the first wall and attached to v the second wall.

2. In a denture tray, a frame adapted to re- 20 ceive the gum, anoutwardly curved lower edge integral on said frame, said edge being toothed, and a flexible bottom adapted for attachment to said edge.

ARTHUR J UTRAS.

REFERENCES CITED UNITED STATES PATENTS Name Date Ryerson Aug. 2'7, 1929 Number

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