US1351584A - Dental mold-cup - Google Patents

Dental mold-cup Download PDF

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Publication number
US1351584A
US1351584A US340893A US34089319A US1351584A US 1351584 A US1351584 A US 1351584A US 340893 A US340893 A US 340893A US 34089319 A US34089319 A US 34089319A US 1351584 A US1351584 A US 1351584A
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United States
Prior art keywords
cup
mold
dental mold
dental
cavities
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Expired - Lifetime
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US340893A
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Charles A Palmer
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Individual
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/12—Tools for fastening artificial teeth; Holders, clamps, or stands for artificial teeth
    • A61C13/16—Curing flasks; Holders therefor

Definitions

  • This invention relates to detail mold cups; and its object is the improvement ot mold cups whereby the manufacture of tooth-inlays is facilitated.
  • the invention consists in a substantially cylindrical cup having cavities in its opposite ends which are connected by an axially disposed opening.
  • the invention further consists in. producing a cup of this character from a moisture absorbent material.
  • Figure l is a side elevational view and Fig. 2 is an end view of a mold cup embodying the present invention.
  • Figs. 3, 4 and 5 are longitudinal sectional views of the same to illustrate the application of the invention.
  • the cup in its opposite ends the cup is provided with conoidal cavities B and C which are communicatively connected by a relatively small hole I) disposed axially of the cup.
  • a pattern E of wax or the like taken of a tooth cavity is first given a thin coating of clayey substance conventionally known as investment, and is impaled upon a wire sprue F of a diameter to fit within the hole D in which the sprue is inserted and thereby held in upright posiin proximity of the center of the cavity B, as shown in Fig. 3.
  • the pattern is next embedded in a plastic investment G, Fig. *i. which is quickly dried by having the water extracted therefrom by being absorbed by the material of the containing cup.
  • the cup is then exposed to the action of a blowpipe flame, or an equivalent. to cause the moisture to be evaporated from the cup. complete the hardening of the investment and raise the temperature of the latter suiti- Specification of Letters Patent.
  • the cup is then inverted into its Fin". Ft position the spruc i removed from the cup and a piece of metal ii. such. for example. as a gold nugget is placed in the cavity t. The flame is again applied to render the cup hot and effect the melting of the metal which is caused to How or he forced through the hole 1) t till the mold formed by the pattern I) in the investment G.
  • a piece of metal ii. such. for example. as a gold nugget
  • the forcing of the molten metal through the cup hoie may be accomplished by any well known suitable means.
  • the cup and investment are. then broken a way to release the casting or inlay from the mold.
  • the invention is of inexpensive construction. convenient to use. and etlicient in producing: a high quality of Work.
  • dental mold-cup consisting of :1 cylindrical body made of porous material havingr water absorbent characteristics.
  • said cup belie provided in each end with a conoidal cavity which cavities are coninutniratir ly connect d by a sin: hole wherein a spine wire can be supported by the cup struetuie in a combination.
  • a dental molilecup consisting" of a body having, cavities at its opposite ends connected by axially disposed hole. a sprue wire adapted to lit within said hole and thereby be retained in position to extend into both of the cavities, and an in vestinent for producing a mold about a. pattern impaled upon said wire in one of said cavities.

Description

C. A. PALMER.
DENTAL MOLD CUP.
APPLICATION FILED NOV. 26, I919.
1, 35 1 584, Patented Aug. 31, 1920.
INVENTOR 1 CfiaI/fs A. Pa/nrer ATTORNEY tion to retain the pattern UNITE STATES TT- Oi FEQE.
DENTAL MOLD-CUP.
Application filed November 26, 1919.
To all whom it may oncern lie. it known that I. (linniLns A. Paniunn a citizen ot the United States, residii'igat Heattle. in the count of King and State of Washington. have invented certain new and useful improvements in Dental iiiolil-'-.nps. of which the following is a specification.
This invention relates to detail mold cups; and its object is the improvement ot mold cups whereby the manufacture of tooth-inlays is facilitated.
The invention consists in a substantially cylindrical cup having cavities in its opposite ends which are connected by an axially disposed opening. The invention further consists in. producing a cup of this character from a moisture absorbent material.
In the accompanying drawings. Figure l is a side elevational view and Fig. 2 is an end view of a mold cup embodying the present invention. Figs. 3, 4 and 5 are longitudinal sectional views of the same to illustrate the application of the invention.
In carrying out my invention I )rovide a cup A of a cylindrical form, pre erabl'y, made of a porous material having water absorbing characteristics.
in its opposite ends the cup is provided with conoidal cavities B and C which are communicatively connected by a relatively small hole I) disposed axially of the cup.
In using the cup, a pattern E of wax or the like taken of a tooth cavity is first given a thin coating of clayey substance conventionally known as investment, and is impaled upon a wire sprue F of a diameter to fit within the hole D in which the sprue is inserted and thereby held in upright posiin proximity of the center of the cavity B, as shown in Fig. 3.
The pattern is next embedded in a plastic investment G, Fig. *i. which is quickly dried by having the water extracted therefrom by being absorbed by the material of the containing cup.
The cup is then exposed to the action of a blowpipe flame, or an equivalent. to cause the moisture to be evaporated from the cup. complete the hardening of the investment and raise the temperature of the latter suiti- Specification of Letters Patent.
Patented Aug. 31, 1920.
Serial No. 340.393.
ciently to effect the destruction oi the wax pattern.
The cup is then inverted into its Fin". Ft position the spruc i removed from the cup and a piece of metal ii. such. for example. as a gold nugget is placed in the cavity t. The flame is again applied to render the cup hot and effect the melting of the metal which is caused to How or he forced through the hole 1) t till the mold formed by the pattern I) in the investment G.
The forcing of the molten metal through the cup hoie may be accomplished by any well known suitable means.
The cup and investment are. then broken a way to release the casting or inlay from the mold.
in the practice oi my invention, best rc- Hllll'f-l are obtained with what may be termed absorbent investments from which the uiois ture may be readily withdrawn by being absorbed by the cup and hardens when heat is applied to the latter rather than that type of investments which crystallizes in setting.
The invention is of inexpensive construction. convenient to use. and etlicient in producing: a high quality of Work.
What l claim. is-
i. dental mold-cup consisting of :1 cylindrical body made of porous material havingr water absorbent characteristics. said cup belie: provided in each end with a conoidal cavity which cavities are coninutniratir ly connect d by a sin: hole wherein a spine wire can be supported by the cup struetuie in a combination. a dental molilecup consisting" of a body having, cavities at its opposite ends connected by axially disposed hole. a sprue wire adapted to lit within said hole and thereby be retained in position to extend into both of the cavities, and an in vestinent for producing a mold about a. pattern impaled upon said wire in one of said cavities.
Signed at tiattle. Washington. this lTth day of November 1919.
CH A RLE S A P A LM E R.
US340893A 1919-11-26 1919-11-26 Dental mold-cup Expired - Lifetime US1351584A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322187A (en) * 1965-03-01 1967-05-30 Weissman Bernard Apparatus for casting by the lost wax process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322187A (en) * 1965-03-01 1967-05-30 Weissman Bernard Apparatus for casting by the lost wax process

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