US3600752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for making dental casting patterns
Assignee: Individual
•
Filing: 1969-01-23
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Granted: 1971-08-24
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Expires: 1989-01-23
Abstract
Abstract An apparatus for making casting patterns to be used in the casting of articles of manufacture having a thin wall thickness in at least a portion thereof is provided. The apparatus comprises means for supporting at least one dental die model of at least one tooth form from an individual. The apparatus also includes a means to support a sheet of thermoplastic material and means for heating the sheet of thermoplastic material to a softened condition. A means is provided to apply the softened or plasticized sheet to the dental die model thereby forming an accurate reproduction thereof. The apparatus includes means to effect a different air pressure on each side of the sheet which fits over the dental die model to aid in the formation of the accurate reproduction thereof.
Inventors
- 👤 Erich Kopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:38
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/10; A; A61; A61C; A61C13/00; A61C13/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
190 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, b. said die model support means including a working table located at the lower portion of the apparatus and a container for receiving an imbedding compound in which the die model is imbedded with a portion projecting thereabove, c. said container being located on the working table, d. means to support a sheet of thermoplastic material above the dental die model, e. said sheet supporting means including pillars mounted on said working table, a supporting plate vertically guided on said pillars, biasing means to urge the supporting plate away from the container and clamping means to detachably mount the sheet of thermoplastic material over the container, f. said supporting plate including means to simultaneously clamp a compensating second sheet of material adjacent said sheet of thermoplastic material above the die model, g. means to heat the thermoplastic material of the first sheet to a softened condition and h. means for conforming the softened sheet to the dental die model to form an accurate reproduction thereof.
Claim 2
Independent Claim
190 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, b. said die model support means including a working table located at the lower portion of the apparatus and a container for receiving an imbedding compound in which the die model is imbedded with a portion projecting thereabove, c. said container being located on the working table, d. means to support a sheet of thermoplastic material above the dental die model, e. said sheet supporting means including pillars mounted on said working table, a supporting plate vertically guided on said pillars, biasing means to urge the supporting plate away from the container and clamping means to detachably mount the sheet of thermoplastic material over the container, f. said supporting plate including means to simultaneously clamp a compensating second sheet of material adjacent said sheet of thermoplastic material above the die model, g. means to heat the thermoplastic material of the first sheet to a softened condition and h. means for conforming the softened sheet to the dental die model to form an accurate reproduction thereof.
Claim 3
Independent Claim
104 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, b. means to support a sheet of thermoplastic material above the dental die model, c. means to heat the material of the sheet to a softened condition, and d. means for conforming the softened sheet to the dental die model to form an accurate reproduction thereof, e. said die model supporting means, said heating means and said conforming means are pivotally mounted on a column with respect to each other to be moved to a plurality of working positions.
Claim 4
Independent Claim
104 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, b. means to support a sheet of thermoplastic material above the dental die model, c. means to heat the material of the sheet to a softened condition, and d. means for conforming the softened sheet to the dental die model to form an accurate reproduction thereof, e. said die model supporting means, said heating means and said conforming means are pivotally mounted on a column with respect to each other to be moved to a plurality of working positions.
Claim 5
Dependent Claim
50 words
An apparatus as defined in claim 2 wherein said heating means and conforming means are located on a rotary head that is pivotally mounted on said column, said heating means and said conforming means being horizontally displaceable with respect to each other through an angle of 90* or 180*, respectively.
Claim 6
Independent Claim
112 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, B. means to support a sheet of thermoplastic material above the dental die model, c. means to simultaneously support a compensating second sheet of material adjacent said thermoplastic first sheet of material above the die model, d. said compensating sheet being disposed between the thermoplastic material and the dental die model, e. means to heat the thermoplastic material of the first sheet of material to a softened condition, and f. means for conforming the softened sheet to the dental die model to form an accurate reproduction thereof.
Claim 7
Independent Claim
112 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, B. means to support a sheet of thermoplastic material above the dental die model, c. means to simultaneously support a compensating second sheet of material adjacent said thermoplastic first sheet of material above the die model, d. said compensating sheet being disposed between the thermoplastic material and the dental die model, e. means to heat the thermoplastic material of the first sheet of material to a softened condition, and f. means for conforming the softened sheet to the dental die model to form an accurate reproduction thereof.
Claim 8
Dependent Claim
70 words
An apparatus as defined in claim 4 wherein said conforming means includes means for stretching the softened sheet of thermoplastic material and compensating second sheet over the dental die model by an amount effective to avoid formation of folds therein and means for effecting a different air pressure on each side of said sheets after the softened sheets have been placed over the dental die model by said stretching means.
Claim 9
Dependent Claim
24 words
An apparatus as defined in claim 5 wherein said stretching means includes means to mechanically press the softened sheets over the dental die model.
Claim 10
Independent Claim
109 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth from an individual, b. means to support a sheet of thermoplastic material over the dental die model, c. means to heat the material of the thermoplastic sheet to a softened condition, d. means for stretching the softened sheet of thermoplastic material over the dental die model by an amount effective to avoid formation of folds therein and e. means for effecting a different air pressure on each side of the thermoplastic sheet after the softened sheet has been placed over the dental die model by said stretching means.
Claim 11
Independent Claim
109 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth from an individual, b. means to support a sheet of thermoplastic material over the dental die model, c. means to heat the material of the thermoplastic sheet to a softened condition, d. means for stretching the softened sheet of thermoplastic material over the dental die model by an amount effective to avoid formation of folds therein and e. means for effecting a different air pressure on each side of the thermoplastic sheet after the softened sheet has been placed over the dental die model by said stretching means.
Claim 12
Dependent Claim
25 words
An apparatus as defined in claim 7 wherein said stretching means includes means to mechanically press the softened thermoplastic sheet over the dental die model.
Claim 13
Dependent Claim
43 words
An apparatus as defined in claim 7 wherein said pressure effecting means includes means providing a positive compressed air pressure on the side of the softened thermoplastic sheet opposite the dental die model to effect the different air pressure on each side thereof.
Claim 14
Dependent Claim
71 words
An apparatus as defined in claim 7 wherein said pressure effecting means includes means providing a vacuum on the same side of the softened thermoplastic sheet as the dental die model to effect the different air pressure on each side thereof. 11 An apparatus as defined in claim 7 wherein said die model support means includes an imbedding compound in which the die model is imbedded with a portion projecting thereabove.
Claim 15
Independent Claim
180 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, b. means to support a sheet of thermoplastic material above the dental die model, c. means to heat the material of the sheet to a softened condition, d. a blower head adapted to enclose a space over the dental die model, e. a pressure cylinder having an operating member to effect movement of said blower head and f. means to apply compressed air pressure to the operating member at least in the working direction thereof thereby to move said blower head to engage said die model support means and carry along said die model support means until the softened sheet is placed against the dental die model, g. said blower head includes a front end recess which can be connected to a compressed air source via a pressure regulator to effect a pressing force onto said softened sheet against the dental die model after said sheet has been stretched downwardly over said dental die model.
Claim 16
Independent Claim
180 words
An apparatus for making dental casting patterns comprising: a. means to support at least one dental die model of a tooth form from an individual, b. means to support a sheet of thermoplastic material above the dental die model, c. means to heat the material of the sheet to a softened condition, d. a blower head adapted to enclose a space over the dental die model, e. a pressure cylinder having an operating member to effect movement of said blower head and f. means to apply compressed air pressure to the operating member at least in the working direction thereof thereby to move said blower head to engage said die model support means and carry along said die model support means until the softened sheet is placed against the dental die model, g. said blower head includes a front end recess which can be connected to a compressed air source via a pressure regulator to effect a pressing force onto said softened sheet against the dental die model after said sheet has been stretched downwardly over said dental die model.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |