Patent US5164862A successfully refreshed from Google Patents.
Patent EP0193514B1 successfully refreshed from Google Patents.
EP0193514B1
Expired / Lapsed
EP
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Method and apparatus for the polymerization of resins
Assignee: Individual
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Filing: 1986-01-28
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Granted: 1990-08-08
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Expires: 2006-01-28
Abstract
No abstract record available.
Inventors
- 👤 Jean-Paul Henri De Clerck
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 23:04
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/01; A61C13/04; A61C13/20; A61C13/203
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
263 words
A method for polymerizing resins (1) in a mould (2), notably in a muffle (2) for manufacturing dental prosthesis, this mould being subjected to micro-waves generated by at least one magnetron (3) and directed by at least one waveguide (4) ending in a radiating-surface antenna (5), this process using a muffle (2) with solid walls, made either of a material the micro-waves may go through with the radiating-surface antenna (5) arranged outside the mould, or of a material reflecting the micro-waves with the radiating-surface antenna (5) arranged inside the mould,this process comprising the following steps: the wax model located on the plaster thereof (11) is placed in the muffle (2) and is secured against motion by means of a muffling mass (12) the micro-waves may go through, this mass having a good heat conductivity as well as suitable grain fineness and mechanical strength, said mass (12) is allowed to harden, the muffle (2) is subjected to the micro-waves, the muffle is opened, the muffling mass (12) is relieved from the melted wax, the model plaster (11) and the muffling mass (12) are scalded, the open muffled (2) is exposed to micro-waves to dry the content thereof, the muffle is allowed to cool, the walls of the cavity to be tamped with resin are lined with a material preventing said resin to adhere to said plater (11) and muffling mass (12), this cavity is tamped with prepared resin (1), the muffle is closed, the muffle is exposed to micro-waves, the muffle is then allowed to cool and the prosthesis is removed from the muffle.
Claim 2
Independent Claim
263 words
A method for polymerizing resins (1) in a mould (2), notably in a muffle (2) for manufacturing dental prosthesis, this mould being subjected to micro-waves generated by at least one magnetron (3) and directed by at least one waveguide (4) ending in a radiating-surface antenna (5), this process using a muffle (2) with solid walls, made either of a material the micro-waves may go through with the radiating-surface antenna (5) arranged outside the mould, or of a material reflecting the micro-waves with the radiating-surface antenna (5) arranged inside the mould,this process comprising the following steps: the wax model located on the plaster thereof (11) is placed in the muffle (2) and is secured against motion by means of a muffling mass (12) the micro-waves may go through, this mass having a good heat conductivity as well as suitable grain fineness and mechanical strength, said mass (12) is allowed to harden, the muffle (2) is subjected to the micro-waves, the muffle is opened, the muffling mass (12) is relieved from the melted wax, the model plaster (11) and the muffling mass (12) are scalded, the open muffled (2) is exposed to micro-waves to dry the content thereof, the muffle is allowed to cool, the walls of the cavity to be tamped with resin are lined with a material preventing said resin to adhere to said plater (11) and muffling mass (12), this cavity is tamped with prepared resin (1), the muffle is closed, the muffle is exposed to micro-waves, the muffle is then allowed to cool and the prosthesis is removed from the muffle.
Claim 3
Dependent Claim
43 words
A method according to claim 1, characterized in that a heat sensor (8) is arranged either outside or inside the muffle (2) in order that it is subjected to micro-waves and the magnetron (3) is controlled by the data provided by the sensor.
Claim 4
Dependent Claim
21 words
A method according to claim 2, characterized in that the heat sensor (8) is placed in a reference resin body (7).
Claim 5
Dependent Claim
58 words
A method according to claim 3, characterized in that it is provided, in the muffling mass (12), a recess for receiving the heat-reference resin body (7), this body is arranged in the recess thereof while simultaneously said cavity is filled with prepared resin (1) and the heat sensor (8) is fixed in position inside said reference resin (7).
Claim 6
Independent Claim
31 words
A method according to any one of claims 1 to 4, characterized in that the micro-wave frequency is modulated to avoid local and fixed concentrations of stationary waves inside the mould.
Claim 7
Dependent Claim
85 words
An equipment for the working of the method according to any of claims 1 to 5, and comprising at least one mould or muffle (2), at least one magnetron (3) and at least one waveguide (4) ending with a radiating-surface antenna (5), characterized in that the mould or muffle (2) is comprised of four solid-wall parts (14,15,16,17), two bottom and top covers (14, 17) and two superposable hollow elements (15, 16) comprising the muffle side walls, means (18) being provided for assembling said four parts.
Claim 8
Dependent Claim
138 words
An equipment according to claim 6, characterized in that the four parts (14,15,16,17) are in the shape of disks with substantially equal diameters, those disks comprising both said superposable element (15 and 16) being hollowed in the center portion thereof to form recesses (19' and 20') in the shape of truncated pyramids, said assembly means (18) comprising at least three screwbolts (19) the shanks of which pass through holes provided through the disks in parallel relationship with the axis thereof and spaced by 120° relative to each other, said four parts being made from a material such as synthetic resin, ceramics, high-strength glass, which lets the micro-waves go through, the muffle (2) resulting from said four parts being intended to be used inside an enclosure with reflecting walls, wherein at least one said radiating-surface antenna (5) is arranged.
Claim 9
Dependent Claim
57 words
An equipment according to claim 7, characterized in that it comprises a muffle holder (35) for spacing the muffle metal parts from said reflecting surfaces, said holder being comprised of a hollow cylinder the inner diameter of which is slightly larger than the disk diameter, means (36) being provided to limit the muffle displacement inside the holder.
Claim 10
Dependent Claim
101 words
An equipment according to claim 6, characterized in that said four parts (14, 15, 16, 17) are made from a material which reflects the micro-waves, the cover-forming parts (14 and 17) having that side thereof which will face the muffle inside, provided with facets which are so directed as to reflect the micro-waves in every direction, at least one of the covers (14, 17) comprising at least one radiating-surface antenna (5) at the level with that side to be facing the muffle inside, both said superposable elements (15 and 16) each having a recess (19', 20') with a smooth inner wall.
Claim 11
Dependent Claim
55 words
An equipment according to any of claims 6 to 9, characterized in that it comprises at least one heat sensor (8) and a system for controlling said magnetron with the data provided by said sensor (8), said system comprising a magnetron-regulating processor, possibly with an amplifier (44) for the signals generated by said sensor (3).
Claim 12
Dependent Claim
41 words
An equipment according to claim 10, characterized in that, when the heat sensor (8) lies inside the muffle (2), one of the parts (14, 15, 16, 17) is provided with an opening for the passage of the connections of the sensor.
References Cited (Backward Citations)
No citation records indexed.
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