SE123762C1

SE123762C1 -

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Publication number: SE123762C1
Authority: SE
Publication date: 1948-01-01

Description

KLASS 30 b:5/03 BESKRIVNING OFFENTLIGGJORD AV KUNGL. PATENT- OCH REGISTRERINGSVERKET BEVILJAT DEN 11 NOVEMBER 1948 PATENTTID FRAN DEN 2 JULI 1946 PUBLICERAT DEN 11 3ANUARI 1949 Ans. den '/, 1946, nr 5956/1946. Hartill en ritning. CLASS 30 b: 5/03 DESCRIPTION PUBLISHED BY KUNGL. PATENT AND REGISTRATION AGENCY GRANTED ON 11 NOVEMBER 1948 PATENT PERIOD FROM 2 JULY 1946 PUBLISHED ON 11 3 JANUARY 1949 Ans. den '/, 1946, No. 5956/1946. In addition, a drawing.

K. A. S. KARLSTROM, GA VLE. K. A. S. KARLSTROM, GA VLE.

Amalgampress. Amalgampress.

Vid framstallning av tandfyllningar °eh tandmocleller av amalgam är det av stor betydelse, att amalgamkondenseringen genomfores rationellt och omsorgsfullt. Anyandningen av hogvardiga och pa vetenskapliga grunder utexperimenterade amalgam dr saplunda knappast motiverad, for sa vitt icke dessa amalgam yid framstallningen av fyllningarna och modellerna ocksa fa den riktiga behandlingen. Ett mycket viktigt led i denna amalgamets behandling är avlagsnandet av overskottskvicksilver ur det just tillrorda amalgamet, innan fyllningen insereras I munnen eller modellen kondenseras. Det ar namligen ett allmant kant fOrhallande att ju mindre kvicksilver, som ingar i amalgamet, desto starkare och volymbestandigare blir detta. En star kvicksilverhalt ger daremot ett brackligt och starkt expanderande amalgam. In the production of dental fillings or dental amulets of amalgam, it is of great importance that the amalgam condensation is carried out rationally and carefully. The use of high-quality and scientifically experimented amalgam is hardly justified, since these amalgamations in the production of the fillings and models do not receive the right treatment either. A very important step in the treatment of this amalgam is the removal of excess mercury from the just agitated amalgam, before the filling is inserted into the mouth or the model is condensed. Namely, there is a general edge to the fact that the less mercury that enters the amalgam, the stronger and more volume-resistant this becomes. A rigid mercury content, on the other hand, gives a brittle and strongly expanding amalgam.

Hittills kanda amalgampressar ha den nackdelen, att kvicksilvret icke avskiljes i rent utan i mer eller mindre amalgamerat tillstand, beroende i huvudsak pa en olamplig anordning och dimensionering av de hal, springor, eller dylikt, varigenom kvicksilvret utpressas. De ha 5.ven den olagenheten, att namnda hal latt tillstoppas av stelnande amalgam, som endast med svarighet kan avlagsnas. Foreliggande uppfinning .avser att astadkomma en i detta och andra avseenden forbdttrad amalgampress. Enligt uppfinningen bestar pressen i huvudsak av en presseylinder, en med ringa spelrum i denna cylinder passande presskolv och en i forhallande till cylindern komdalt anordnad cylindrisk tapp, som bildar botten i cylindern. Cylindern och bottentappen 'aro axiellt fOrskjutbara i forhallande till varandra lampligen pa sa salt, att bottentappen är fast och cylindern forskjutbar pa tappen. Det namnda spelrummet mellan kolven och cylindern ãr enligt uppfinningen av en sadan storleksordning, att ,endast i huvudsak rent kvicksilver kan utpressas genom detsamma. Denna effekt kan astadkommas genom att reducera spelrummet till cirka 0,015 mm eller annu mindre. Ett sadant spelrum anordnas lampligen aven mellan bottentappen och cylindern, varvid bottentappen har samma diameter som kolven. Tack vare att praktiskt taget endast rent kvicksilver utpressas genom namnda spelrum, behover man icke hefara nagon igenstoppning av utloppspassagen, och det ut- pressade Overskottet av kvicksilver kan med latthet helt avlagsnas, sa att de cylindriska ytorna standigt hallas rena. Hitherto known amalgam presses have the disadvantage that the mercury is not separated in a pure but in a more or less amalgamated state, depending mainly on an unsuitable arrangement and dimensioning of the slides, cracks, or the like, whereby the mercury is extruded. They also have the disadvantage that the said hall is easily clogged by solidifying amalgam, which can only be removed with responsibility. The present invention seeks to provide an improved amalgam press in this and other respects. According to the invention, the press consists essentially of a press cylinder, a press piston fitting with little play in this cylinder and a cylindrical pin arranged in relation to the cylinder, which forms the bottom of the cylinder. The cylinder and the bottom pin are axially displaceable in relation to each other suitably on such a salt that the bottom pin is fixed and the cylinder is displaceable on the pin. The said clearance between the piston and the cylinder is according to the invention of such an order of magnitude that only substantially pure mercury can be extruded through it. This effect can be achieved by reducing the clearance to about 0.015 mm or even less. Such a clearance is suitably arranged also between the bottom pin and the cylinder, the bottom pin having the same diameter as the piston. Due to the fact that practically only pure mercury is squeezed out through the said clearance, no clogging of the outlet passage is required, and the squeezed excess mercury can easily be completely removed, so that the cylindrical surfaces are constantly kept clean.

Uppfinningen skall narmare beskrivas med hanvisning till bifogade ritning, som visar en utfbringsform av en amalgampress enligt uppfinningen. Pressen, som ãr utfOrd i form av en skruvpress, hestar av en ringformig sta- tivram 1, forsedd med ett dari infastat hand- tag 2, en likaledes i stativramen fast anbragt tapp 3, som Sr anordnad i ett mot handtaget 2 vinkelratt lage, och som bildar botten i en langs tappen rorlig presscylinder 4 samt en koaxialt i forhallande till bottentappen 3 anordnad gcnom ett hal i stativramen 1 ingang- ad skruy 5, som Sr forsedd med ett handtag 6, och som vid sin yttre ande Sr utbildad till en kolv 7 av samma diameter som bottentap- pen 3. Cylindern 4 kan ha en inre diameter av 10 mm. Mellan cylinderns inre yta samt bottentappen 3 och kolven 7 Sr anordnat ett ringa spelrum, som är avpassat med han- syn till kvicksilverkristallernas storlek, sa att praktiskt taget endast rent kvicksilver kan utpressas genom namnda spelrum. For detta andamal bor spelrummet lampligen vara mindre an 0,ors mm. Skruvens 5 stigning kan exempelvis vara 2 mm. The invention will be described in more detail with reference to the accompanying drawing, which shows an embodiment of an amalgam press according to the invention. The press, which is made in the form of a screw press, horses of an annular frame frame 1, provided with a handle 2 fixed therein, a pin 3 likewise fixed in the frame frame, which Sr is arranged in a bearing perpendicular to the handle 2, and which forms the bottom of a press cylinder 4 movable along the pin and a coaxial in relation to the bottom pin 3 arranged through a hall in the frame frame 1 entered by a screw 5, which Sr is provided with a handle 6, and which at its outer spirit Sr is formed into a piston 7 of the same diameter as the bottom pin 3. The cylinder 4 can have an inner diameter of 10 mm. Arranged between the inner surface of the cylinder and the bottom pin 3 and the piston 7 is a small clearance, which is adapted with regard to the size of the mercury crystals, so that practically only pure mercury can be extruded through said clearance. For this purpose, the clearance should suitably be less than 0, ors etc. The pitch of the screw 5 can, for example, be 2 mm.

Vid anvandning av pressen forskjutes fOrst cylindern 4 till sitt ned.ersta lage pa bottentappen 3 och skruven 5 installes sa, att andplanen pa tappen 3 och kolven 7 komma .ett avstand fran varandra, som gOr det mojligt att mellan desamma inf5ra den kvantitet amalgam, som for tillfallet skall behandlas i pressen. Namnda avstand Sr vanligen cirka 5-6 mm. For att mojliggiira inforandet av amalgammassan bor bottentappen vara sa Fang och Oppningen i ramen sa stor, att an-den av tappen kan het frilaggas genom f Or- skjutning av cylindern 4 ph tappen 3. Sedan amalgamet anbringats ph andytan av bottentappen 3, forskjutes cylindern 4 upp Over kol- 2— — ven 7, sã att dess mitt konnner att ligga ungefar mitt emellan de bada andytorna pa tap-:pen 3 och kolven 7. Darefter fattar limn skruyen 5 i handtaget 6 ()eh vrider skruven sa. att -kolven 7 pressas mot amalgamet. Sedan. man _pa detta salt med lampligt tryck utpressat --den onskade mangden kvicksilver, som dar- avgar genom namnda spelrum runt kanterna pa cylindern 4, vrides skruven hastigt nagra vary tillbaka och cylindern. fi5rskjutes Ater till sitt nedersta lage, varefter amalgammassan, som nu genom tryeket antagit for-men av en hart sammanpressad rund skiva eller tablett, med :ett finger stoles loss fran underlaget. Den salund sammanpressade :amalgammassan Sr fardig for omedelbar anvandning. Hela arbetsforloppet for avlagsnande av kvicksilveroverskottet fran amalgamet kan pa delta satt ske sã hastigt, att den tid, som forflyter fran del ogonblick kvicksilvret utpressas, till dess amalgamtabletten Sr fardig att anvandas, blir mindre an fern sekunder. Det Sr givetvis av star betydelse, att detta tidsintervall blir sa litet som mojligt, fOr att kondenseringen av amalgamet skall kunna hinna slutforas, innan den paborjade kristaIliseringen hindrar en fortsatt bearbetning. When using the press, the cylinder 4 is first displaced to its lowest layer on the bottom pin 3 and the screw 5 is installed so that the duck plane on the pin 3 and the piston 7 are at a distance from each other, which makes it possible to introduce the quantity of amalgam between them. which for the occasion is to be treated in the press. Said distance Sr usually about 5-6 mm. In order to allow the insertion of the amalgam mass, the bottom pin should be so large and the opening in the frame that the second of the pin can be hot exposed by displacing the cylinder 4 ph the pin 3. After the amalgam has been applied to the surface of the bottom pin 3, the cylinder is displaced 4 up Over the piston 2— - vein 7, so that its center can lie approximately midway between the two surfaces of the tap 3 and the piston 7. Then glue the screw 5 in the handle 6 () eh and turn the screw so. that the piston 7 is pressed against the amalgam. Since. When the salt is pressed out with suitable pressure, the desired amount of mercury, which passes through the said clearance around the edges of the cylinder 4, the screw is quickly turned back and the cylinder. Ater is pushed to its lowest layer, after which the amalgam mass, which has now by the pressure assumed the shape of a hard compressed round disc or tablet, with: a finger is loosened from the substrate. The salund compressed: the amalgam mass Sr ready for immediate use. The whole process of removing the excess mercury from the amalgam can sometimes be so rapid that the time which elapses from the moment the mercury is squeezed out until the amalgam tablet is ready to be used is less than four seconds. It is of course of great importance that this time interval be as small as possible, so that the condensation of the amalgam can have time to be completed, before the started crystallization prevents further processing.

De fordelaktiga .egenskaperna hos en amaIgampress enligt uppfinningen aro huvudsakligen att hanfora till den speciella anordningen och dimensioneringen av de avloppspassager, genom vilka Overskottskvieksilvret pressas. Darigenom att kvicksilvret utpressas genom namnda spelrum, som bildar en ringformig, axiellt riktad passage, forhindras, att kvicksilvret kan sugas tillbaka in i amalgamet, nar tryeket upphOr. Som foljd harav kan man alltid rakna med att det fardiga amalgamet kommer att innehalla den Onskade kvicksilverhalten. Genom att redueera spelrummet till en tolerans av den. ovannamnda .storleksordningen tillforsakras, att praktiskt taget endast rent kvicksilver utpressas ur amalgainmassan. Delta OverskottskvicksiIver kan salunda anvandas for framstallning av nytt amalgam. DS pa sa satt inget vare sig .amalgampulver eller kvicksilver gar forlorat, ernas en avsevard besparing av material. I detta avseende innebar uppfinningen en vasentlig fordel gentemot forut kanda amalgampressar, dar del utpressade materialet icke be-star av rent kvicksilver titan av tunnflytande amalgam, som sedan i allmanhet icke kan anvandas utan maste kasseras. The advantageous properties of an amalgam press according to the invention are mainly due to the special device and the dimensioning of the drain passages through which the excess mercury is pressed. By squeezing the mercury through said clearance, which forms an annular, axially directed passage, the mercury can be sucked back into the amalgam when the pressure ceases. As a result, one can always assume that the finished amalgam will contain the desired mercury content. By reducing the clearance to a tolerance of it. The above-mentioned order of magnitude ensures that practically only pure mercury is extruded from the amalgam mass. Delta Excess mercury can thus be used for the production of new amalgam. DS in this way, neither amalgam powder nor mercury is lost, there is a considerable saving of material. In this respect, the invention entailed a significant advantage over prior art amalgam presses, in that the extruded material does not consist of pure mercury titanium of thin liquid amalgam, which then generally cannot be used but must be discarded.

Den omstandigheten, att del utpressade kvicksilvret Sr rent, liar Sven den fOrdelen, att tillstoppningen av avloppspassagerna undvikes. Vidare forhindras, att cylindern samt kolven och bottentappen kunna karva ihon. Pet Sr darfor myeket Hitt att bppna pressen genom tillbakadragande av cylindern, vilken darvid lampligen samtidigt %rides. The fact that some extruded the mercury is pure gives Sven the advantage that the clogging of the drain passages is avoided. Furthermore, it is prevented that the cylinder as well as the piston and the bottom pin can carve into it. Pet Sr darfor myeket Hitt to open the press by retracting the cylinder, which thereby probably at the same time% rides.

En annan fordel hos den ifragavarande amalgampressen bestar dari, att kvicksilvret under inverkan av kolvens 7 vridningsrorelse utsattes for en vridande eller knadande inverlian, varigenom amalgampartiklarna fOrskjutas inbordes samt avskiljande av kvieksilvret underlattas. Another advantage of the amalgam press in question is that under the influence of the rotational movement of the piston 7 the mercury is subjected to a rotating or kneading inverlian, whereby the amalgam particles are displaced inboard and separation of the mercury is facilitated.

Tack vane anvandningen av en skruv for sammanpressning av amalgammassan kan ett betydligt storre tryck uppnas an vid ford Hilda amalgampressar. Om sa erfordras kan trycket stegras till flora ton. Harigenom kan man framstalla ett i hog grad kvicksilverfattigt amalgam, vilket kan vara av betydelse I siidana fall, dit man 8nskar, att amalgamet skall kunna uppsuga overskottskvieksilyret fran forut insererat amalgam. Thanks to the habit of using a screw for compressing the amalgam mass, a much greater pressure can be achieved with Ford Hilda amalgam presses. If required, the pressure can be increased to flora tone. In this way it is possible to produce a highly mercury-poor amalgam, which may be important in such cases, where it is desired that the amalgam should be able to absorb the excess mercury from previously inserted amalgam.

Claims

Patent claim:

Amalgam press, specially for dental use, consisting of a press cylinder and a press piston fitting with a small clearance in the cylinder, characterized in that the bottom of the cylinder consists of a cylindrical pin coaxially arranged in relation to the cylinder so that the cylinder and the bottom pin are axially displaceable in relation to each other.

2. An amalgam press according to claim 1, characterized in that the bottom pin is fixed and the cylinder is displaceable on the pin.

Amalgam press according to claim 1 or 2, characterized in that the press piston and the bottom pin Sr. arranged in a common, on two opposite sides open, suitably annular frame frame.

4. An amalgam press according to claim 3, characterized in that the press piston forms the outer spirit of a screw threaded in Tamen.

5. An amalgam press according to claim 3, characterized in that the bottom pin Sr sO fixed in the frame. long and the frame opening so large that the spirit of the pin can be completely exposed by displacing the cylinder on the pin.

6. Amalgam press according to any one of the preceding patent claims, characterized in that the cylinder is rotatable about the bottom pin.

7. An amalgam press according to any one of the preceding patent claims, characterized in that a small clearance of the same order of magnitude as the clearance between the press piston and the cylinder Sr arranged Sven between the bottom pin and the cylinder.

8. An amalgam press according to claim 1 or 7, characterized in that the clearance space Sr is of such an order of magnitude that only substantially pure mercury can be extruded therethrough. Stockholm 1548. Kungl. Boktr. P. A. Norstedt & Silner 480089