Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
  • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
  • B05C17/00553—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with means allowing the stock of material to consist of at least two different components
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C5/00—Filling or capping teeth
  • A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
  • A61C5/62—Applicators, e.g. syringes or guns
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C5/00—Filling or capping teeth
  • A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
  • A61C5/62—Applicators, e.g. syringes or guns
  • A61C5/64—Applicators, e.g. syringes or guns for multi-component compositions
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C5/00—Filling or capping teeth
  • A61C5/60—Devices specially adapted for pressing or mixing capping or filling materials, e.g. amalgam presses
  • A61C5/68—Mixing dental material components for immediate application to a site to be restored, e.g. a tooth cavity
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
  • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
  • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
  • B05C17/0146—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like comprising a valve in the proximity of the nozzle that is not actuated by pressure, e.g. manually actuated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
  • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
  • B65D81/3255—Containers provided with a piston or a movable bottom, and permitting admixture within the container

Definitions

• the invention concerns a mixing and application or dispensing capsule for dental mate ⁇ als.
• a tubular piston is supported against the container with a tear-off ⁇ ng.
• the tear-off ⁇ ng is removed with a g ⁇ pper tool.
• a container has in one end lying opposite a throughput borehole a correspondingly configured projection, which engages in a correspondingly configured recess of the tubular piston in the resting state, and secondly by the fact the container has, above the throughput borehole, a guide groove, in which a slider joined with a discharge cannula is guided m a sliding motion and can be stopped both in the sealing and conducting positions.
• the tubular piston can be displaced without friction up to a limited feed or advance.
• the blocking function which is produced by the interaction between the projection of the inside wall of the container and the recess of the outer wall of the tubular piston is joined at a limited extent of advance of the stamp, which is sufficient for emptying the tubular piston, while it terminates after this.
• the friction-free advance after mixing can only be guaranteed if the projection lies on the inner wall of the container and the recess lies on the outer wall of the tubular piston
• the radial projection of the container which is shaped as a convexly arched inner surface, engages in the radial recess of the tubular piston, which is shaped as a concavely arched outer surface.
• the stamp is shaped like a cylinder with a uniform outer diameter, which is adapted to the diameter of the tubular piston The diameter is reduced only m the short region of the stamping plate.
• the guide of the stamp in the piston is stable such that even with an oblique placement of the piston for activating the mixing and dispensing capsule, no radial gap is formed between the inner wall of the tubular piston and the outer wall of the stamp, and thus a leaking out of liquid is reliably avoided.
• An erroneous pressing of the stamp is avoided in that the friction between the stamp and the tubular piston is selected sufficiently high.
• This can be accomplished, on the one hand, by an approp ⁇ ate adaptation and mate ⁇ al selection for the stamp and the tubular piston and or, on the other hand, by an approp ⁇ ate catch or snap connection as desc ⁇ bed above between the stamp and the tubular piston.
• this can be accomplished by an elastic O- ⁇ ng which may be located in a recess in the stamp wall. Another advantage of the elastic O- ⁇ ng is the increased sealing between the inner wall of the tubular piston and the outer wall of the stamp.
• the liquid container which is formed by the tubular piston, the stamp as the bottom and the foil as the cover, can be mounted and filled in a simple way. Since the mixing and dispensing capsule will hold different dental mate ⁇ als, it is understood that the mside space of the tubular piston that is not taken up by the stamp, as well as the mside space of the container not taken up by the tubular piston, will have sufficient remaining space m order to take up the quantities of the mixing components that occur, whereby the residual volume in the container must be designed for liquid components and for the mixing process, in addition to holding the powder components.
• the container has, above the throughput borehole, a guide groove that becomes wider toward the mside, in which a conical slider, which is joined with a discharge cannula without a transition, is held m a sliding manner.
• An accidental displacement of the slider will be avoided by the cooperation of an approp ⁇ ately configured bucklmg-out piece on the underside of the slider and two approp ⁇ ately configured indentations in the guide groove of the container.
• the resulting friction between the slider and the guide groove is selected in such a way that the slider can be actuated by hand.
• the slider seals the mixing and dispensing capsule m an air-tight manner, by catching the bucklmg-out piece of the slider in the indentation of the guide groove lying closest to the discharge opening After mixing, the slider is displaced in the direction of the indentation lying further away to the throughput borehole and after a specific amount of displacement catches with its bucklmg-out piece on the underside.
• the specific amount of displacement results from the distance of the two indentations in the guide groove
• the distance and the position of the two indentations in the guide groove are selected such that the mixing and dispensing capsule is closed in the sealing position in an airtight manner by the slider, and after mixing, the discharge opening is brought to the throughput borehole in the cover, so that the channel of the discharge cannula is maximally accessible.
• the slider has a length such that m the sealing position, one end of the slider projects over the edge of the mixing and dispensing capsule by an amount corresponding to the amount of displacement between the indentations of the guide groove.
• the state of the mixing and dispensing capsule can be clearly recognized and this excludes error in the operation.
• the slider can be stopped only in positions that are important for the function of the mixing and dispensing capsule.
• Fig. 1 shows a longitudinal section of the mixing and dispensing capsule of the invention in a first form of embodiment in the finished, mounted state, p ⁇ or to activation.
• Fig. 2 shows a representation corresponding to Fig. 1 of a first form of embodiment after activation.
• Fig. 3 shows a representation corresponding to Fig. 1 of a first form of embodiment after emptying.
• Fig. 4 shows a longitudinal section of the slider and the guide groove in a single representation.
• Fig. 5 shows a section along line A-A of Fig. 4.
• Fig. 6 shows an alternative embodiment of the capsule of Fig. 1.
• a mixing and dispensing capsule according to the invention has a cylmd ⁇ cal container 10, a liquid container 20 shaped as a tubular piston, a stamp 40, and a slider 32 joined with a discharge cannula 30.
• container 10 forms, within cylmd ⁇ cal walls 19, mixing chamber 8, which is bounded at the top by a front wall 9 with a throughput borehole 13 and on the bottom by foil 23 of tubular piston 20.
• the outer walls of container 10 have a guide groove 15 (Fig. 4) becoming wider toward the side, which takes up slider 32, which is joined with discharge cannula 30.
• guide groove 15 is shaped like a wedge. It is understood that the guide groove 15 can also be configured as broadening inwardly m stepped form.
• slider 32 is adapted in its shape to correspond to guide groove 15.
• Slider 32 has on the underside of the sealing end, a semi-sphe ⁇ cal bucklmg-out piece 34, which can catch in semi-sphe ⁇ cal indentations 12 and 14 sunk in bottom 16 of guide groove 15.
• the length of slider 32 is selected such that the actuation end 37 in the sealing position of slider 32 projects over edge 11 by an amount corresponding to the amount of displacement between indentations 12 and 14. It is preferred to establish the friction between slider 32 and guide groove 15 by an approp ⁇ ate adaptation, so that slider 32 can be actuated by hand by actuation end 37; in the sealing position mixing chamber 8 is sealed in a substantially airtight manner by sealing end 39, and in the conducting position, the flow of mixed dental mate ⁇ al flows out only through discharge opening 38. Slider 32 is joined with discharge cannula 30 above discharge opening 38. It is preferred that slider 32 and discharge cannula 30 are combined into one part.
• Channel 35 between discharge opening 32 and mouth opening 36 is constricted in a funnel form in the region of the inner wall of slider 32 and runs slightly conical in the region of the inner wall of discharge cannula 30.
• a particularly favorable flow profile results, which facilitates the discharge of highly viscous dental mate ⁇ als, such as, for example, glass lonomer filling cements.
• discharge cannula 30 is bent in such a way that a favorable working range of 30-50° relative to the longitudinal axis of the mixing and dispensing capsule results thereby.
• Mixing chamber 8 holds the powdery components of the dental mate ⁇ al m the prepared state according to Fig. 1.
• the hollow space that is formed by mixing chamber 8, is thus dimensioned such that even when the maximal filling volume is provided, there always remains enough hollow space unfilled, so that a good intermixing is later possible.
• the cyhnd ⁇ cal inner wall 19 of container 10 forms a well-sealing guide for tubular piston 20, which serves on the one hand as a liquid container and on the other hand as an uptake for stamp 40.
• container 10 has an outer projection m the form of an annular groove 17, which produces the connection with a discharge g ⁇ pper tool (not shown) acting on stamping surface 43.
• Inner wall 19 of container 10 ends m a radial, convexly arched inner projection 18, which has a smaller diameter than the mside wall 19 of the container. Projection 18 is limited at the bottom by the radial foot surface 7.
• Tubular piston 20 is positioned inside container 10.
• the mside space of tubular piston 20 is bounded by the cylindrical inner wall of the latter, by the inner surface 24, by foil 23, and by the front surface of stamp 41.
• This inside space holds the liquid components of the dental mate ⁇ al.
• Mixing opening 25 has a smaller diameter than the diameter of the inner wall of the tubular piston.
• Foil 23, which serves for sealing the mixing opening 25 in the state of rest of the mixing and dispensing capsule, is glued or is bonded onto the back side of inside surface 24, whereby the diameter of the circular foil 23 is larger than the diameter of mixing opening 25 and smaller than the diameter of the inner wall of container 10.
• tubular piston 20 ends in a radial, concavely arched recess 26, which has a smaller diameter than the outer wall of tubular piston 20.
• Recess 26 is bounded at the bottom by radial foot surface 27 and is substantially flush with foot surface 7. It is assured in this way that tubular piston 20 is taken up completely in container 10 and when activated by hand, there is no displacement of tubular piston 20 relative to container 10, if stamp 40 is completely pushed into tubular piston 20.
• the catch or snap connection results by the catching of projection 18 of container 10 in recess 26 of tubular piston 20.
• Projection 18 is configured to recess 26 such that, tubular piston 20 is held sufficiently rigidly in the desired position of rest during storage and transport to the user as well as according to Fig. 2 during the activation process, and, on the other hand, according to Fig. 3, the friction, which arises between tubular piston 20 and container 10 with a further advance of stamp 40, is not too great, so that the discharge of the mixed dental material is reliably assured with a known discharge gripping tool.
• Stamp 40 which has a front surface 41 with a projection 42 is found mside tubular piston 20.
• the friction between the inner wall of tubular piston 20 and the outer wall of stamp 40 is selected in such a way that stamp 40, not without exercising hand force, changes its relative position to tubular piston 20, which is adjusted m the tension of the assembly It is understood that the friction can also be provided by a catch or snap connection, which exists between a radial, convexly arched projection of the inner wall of tubular piston 20 and a radial, concavely arched recess of the outer wall of stamp 40.
• Another provision for friction and improved sealing is the use of an elas ⁇ c O- ⁇ ng 45 (Fig. 6) which is located in a preferably concavely arched recess 46 of the outer wall of stamp 40.
• the length of stamp 40 is preferably adapted to the length of tubular piston 20, so that stamp 40 can be completely taken up in tubular piston 20.
• front surface 41 with projection 42 is adapted to inner surface 24 with mixing opening 25, as can be seen from Fig. 2, so that projection 42 fills up mixing opening 25 when stamp 40 is completely pressed m. In this way, the liquid component is completely expelled from the tubular piston.
• stamp 40 is provided with a borehole 44 (Fig. 1).
• Fig. 1 the mixing and dispensing capsule is shown in the state of rest.
• stamp 40 is pressed by hand against a ⁇ gid base, e.g., a working surface.
• stamp 40 is displaced in tubular piston 20 and exercises a pressure on liquid component 50 and expels the residual air that is present, which m turn presses on foil 23.
• foil 23 bursts and the liquid component 50 is injected into mixing chamber 8.
• the end of the activation process is clearly indicated, as is better seen from Fig. 2, if stamp foot surface 43 ends flush with foot surfaces 7. It is understood that projection 42 is also flush with the upper end of mixing opening 25, and liquid component 50 is completely injected into the mixing chamber. Du ⁇ ng the activation process, no relative motion occurs between tubular piston 20 and container 10.
• the mixing and dispensing capsule is utilized in a known vibrating mixing device, m order to produce a homogeneous mixing of components 50 and 60 of dental mate ⁇ al introduced together into mixing chamber 8.
• the capsule is removed and mixing chamber 8 is opened by displacing slider 32 into the conducting position.
• slider 32 is moved such as by finger pressure, onto the actuating end 37 in the direction of the arrow
• bucklmg-out piece 34 at the underside of slider 32 is popped out of indentation 14.
• bucklmg-out piece 34 In the conducting position of the slider, bucklmg-out piece 34 catches notably in indentation 12, discharge opening 38 is covered by the throughput borehole, and the actuation end 37 as well as sealing end 39 are flush with the edge of the cylind ⁇ cal outer wall of container 10.
• the mixing and dispensing capsule can be emptied. This is done by inserting the mixing and dispensing capsule into a known discharge g ⁇ pper tool. The finished mixture is pressed out through discharge cannula 30 by advance of stamp 40, whereby the empty state is shown in Fig. 3. Tubular piston 20 is then completely pushed into mixing chamber 8 with the pushed-m stamp 40.

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• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)

Applications Claiming Priority (3)

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• 1999
  • 1999-10-14 WO PCT/US1999/023832 patent/WO2000023002A1/en not_active Application Discontinuation
  • 1999-10-14 EP EP99953152A patent/EP1123061A1/de not_active Withdrawn
  • 1999-10-14 JP JP2000576780A patent/JP2003522555A/ja active Pending

Non-Patent Citations (1)

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