Capsule for mixing and dispensing a dental material

Patent metadata

Field	Value
Publication number	US-10052652-B2
Application number	US-201515303662-A
Country	US
Kind code	B2
Filing date	Apr 6, 2015
Priority date	Apr 16, 2014
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

A capsule for mixing and dispensing a dental material which has a body forming a cavity. The cavity is closed by a liquid container. The body and the liquid container in combination form a mixing chamber containing a first component of the dental material. The liquid container has a cup-shaped cartridge formed by a cartridge front wall and a cartridge side wall and having a rear opening. A plug is movably joined within the cartridge through the rear opening for extruding a liquid second component of the dental material. The cartridge further has a channel extending through the cartridge side wall for releasing the second component into the mixing chamber. The body side wall inwardly has a recess being dimensioned for establishing a fluid communication between the channel and the cavity in an activated position, where the activated position corresponds to a second axial position of a two different axial positions of the of the cartridge and the body relative to each other. Further the first axial position corresponds to an inactivated position in which the channel is offset from the recess. A first cover film seals the joint between the cartridge and the plug, and the channel is openably sealed by a second cover film at least in the inactivated position. The capsule helps facilitating the preparation of a dental material.

First claim

The invention claimed is:

1. A capsule for mixing and dispensing a dental material, comprising:
a body having a front end and a rear end and extending along a longitudinal axis;
the body forming a body front wall and a body side wall which protrudes from the front wall in a dimension of the longitudinal axis;
the body front wall and the body side wall in combination form a cavity extending into the body from the rear end toward the body front wall;
the cavity merging in an outlet through the body front wall and being closed by a liquid container adjacent the rear end;
the body and the liquid container in combination forming a mixing chamber containing a first component of the dental material;
wherein the liquid container comprises:
a cup-shaped cartridge formed by a cartridge front wall and a cartridge side wall and having a rear opening;
a plug being movably joined within the cartridge through the rear opening for extruding a liquid second component of the dental material;
the cartridge further having a channel extending through the cartridge side wall for releasing the second component into the mixing chamber;
wherein the body side wall inwardly has a recess being dimensioned for establishing a fluid communication between the channel and the mixing chamber in an activated position;
wherein the activated position corresponds to a second axial position of a first and a second axial position of the of the cartridge and the body relative to each other in a dimension along the longitudinal axis;
wherein the first axial position corresponds to an inactivated position in which the channel is offset from the recess;
wherein a first cover film seals the joint between the cartridge and the plug; and
wherein the channel is openably sealed by a second cover film in the inactivated position, and wherein the channel is at least initially openably sealed by the second cover film in the activated position.

2. The capsule of claim 1 , wherein in the inactivated position the second cover film is mechanically supported by the body side wall.

3. The capsule of claim 1 , wherein the second cover film and the cartridge are sealingly connected in an area surrounding the channel.

4. The capsule of claim 3 , wherein the connection forms a pre-determined breaking point.

5. The capsule of claim 1 , wherein the first and second cover film are formed by portions of a single cover sheet.

6. The capsule of claim 5 , wherein the cover sheet extends circumferentially around the liquid container about the longitudinal axis and being circumferentially sealed with the cartridge as well as with the plug.

7. The capsule of claim 5 , wherein the cover sheet comprises at least one polymeric layer and a metal layer and being formed as a circumferential sleeve.

8. The capsule of claim 1 , wherein the first and second cover film are formed monolithically with the cartridge.

9. The capsule of claim 8 , wherein the first cover film extends circumferentially about the longitudinal axis and is circumferentially sealed with the plug.

10. The capsule of claim 1 , wherein at least a portion of the first cover film corresponds to a concertina hose.

11. The capsule of claim 1 , further having a nozzle for dispensing the dental material.

12. The capsule of claim 11 , wherein the nozzle is movable between a dispensing position and a storage position, wherein in the dispensing position the nozzle is in fluid communication with the outlet and in the storage position the nozzle closes the outlet.

13. The capsule of claim 1 , comprising a powder within the mixing chamber, wherein the powder and the liquid are adapted to form in combination a hardenable dental material.

14. The capsule of claim 1 , wherein the body comprises a catch for retaining the capsule in a dispensing gun.

15. The capsule of claim 1 , wherein the second cover film forms a pre-determined breaking point.

Assignees

• 3M Innovative Properties Co

Inventors

• Pauser Helmut
• Bertl Mathias

Classifications

• B05C17/00566 Primary

  with a dynamic mixer in the nozzle · CPC title

• B05C17/00503

  Details of the outlet element (B05C17/00523 takes precedence; nozzles for deformable tubular containers B65D35/38) · CPC title

• A61C5/62

  Applicators, e.g. syringes or guns · CPC title

• A61C5/68

  Mixing dental material components for immediate application to a site to be restored, e.g. a tooth cavity · CPC title

• A61C5/66

  Capsules for filling material · CPC title