Mixing and discharge capsule

• US RE33,801 E
• Filed: 08/15/1988
• Issued: 01/21/1992
• Est. Priority Date: 05/09/1986
• Status: Expired due to Term

• Current Assignee: Dentsply Research & Development Corporation (Astrazeneca PLC)
• Original Assignee: Dentsply Research & Development Corporation (Astrazeneca PLC)
• Inventors: Green, Russell D.
• Primary Examiner(s): Shaver, Kevin P.
• Application Number:
  US07/233,866
• Time in Patent Office: 1,254 Days
• Field of Search: 222/80-83, 222/129, 222/136, 222/145, 222/327, 222/386, 206/219, 206/222, 206/63.5, 215/DIG. 8, 604/56, 604/82, 604/87-90, 604/92, 604/191, 604/200, 604/201, 604/223, 604/414, 604/416
• US Class Current: 222/82
• CPC Class Codes: A61C 5/64 for multi-component compositions
• CPC Class Codes: A61C 5/66 Capsules for filling material

Abstract

A combination mixing and discharge capsule for storing separate ingredients which are to be mixed together prior to use and including a container body for one ingredient closed at one end by a slidable piston and the opposite end being displaceably received in a cup-shaped cap which forms a second compartment with a perforated wall of the container body opposite the end containing the piston for receiving a frangible pillow containing a liquid second ingredient to be mixed with the ingredient in the body. The cap has a discharge nozzle extending axially therefrom and when the cap is displaced farther onto the body the innermost wall of the pillow is burst to cause the discharge of the liquid ingredient through the perforated wall end into the container body for mixing with the ingredient therein. After mixing is completed, a puncturing rod is inserted into the nozzle to puncture the opposite wall of the pillow and, when the rod is withdrawn the piston is moved toward the perforated wall to effect discharge of the mixed ingredients through the nozzle.

Claims

1. A combination mixing and discharge capsule comprising in combination, a body adapted to contain a first ingredient and having a piston in one end and the opposite end having a perforated wall on the body, a cap displaceably connected over the end of the body having the perforated wall and forming therewith a separate compartment, said cap having a discharge orifice in the form of a nozzle extending outwardly away from the opposite end of said body, a frangible container enclosing a second ingredient and disposed in said separate compartment with a wall oriented toward said perforated wall, means operable to displace said cap towards said piston and farther onto said body until at least the wall of the container oriented toward said perforated wall is ruptured to permit discharge of the container contents through said perforation into said container body for mixing with the ingredient therein, means operable to puncture the opposite wall of said container comprising a piercing rod .[.initially only partially inserted into said nozzle.]. with the inner end out of contact with said container and the inner end of said rod being extendable through said perforation in said opposite wall to effect perforation of said container, and means to move said piston into said body to engage the mixed ingredients and force the same through said discharge nozzle on said cap.

2. The capsule according to claim 1 on which said means to displace said cap farther onto said body comprises complementary threads on said cap and body.

3. The capsule according to claim 1, in which said piston in said one of said container body also forms a closure therefor to prevent loss of the ingredient in the body of the capsule from said one end.

4. The capsule according to claim 1 further characterized by said frangible container comprising a pillow having a pair of opposite rupturable walls and the edges of said walls being sealed together to enclose said second ingredient therein, said second ingredient being liquid.

5. The capsule according to claim 4 in which one wall of said pillow is oriented toward said perforated wall of the body and disposed thereagainst, said one wall of the pillow being weaker and therefore more readily subject to rupture than the opposite wall thereof.

6. The capsule according to claim 4 in which one wall of the pillow is oriented toward said perforated wall and disposed thereagainst, said one wall of the pillow being thinner than the opposite wall of said pillow to tender it more readily subject to rupture.