# US 2018/0021111 A1 · Mixing and dispensing container > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0021111 A1 - Document ID: US20180021111A1 - Status: Published application - Kind: A1 - Application number: 15/724,158 - Filed: 2017-10-03 - Published: 2018-01-25 - Earliest claimed: 2012-08-01 - Assignees: SDI North America Inc. - Inventors: Joshua James CHEETHAM - Web page: https://patentgrep.com/patent/US20180021111A1 ## CPC - A61C 9/0026: {Syringes or guns for injecting impression material; Mixing impression material for immediate use} - A61C 5/64: for multi-component compositions - B05C 17/00553: {with means allowing the stock of material to consist of at least two different components} - B05C 17/0106: {with means for longitudinally cutting container walls during relative displacement of the piston and its cooperating container} - B65D 25/08: with provisions for removing or destroying, e.g. to facilitate mixing of contents - B65D 47/10: having frangible closures - B65D 47/103: {Membranes with a tearing element} - B65D 47/106: {with devices for removing frangible parts of the pouring element or of its closure} - B65D 81/3222: {with additional means facilitating admixture} - B65D 83/687: with contents and the propellant being fully mixed on, or prior to, first use, e.g. by breaking an ampoule containing one of those components - B65D 83/76: for dispensing fluent contents by means of a piston - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08) - 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 ## Abstract A container 10 for mixing and dispensing of material having a liquid receptacle 14 and a plunger 18. The receptacle 14 has a front portion 36 and the plunger 18 has a forwardly projecting sharp protrusion 42 having a shaft 72 which terminates in a sharp outer end 78, 82. Upon the plunger 18 being depressed the sharp protrusion 42 pierces a front portion 36 of the liquid receptacle 14 and the liquid in the receptacle 14 is pushed hydraulically through the front portion 36 into the main chamber 17. Thus the liquid contacts material in the main chamber 17 to form a mixture. The plunger 18 can continue to be depressed so as to break the front portion 36 of the liquid receptacle 14 away and then push the material in the main chamber 17 towards a dispensing nozzle 26. The main chamber 17 has a frangible membrane 22 at a distal end 13 thereof which is hydraulically broken by pressure applied from the material in the main chamber 17 so that the material can be dispensed from the container 10. The container 10 is particularly envisaged for use with mixing and dispensing of dental materials. ## Claims ### Claim 1 A container for the mixing and dispensing of dental material, said container comprising a body with a main chamber having a length, a dispensing nozzle, a liquid receptacle and a plunger, said liquid receptacle having an inner front portion and said plunger being moulded and having a shaft forwardly projecting from said plunger terminating in a sharp outer end, said shaft having a portion adjacent to said plunger which is of substantially uniform cross-section throughout and an outer end portion which slopes inwardly towards an outer end of said shaft such that said shaft terminates in a sharp outer end, said inner front portion of said liquid receptacle having a central weakened portion which is substantially wider than said shaft of said plunger, said plunger being arranged for linear depression such that said sharp outer end pierces said inner front portion of said liquid receptacle at said central weakened portion wherein continued linear depression of said plunger causes liquid in said liquid receptacle to be pushed hydraulically from said liquid receptacle through said inner front portion around said shaft into said main chamber of said body for contacting material in said main chamber for forming a mixture, said inner front portion of said liquid receptacle being circumferentially weakened to be entirely detached from the reminder of said liquid receptacle by continued linear depression of said plunger such that said plunger traverses said length of said main chamber entirely together with said detached inner front portion for facilitating dispensation of said mixture from said main chamber into said dispensing nozzle, said remainder of said liquid receptacle remaining stationary throughout. ### Claim 2 (depends on 1) A container according to claim 1, wherein said weakened portion of said inner front portion of said liquid receptacle is substantially thinner than the reminder of said inner front portion of said liquid receptacle, and in use, said shaft engages with and then pierces said inner front portion in said central weakened portion thereof so that said liquid in said liquid receptacle is pushed hydraulically through said pierced central weakened portion. ### Claim 3 (depends on 2) A container according to claim 2, wherein said detached front portion of said liquid receptacle functions as a seal as it traverses the entire length of said main chamber. ### Claim 4 (depends on 2) A container according to claim 2, wherein said main chamber of said body is sealed at a distal end remote from said liquid receptacle by a separate frangible membrane. ### Claim 5 (depends on 3) A container according to claim 3, wherein said main chamber of said body is sealed at a distal end remote from said liquid receptacle by a separate frangible membrane. ### Claim 6 (depends on 4) A container according to claim 4, wherein said separate frangible membrane at the distal end of said main chamber is arranged to be broken by hydraulic pressure applied by said detached front portion of said liquid receptacle by said mixed material contained in said main chamber after mixing. ### Claim 7 (depends on 2) A container according to claim 2, wherein said central weakened portion has a thickness of less than 0.01 mm. ### Claim 8 (depends on 2) A container according to claim 2, wherein said central weakened portion is formed of a unitary sheet of material. ### Claim 9 (depends on 7) A container according to claim 7, wherein said central weakened portion is formed of a unitary sheet of material. ### Claim 10 (depends on 4) A container according to claim 4, wherein said separate frangible membrane has a thickness of less than 0.01 mm. ### Claim 11 (depends on 4) A container according to claim 4, wherein said separate frangible membrane is formed of a unitary sheet of material. ### Claim 12 (depends on 10) A container according to claim 10, wherein said separate frangible membrane is formed of a unitary sheet of material.