SINGLE-USE COFFEE FILTERS

• US 3,823,656 A
• Filed: 09/18/1972
• Issued: 07/16/1974
• Est. Priority Date: 04/26/1972
• Status: Expired due to Term

• Current Assignee: Germaine Vander Veken
• Original Assignee: Germaine Vander Veken
• Inventors: Vander Veken, Germaine
• Primary Examiner(s): Jenkins, Robert W.
• Application Number:
  US05/289,933
• Time in Patent Office: 666 Days
• Field of Search: 99/295,306,304 426/433,434,82,72
• US Class Current: 99/295
• CPC Class Codes: A47J 31/02 Coffee-making machines with removable extraction cups, to be placed on top of drinking-vessels i.e. coffee-makers with removable brewing vessels, to be placed on top of beverage containers, into which hot water is poured, e.g. cafe filter filters A47J31/06
• CPC Class Codes: A47J 31/0642 specially adapted to cooperate with a cartridge, e.g. having grooves or protrusions to separate cartridge from the bottom of the brewing chamber A47J31/0668 takes precedence
• CPC Class Codes: B65D 85/8043 Packages adapted to allow liquid to pass through the contents B65D85/808 takes precedence; filters or reusable cartridges for coffee or tea makers, not used as packages A47J31/06

Abstract

A single-use throw-away coffee filter comprising a water receiving filtering body having a bottom which is substantially constituted by a cartridge or capsule containing coffee and a filter element, the improvement comprising means to provide a sealing fit and to prevent relative movement between the filtering body and capsule, especially during the brewing of coffee.

Claims

1. A single-use filter device comprising, in combination, a vessel adapted to contain a quantity of water and a capsule with a does of ground coffee or similar material, said capsule having upper and lower walls made of filtering material, said vessel having an inner wall with an inner ridge and another profiled portion and said capsule having an outer abutment adapted to cooperate with said inner ridge so as to be supported thereby and said capsule having moreover a lip adapted to cooperate with said other profiled portion so as to ensure a good sealing between the vessel and the capsule.

2. said sidewall also having a generally axially extending second portion;

3. A single-use filter device according to claim 1, wherein said other profiled portion is inwardly tapered.

4. said capsule also having a deformable seal element on another peripheral area of said capsule, the outer diametrical size of said seal element at rest being greater than the inner diametrical size of said axially extending sidewall portion, whereby said capsule is retained in said opening with the abutment thereof cooperating with the said ridge of said opening to positively prevent axial motion of said capsule beyond a desired point in said openIng, and with said seal element engaging said axially extending sidewall portion in a liquid sealing and wedging relationship.

5. A single-use filter device according to claim 1, wherein said other profiled portion forms part of a peripheral edge delimiting a bottom opening in said vessel.

6. A single-use filter device according to claim 1, wherein said lip is directed downwardly.

7. A single-use filter device according to claim 1, wherein said lip is directed upwardly.

8. A single-use filter device according to claim 1, wherein said abutment is constituted by a concave part downwardly prolonged by said lip, whilst said inner ridge and said other profiled part have a shape which is complementary to that of said concave part and said lip.

9. A single-use filter device according to claim 1, wherein said abutment is constituted by a convex part downwardly prolonged by said lip, whilst said inner ridge and said other profiled part have a shape which is complementary to that of said convex part and said lip.

10. A single-use filter device according to claim 1, wherein said lip is connected to the body of said capsule by a circular rim.

11. A single-use filter device according to claim 1, wherein said lip is made of a plurality of parts.

12. A single-use filter device according to claim 1, wherein said lip is formed by a plurality of circular ribs.

13. In a single-use coffee filter unit including a water vessel having an opening in its bottom, including a sidewall of said opening, said opening receiving a coffee containing capsule in interfitting and sealing relationship with said sidewall, the improvement comprising: