Cartridge for beverage making

• US 5,108,768 A
• Filed: 11/25/1988
• Issued: 04/28/1992
• Est. Priority Date: 11/25/1988
• Status: Expired due to Fees

• Current Assignee: Peter K.L. So
• Original Assignee: Peter K.L. So
• Inventors: So, Peter K. L.
• Primary Examiner(s): Weinstein, Steven
• Application Number:
  US07/275,952
• Time in Patent Office: 1,250 Days
• Field of Search: 426/77, 426/78, 426/79, 426/84, 426/86, 426/112, 206/217, 206/519, 206/520, 99/295
• US Class Current: 426/77
• 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 cartridge of cup like shape having a substantially impervious frusta-conical wall provided with a first circumferential seal adjacent the open mouth of the cup and a second circumferential seal spaced toward the bottom of the cup. The bottom is perforated and is sealed by a strippable foil. The cartridge contains a preselected amount of material (say ground coffee) that fills the receptacle to a selected level. Preferably a plurality of such receptacles are packaged as telescoped stack of cartridges with a first receptacle telescoped within a second receptacle so that the second circumferential seal on the first cartridge is received in the first circumferential seal of the second receptacle thereby to seal the material in the second receptacle.

Claims

1. A mesting cartridge structure comprising a plurality of open ended receptacles telescopingly integrated one into another such that a first of said plurality of receptacles is telescoped within a second of said receptacles, each said receptacle having substantially impervious circumferential side wall means extending between a bottom wall at one axial end of said receptacle and an open end at the axial end of said receptacle remote from said one end, passages through said bottom wall, a first annular circumferentially extending seal forming seat in said circumferential side wall means adjacent said open end and a second annular circumferentially extending seal forming seat in said circumferential wall means spaced axially of said receptacle from said first circumferentially extending seal forming seat toward said bottom wall and a removable sealing element for sealing said passages through said bottom wall, a measured charge of material filling each said receptacle to a preset height above said bottom wall, said first circumferentially extending seal forming seat on said second receptacle receiving in sealing relationship therein said second circumferentially extending seal forming seat on said first receptacle thereby to seal said charge between said sealing element sealing said passages and a seal formed by engagement of said first and second circumferentially extending seal forming seats.

2. A nesting cartridge structure as defined in claim 1 wherein said first circumferentially extending seal forming seat having an inner concave sealing surface and said second circumferentially extending seal forming seat having an external convex sealing surface adapted to mate with said concave sealing surface.

3. A nesting cartridge structure as defined in claim 1 wherein said removable sealing element comprises an impervious sheet secured to an outer surface of said bottom wall and closing said passages.