Patent ID: 9676547
Date: 2017-06-13
CPC Classifications: B29C,B29K,B29L,B65D

Claim:
1. A capsule which under pressure in espresso machines is suitable for extraction of coffee, the capsule comprising: a truncated cone-shaped capsule body of thermoformed plastic having; wherein the capsule body further comprises a circumferential centering ramp at the narrower end of the conical side wall, which translates into an inwardly directed circumferential second flange forming the circular inlet opening, the circumferential centering ramp designed to align the inlet sealing membrane with the inlet opening before welding it to the second flange; and wherein the inlet sealing membrane has a diameter larger than the outer diameter of the second flange, such that the circular edge of the inlet sealing membrane is able to bend upwards along the centering ramp and at least partially covers the centering ramp when welding it to the second flange, wherein the upwards bend circular edge forms a heat protecting layer between a hot sealing tool and the centering ramp during welding the inlet membrane to the second flange.