Extraction device and sealing system

An extraction apparatus, with a brewing module for receiving a capsule with a capsule wall and with an extraction material in a capsule interior, wherein the brewing module comprises a first brewing module part and a second brewing module part, said second brewing module part being movable relative to the first brewing module part, wherein the first and the second brewing module parts form a discharge device for the discharge of an extraction product out of the capsule, and an introduction device for introducing an extraction fluid into the capsule, wherein the introduction device comprises at least one piercing tip for piercing the capsule, wherein the introduction device is provided with an elastically deformable, injection-side seal that surrounds the at least one piercing tip of the introduction device and that comprises a seal collar encompassing the capsule in a positioning and holding manner and at least one circumferential sealing lip and/or circumferential sealing bead, wherein the at least one sealing lip or the at least one sealing bead bears on a surface of the capsule in a line-like or strip-like manner and presses the capsule wall against the capsule interior.