Chemical reservoir cap with compressible discharge port

A closure cap for sealing off an outlet opening of a liquid reservoir, the closure cap comprising:

• a top wall having an access opening extending through the top wall;
• a sidewall connected to and extending downwardly from the top wall to bound a space configured to receive an outlet opening of a liquid reservoir;
• and
• a sealing disc positioned under the top wall and across the access opening, the sealing disc comprising at least one vent opening extending through the sealing disc, the at least one vent opening being positioned under the top wall and offset from the access opening,
• wherein the sealing disc is fixedly positioned relative to the top wall, and the sealing disc comprises a compressible material configured to compress in response to a discharge device being inserted into the access opening and pressing against the compressible material, thereby opening a venting pathway from the access opening through the at least one vent opening.

A method of accessing a liquid reservoir, the method comprising:

• inserting a discharge device into an access opening of a closure sealing an outlet opening of a reservoir containing liquid chemical, the closure comprising a sealing disc fixedly positioned across the access opening, the sealing disc comprising a compressible material;
• piercing the sealing disc with the discharge device to open fluid communication with the reservoir through the access opening via the discharge device;
• and
• pressing the discharge device against the compressible material thereby compressing the compressible material away from a sealing surface and opening a venting pathway from the access opening through at least one vent opening extending through the sealing disc.