Abstract: A disposable refill cartridge for a liquid soap dispenser having a closed container with a bottom wall portion and a rear wall portion and two opposes side wall portions. An outlet opening is formed in a cylindrical neck extending from the bottom wall portion, as is a frustoconical portion intermediate the bottom wall and the cylindrical neck. At least one boss extends outwardly from the frustoconical portion and the cylindrical neck with two elongated recesses respectively formed in the side wall portions adjacent to the rear wall portion. Each of the recesses extends downwardly to the bottom wall portion, and the container has stepped retaining surfaces at the upper end of the rear wall portion and at the lower ends of the side wall portions. A receptacle is formed in the rear wall having an apertured end wall.

Abstract: A liquid soap dispensing system includes a housing and a discharge mechanism for dispensing repeated doses of liquid soap from an associated cartridge. A receptacle is positioned in the cartridge wall forming an air path between the inside and outside of the cartridge, and a plastic filter is frictionally disposed within the receptacle for permitting air to flow into the cartridge but preventing soap from flowing out of the cartridge. The filter permits sufficient air flow into the cartridge to limit the vacuum therein to not greater than about 12" upon repeated operation of the discharge mechanism to prevent the cartridge walls from distorting.