US Patent 7506655 Dishwasher

A dishwasher with a double-walled door pivotal between open and closed states and provided between its walls with a salt receiving container provided with a vent opening part of its upper wall extending between the walls of the door. The vent opening is connected with a vent channel at least part of which is narrowed by a ridge extending partly across the channel and which extends over the salt receiving container and along a lateral wall thereof to a lower section for providing access to ambient air.