Improvements introduced in express coffee machines without steam pressure (Machine-translation by Google Translate, not legally binding)

摘要

Improvements introduced in the expresso coffee machines without steam pressure characterized in arranging a water dosing container governed or controlled by a valve interposed between the hot water outlet of the boiler and the sprinkler of the removable coffee holder, with which total filling is allowed or partial providing this same container and its upper base with a unidirectional inlet valve which in turn communicates with a system of air pressure (Machine-translation by Google Translate, not legally binding)