Metered dispenser for viscous food product - has bulb forcing air through valve to move piston in tube

摘要

The feed distributes metered quantities of a viscous product from a rigid tube containing a free piston. The piston (17) divides the tube (1) into an open top compartment (18) containing the product (19) and a bottom one (20) between itself and a reinforced membrane (11) containing a valve (13), opened by pressure. The valve communicates with a manual air-compressor, such as an elastic bulb (14), whose interior forms a third compartment (21). Finger pressure (22) can be used to force air from the bulb through the valve and thus move the piston, to discharge part of the product.