Abstract: A squeeze dispenser for dispensing viscous liquid products such as pastes, jells and lotions. The dispenser includes a hollow housing, a pump mechanism in the form of a flexible hollow squeeze member attached along one side of the housing, and a product cartridge which is insertable into and removable from the housing. A substantially air tight seal is created between the product cartridge and the housing such that the interior of the housing forms a pressure chamber. A lower end of the product cartridge takes the form of a flexible plastic bag which holds the product. Two one-way valves are incorporated into the dispenser. One of these valves allows one-way flow of air from atmosphere into the flexible hollow squeeze member while the other of these check valves allows one way flow of air from the flexible hollow squeeze member into the pressure chamber of the housing.

Abstract: A toothpaste dispenser comprising a cylindrical tube of rigid material, partially surrounded by a flexible air compressing bag of rubber or other flexible material which has an air-tight fit with the tube whereby squeezing of the bag will create pressure in the bag and cylindrical tube and dispense toothpaste through an opening at the top of the tube. An air-tight, detachable bottom is provided for the tube and bag, which bottom has a one-way valve providing connection between the tube and bag. Various modifications are shown for the one-way valve.

Abstract: A toothpaste dispenser having a chamber which is operated by a flexible bag extending longitudinally alongside the chamber. A one way valve is provided at the bottom of the chamber through which air, under pressure, is introduced when the bag is compressed manually. A toothpaste pusher inside the chamber is moved vertically upwardly by the air under pressure introduced through the one-way valve. The toothpaste pusher takes the form of a bellows.