Dentsply Research & Development Corp.

Dentsply International Inc.

Nordson Corporation

Dentsply Sirona Inc.

Curt E Metzbower

Matthew E Pappalardo

Paul Richard Pierson

Robert W Springhorn

Robert J Pieroni

Peter Ngu

Marc A Goldberg

Michael A Schnoor

Robert C Brennan

A package () for the storage and dispensing of a plurality of materials includes a first and a second longitudinally juxtaposed barrels (). Each barrel () having a first and a second end (). Each first and second barrels () having a quantity of at least one of the materials initially contained therein, and each barrel having an open end () and a dispensing end (). A sealing plunger () disposed in each barrel () such that the material in each barrel () is initially positioned between the dispensing end () of the barrels () and the respective ones of the sealing plungers (). A snap cap () is contiguously formed to initially close each of the dispensing ends () of the barrels (), such that the snap cap () may be broken from the barrels () to thereby forming a secondary open end () at the dispensing end () of the barrels (), thereby facilitating the material contained in each barrel () to flow through and be dispensed.

Package and dispensing system

A propellant actuated dual fluid cartridge which does not need a separate dispensing mechanism is disclosed.

Propellant actuated dual fluid cartridge

The invention provides a method of extruding dental material from a capsule-like cartridge, by providing a capsule-like cartridge having an elongated body and a nozzle. The elongated body has an inner chamber wall enclosing dental material. The nozzle has an inner channel wall, and a channel wall exit orifice rim. The inner chamber wall has a chamber wall exit port rim, opening between the inner chamber wall and the inner channel wall. The chamber wall exit port rim has a chamber wall exit port rim effective diameter D. The inner channel wall has an inner channel wall effective diameter D. The inner channel wall effective diameter Deffectively is greater than the chamber wall exit port rim effective diameter D.

Cartridge for viscuos dental material

A dispensing syringe ( ) has a barrel ( ) keyed ( ) to a gripping assembly ( ) having complementary keyed surfaces ( ). A nut having dual threads ( ) of differing diameters is threaded to one end of the barrel ( ) and receives a matingly threaded ( ) plunger ( ). Turning the plunger ( ) causes it to advance within the barrel ( ) due to the interaction of the mating threads ( ). The gripping assembly ( ) is provided with winged projections ( ) that facilitate handling and manipulation of the syringe ( ). The complementary keyed surfaces ( and ) physically interact so as to prevent the gripping assembly ( ) from turning or twisting about the barrel ( ) during use.

Dispensing syringe

Growing community of inventors

Washington Crossing, PA, United States of America

Curt E Metzbower