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AssigneeIllinois Tool Works Inc.
InventorsThomas C. Prentice, Kenneth C. Crouch
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A dispenser for dispensing a volume of viscous material on a substrate includes a frame, a gantry system coupled to the frame, and a dispenser unit coupled to the gantry system. The dispenser unit includes a housing having a chamber and a piston disposed in the chamber. The piston is configured to move between a pre-dispense position and a dispense position within the chamber. The dispenser unit further includes a dispensing bore configured to receive the piston therein and a nozzle coupled to the housing. A controller is coupled to the piston to control the operation of the piston. The dispenser is constructed such that a volume of viscous material dispensed from the dispensing bore is substantially equal to the volume of the piston entering the dispensing bore when moving the piston to the dispense position. Other embodiments and methods of dispensing viscous material are further disclosed.
A method of dispensing viscous material from a dispenser of the type having a chamber, an opening to deliver viscous material to the chamber, a dispensing bore in fluid communication with the chamber, and a piston movable within the dispensing bore, the method comprising:
A method of dispensing viscous material from a dispenser of the type having a chamber, a dispensing bore in fluid communication with the chamber, and a piston movable within the dispensing bore, the method comprising:
A method of dispensing viscous material from a dispenser of the type having a chamber, a barrel having an elongated bore formed therein, the barrel being disposed in the chamber, a dispensing bore in fluid communication with the chamber and the elongated bore of the barrel, and a piston disposed within the elongated bore of the barrel and configured to enter the dispensing bore to dispense a quantity of viscous material, the method comprising:
Dependencies are inferred from the claim text.