Method for dispensing reagent onto substrate
AssigneeBio Dot, Inc.
InventorTHOMAS C. TISONE
Life of this patent
Estimating the term…
Abstract
A method and apparatus for dispensing precise quantities of reagents is disclosed including a positive displacement syringe pump in series with a dispenser, such as an aerosol dispenser or solenoid valve dispenser. The pump is controlled by a stepper motor or the like to provide an incremental quantity or continuous flow of reagent to the dispenser. The pump and dispenser are operated in cooperation with one another such that the quantity and/or flow rate of liquid dispensed by the dispenser can be precisely metered substantially independently of the particular operating parameters of said dispenser to attain a desired flow rate, droplet size or mist quality, droplet frequency and/or droplet velocity.
Claims41
An apparatus for dispensing predetermined quantities of liquid onto a substrate, comprising:
- a dispenser having an inlet and an outlet and being adapted to form droplets of said liquid having a predetermined size and/or quality which are deposited onto said substrate;
- and
- a positive displacement pump hydraulically arranged in series with the inlet of said dispenser for metering predetermined quantities of said liquid to said dispenser;
- whereby the quantity and/or flow rate of liquid dispensed by said dispenser can be precisely metered substantially independently of the particular operating parameters of the dispenser.
An apparatus for dispensing a liquid onto a substrate, comprising:
- a dispenser having an inlet and an outlet and a valve adapted to be opened and closed at a predetermined frequency and duty cycle to form droplets of said liquid which are deposited onto said substrate;
- and
- a positive displacement pump hydraulically arranged in series with the inlet of said dispenser for metering predetermined quantities of said liquid to said dispenser;
- whereby the quantity and/or flow rate of liquid dispensed by said dispenser can be precisely metered substantially independently of the particular operating parameters of said dispenser.
A method for dispensing a liquid onto a substrate comprising the steps of:
- movably transporting the substrate;
- metering a predetermined quantity or flow rate of said liquid using positive displacement means;
- supplying said metered quantity or flow rate of said liquid to a dispenser to form droplets of a predetermined size and/or quality which are deposited onto said substrate;
- and
- regulating the metering of said predetermined quantity or flow rate of
- said liquid and transporting of said substrate so that the density of said liquid deposited on said substrate is independently controlled in terms of volume per unit length of said substrate.
Dependencies are inferred from the claim text.