US 6,318,599 B2 · Electrically operated viscous fluid dispensing apparatus and method

Abstract

An electrically operated fluid dispenser for dispensing a pattern of viscous fluid onto a substrate during a run mode. The dispenser is turned off and does not dispense the viscous fluid during a standby mode of operation. The dispenser includes a dispenser body having an outlet and an armature disposed in the dispenser body for movement between an opened position allowing a fluid flow from the outlet and a closed position preventing the fluid flow from the outlet. A coil is mounted adjacent the armature and selectively generates an electromagnetic field for moving the armature between the opened and closed positions. A controller includes different apparatus and methods for using the coil as a heater as well as providing other heat transfer devices on the dispensing valve to maintain a constant temperature either, during only the run mode or, during both, the run and the standby modes. The above dispensing valve heating control facilitates a design of an electrically operated fluid dispenser having a body with a fluid passage intersecting first and second sides of the body and a dispensing outlet in fluid communication with the fluid passage. The dispenser includes a heater and has feed member mounted to the first side of the body with one end of the fluid passage in the feed plate fluidly connecting with one end of the fluid passage in the dispenser body. The dispenser also has an cap mounted to the second side of the dispenser body to terminate the fluid passage on the second side of the dispenser body.

Claims17

Dependent claims

An electrically operated fluid dispenser for dispensing a viscous fluid onto a substrate comprising:

a first body comprising
a fluid passage having
a first end intersecting a first side of said first body, said first end of said fluid passage adapted to receive the viscous fluid directly from a source of pressurized fluid, and
a second end intersecting a second side of said first body, said second end of said fluid passage not receiving the viscous fluid directly from the source of pressurized fluid, and
an outlet in fluid communication with said fluid passage;
a first armature disposed in said first body and movable between an opened position allowing a fluid flow from said outlet and a closed position preventing the fluid flow from said outlet;
a first coil mounted adjacent said first armature and selectively generates an electromagnetic field capable of moving said first armature between the opened and closed positions;
and
a first heater for maintaining said first coil at a substantially constant temperature.

6 more elements

An electrically operated fluid dispenser comprising:

a first body having a fluid passage intersecting first and second sides of said first body and an outlet in fluid communication with said fluid passage;
a first armature disposed in said first body and movable between an opened position allowing a fluid flow from said outlet and a closed position preventing the fluid flow from said outlet;
a first coil mounted adjacent said first armature and selectively generates an electromagnetic field capable of moving said first armature between the opened and closed positions;
and
a first heater for maintaining said first coil at a substantially constant temperature;
a second body having a fluid passage intersecting first and second sides of said second body and an outlet in fluid communication with said fluid passage, said first side of said second body being mounted adjacent said second side of said first body with one end of said fluid passage in said second body fluidly connecting with an opposite end of said fluid passage in said first body;
a second armature disposed in said second body for movement between an open position allowing a fluid flow from said outlet and a closed position preventing the fluid flow from said outlet;
a second coil mounted adjacent said second armature and selectively generates an electromagnetic field capable of moving said second armature between the open and closed positions;
and
a second heater for maintaining said second coil at a substantially constant temperature.

7 more elements

Dependencies are inferred from the claim text.

Electrically operated viscous fluid dispensing apparatus and method

Life of this patent

Electrically operated viscous fluid dispensing apparatus and method

Life of this patent

Abstract

Claims17