Electrically operated viscous fluid dispensing apparatus and method
US6318599A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2001 |
| Grant date | Nov 20, 2001 |
| Priority date | — |
| Expiry date | Jan 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1919
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
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 ha…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.