Non-contact liquid material dispenser having a bellows valve assembly and method for ejecting liquid material onto a substrate
US6267266A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | Jul 31, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/3489
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus for dispensing a small amount of a viscous liquid material onto a substrate, the apparatus comprising a housing and piston positioned within the housing and having a lower surface and a flow bore extending therein, the flow bore having an inlet for receiving the viscous liquid material and an outlet. The apparatus further includes a compressible dispensing element positioned within the housing below and in liquid tight sealing engagement with the lower surface of the piston and having a passage extending therethrough, the passage having an inlet in liquid communication with the outlet of the flow bore and an outlet. The lower surface of the piston is capable of applying a force to compress the dispensing element causing the passage to at least partially close expelling a small amount of the viscous liquid material from the outlet of the passage. The apparatus has a nozzle in liquid communication with the outlet of the passage for guiding the small amount of viscous liquid material expelled from the outlet of the passage onto the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.