Method for dispensing a viscous material
US8255088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Jul 5, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05C11/1005
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method is provided for dispensing materials (20) with fluctuating viscosity over time, such as liquid adhesives. Using a control algorithm derived from viscosity data or lab testing results, a first pressure or mechanical drive speed is used to force viscous material (20) from a supply syringe (14) during a first dispensing cycle. After a certain amount of time, a correction model is applied to the control algorithm to increase the pressure or drive speed as viscosity of the material (20) increases. A second higher pressure or drive speed is then used to force viscous material (20) from the supply syringe (14) during a second dispensing cycle. The correction model can be based on empirical data about the viscous material (20), or a camera system (30) can be used to periodically adjust the pressure or drive speed as required to maintain a substantially uniform dispensing rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.