Method for lubricating pressure relief valves
US9821528B2 · kind B2 · utility
1Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2013 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Dec 13, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31B2160/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method for applying a lubricant to a pressure relief valve during the process of applying the pressure relief valve to packaging. The method includes temporarily separating layers of the valve with a vacuum applicator when the lubricant is applied. A pressurized nozzle sprays or atomizes the lubricant into the valve opening. Graphite suspended in liquid silicone is used as the lubricant; it is recirculated in a reservoir to keep the graphite in suspension. Optical sensors check for valves before the entrance to, and after exit from, the vacuum applicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.