Method of forming capsules containing a precise amount of material
US4596681A · kind A · utility
39Cited by
15References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1984 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | Jan 4, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S65/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of forming a sealed capsule containing a submilligram quantity of mercury or the like, the capsule being constructed from a hollow glass tube, by placing a globule or droplet of the mercury in the tube. The tube is then evacuated and sealed and is subsequently heated so as to vaporize the mercury and fill the tube therewith. The tube is then separated into separate sealed capsules by heating spaced locations along the tube with a coiled heating wire means to cause collapse spaced locations therealong and thus enable separation of the tube into said capsules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.