Postage meter housing arrangement having RF and electromagnetic induction shielding
US5204807A · kind A · utility
3Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1992 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Aug 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00233
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In order to eliminate complex sheet forming operations, to provide an effective heat sink and to shield against radio frequency interference and electromagnetic induction effects, the housing arrangement has two assemblies which each comprise, inter alia, a die casting made of zinc or other material having equivalent radio frequency interference and electromagnetic induction shielding properties. A main logic circuit board is shielded by the two die castings when they are assembled together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.