Process for making impedance measuring module
US4067951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1975 |
| Grant date | Jan 10, 1978 |
| Priority date | — |
| Expiry date | Nov 19, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/48735
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is concerned with an injection mold for making a plastic impedance measurement module having a generally flat metal grid imbedded in the plastic thereof with a plurality of pairs of electrodes upstanding generally perpendicularly from said grid, one pair into each of a plurality of chambers, said electrodes being uncoated by said plastic. The process comprises placing the grid adjacent a first mold half of an injection mold with the electrodes each within a respective one of a plurality of slots extending into the first mold half, the first mold half having a first generally flat recessed portion defining a top surface of a base of the module and a plurality of channels extending from the first portion into the first mold half defining the plurality of chambers. The process further includes bringing together the first mold half and a second mold half having a second generally flat usually non-recessed portion for forming the injection mold, first support means extending from the second portion supportingly contacting the grid and injecting plastic into the mold to form the module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.