A method and apparatus are disclosed for filling a cell cavity positioned between a first substrate and a second substrate with a cell filling liquid. The method entails forming at least one evacuation cavity encompassing at least a portion of an outer surface of each of the first and second substrates...http://www.google.com.au/patents/US5856211?utm_source=gb-gplus-sharePatent US5856211 - Method for filling the cavities of cells with a chromogenic fluid
