Digital thermometer and method of manufacture

专利名称：Digital thermometer and method of

manufacture

发明人：Robert Parker申请号：US05/517718申请日：19741024公开号：US03965742A公开日：19760629

摘要：A non-breakable digital thermometer and a method for its manufacture areprovided. The thermometer comprises a plastic strip, either flexible or rigid, ofmicroencapsulated temperature responsive liquid crystal material in a lateral array ofnumerical indicia, each index having associated with it liquid crystals having a temperatureresponsive range relevant to the numerical value of the index. Overlap of temperatureresponsive ranges is provided to insure at least one visible indicia, when the temperaturebeing measured is within the range of interest.< P>

A substantially continuous sheet of an inert transparent base is sequentially printedwith a darkly pigmented mask defining transparent indicia areas. Different liquid crystalcomposition slurries are coated in a continuous stripe over the appropriate indicia, withadjacent compositions allowed to mix at the edges, before rapid partial drying preventsadditional mixing. The compositions are then dried substantially completely, and coatedwith a darkly pigmented coating. Individual strips are then cut transverse to the directionof movement of the film so as to provide individual digital thermometers.

申请人：RPR, INC.

代理机构：Townsend and Townsend

更多信息请下载全文后查看