| 摘要 |
1,189,921. Shaped polyester laminate. SQUARE D CO. 7 Feb., 1968 [22 May, 1967], No. 6086/68. Heading B5N. [Also in Division H1] An electric bus-bar is insulated with a laminated sleeve comprising layers 11 and 13 of polyester film between which layer 12 of non- adhesive varnished glass cloth is held by friction. The sleeve is made by forming the assembled layers into a U-shape, heating the inside, forming into tubular shape, heating the outside and cooling. |
