| 摘要 |
905,288. Moulding contact lenses. DE CARLE, J. T. Sept. 28, 1959 [June 8, 1959], No. 32884/59. Class 87(2). Two contact lenses are moulded by placing a sheet 16 of polymethyl methacrylate over a mould 12 placing a male mould member 14, e.g. a polished ball bearing, on the sheet, placing a further sheet 16 on the member 14, a further mould 12 on the sheet and pressing the assembly by a pin 36. The moulds may be arranged in two rows in a block 20, heated by electric elements 46, 46a and cooled by water passages 52. Pressure is applied to the pins 36 by a lever 38 having a weight 40, which lever may be pivoted at 42 to enable it to act on either row of pins. Specifications 731,155, 831,546, 859,458, 868,178 and 905,289 are referred to
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