| 摘要 |
1463227 Eyeshield filters DEUTSCHE SPEZIALGLAS A G 8 Aug 1975 [23 Aug 1974] 33261/75 Heading G2J A filter for a welder's eye-shield comprises two plastics panes 10, 12. Connected around their peripheries 18 and separated by an air-gap 16, the pane 10 which is nearest the eye when in use having an infrared reflecting layer 14 on its inner surface. The panes 10, 14 may be planar or curved. The pane 10 may be recessed to receive the layer 14 when the panes have the same curvature. The layer 14 may be gola or copper. |
