| 摘要 |
<p>1335428 Double glazing FLACHGLAS AG DELOG-DETAG 9 July 1971 [15 July 1970] 32267/71 Heading E1R [Also in Division B5] A sound suppressing double-glazed pane comprises spaced sheets sealed together at their edges, one sheet comprising sub-sheets 4 joined by a lamina 3 of visco-elastic material which is at least twice, e.g. three times the normal thickness of 0.38mm., and the other sheet being twice the thickness of sub-sheets 4. Preferably the lamina 3 comprises a plurality of films of polyvinyl butyral material each of 0.38mm thickness. The spacer may comprise a member (6) secured by elastic adhesive (7) and a slotted member (8) mounted by foam rubber (9).</p> |
