| 摘要 |
721,252. Air cushions &c. JACQUIGNON, N. Sept. 25, 1952 [Sept. 27, 1951], No. 24101/52. Classes 52 (2) and 52 (4). A sanitary cushion or mattress comprises three superposed sheets of impermeable material united to form an upper air pocket 6 and a drainage tray 3, the pocket being provided with drainage depressions and apertures 11. An upturned flap 5 is provided on the lower sheet 3 which can be turned down for emptying or alternatively the end can be closed and an outlet valve provided. |
