| 摘要 |
922,292. Reinforcing plastic film. DRIX PRODUCTS Ltd. Nov. 15, 1960 [March 28, 1960], No. 10852/60. Class 42 (1). A reinforced plastic film comprises a reinforcing sheet material bonded to the film and protected from contact with the atmosphere by sealable air and moisture impermeable material. In the embodiment shown a metal eyelet 12 is to be secured in a film 11 e.g. polyethylene sheeting. A piece of adhesive-treated canvas 14 is folded around the edge 13 of film 11 and is pressed into adherent contact therewith. Then a somewhat larger piece 15 of compatible heat-sealable material is folded around edge 13 so as to completely overlie canvas 14. The heat-sealable material 15 is sealed simultaneously to both faces of film 11 along line 16. The entire sandwich is then perforated and the twopart eyelet 12 secured in position. In an alternative embodiment the reinforcing sheet is impregnated with the sealable air and moisture impermeable material. |
