| 摘要 |
678,431. Pneumatic tyres. UNITED STATES RUBBER CO. March 21, 1951 [April 5, 1950], No. 6739/51. Addition to 651,628. Class 144 (ii). A modification of the air-tube forming the subject-matter of the parent Specification, comprises a main tube 37 formed of air-retaining material such as butyl rubber over the major portion of which is secured a reinforcing band embodying two plies 38, 39 of strain-resisting filaments, such as nylon, and a highly-extensible rim-seating flap 43 secured by its edges 44, 45 to the edges 40, 41 of the reinforcing-band. Specification 641,409 is referred to. |
