| 摘要 |
428,137. Wheel tyres; endless-tracks for vehicles ; boots and shoes; cutting- machines. SOMMER, R., 12, Waitzstrasse, Charlottenburg, Berlin. Nov. 3, 1933, Nos. 30572, 30573, and 30574. Convention dates, Nov. 4, 1932, Dec. 19, 1932, and Dec. 19, 1932. [Class 144 (ii)] [See also Groups VII, VIII, and XXXI] A tyre tread is provided with transverse or oblique grooves so as to form narrow ribs such as shown at 3, 4, Fig. 1. The grooves may extend wholly or partially across the tread and, as shown in Fig. 5, the grooving 12 may be provided on a tyre having an existing non-skid tread pattern. The Specification as open to inspection under Sect. 91 describes also (a) the provision of such grooves and ribs on rubber belts for endless-track vehicles and rubber soles for boots and shoes ; and (b) a machine for cutting the grooves. The machine, shown in Fig. 10 (Cancelled), comprises a series of rotary cutters 70 mounted, with adjustable spacers 71, on a shaft 72 which is driven by a flexible shaft 73. The depth of the cuts may be adjusted by means of gauges 82 fitted on collars 75. Tubular hand-grips 84 are mounted on ball-bearings on extensions 83 of the shaft 72. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specifications 198,791, [Class 144 (ii)], and 401,479. |
