| 摘要 |
<p>973,505. Rollers. CIBA Ltd. March 3, 1961 [March 4, 1960], No. 7840/61. Heading F2U. [Also in Divisions B3 and B5] A tool for making surface patterns comprises a plurality of juxtaposed circular discs each having a series of sawtooth-like projections formed in its peripheral edge the discs being mounted on a common mount so that the sawtooth-like projections form a regular surface pattern as shown in Fig. 3. In an embodiment a large number of saucer-shaped discs 62 are mounted on a bolt 60 and held together by a nut 64. Two pins 72 secure the discs against relative rotation. The sawtooth surfaces are produced with a high surface quality by milling and polishing or by a diamond cutter prior to assembly of the tool and such surface is not impaired during assembly of the tool. French Specification 1,268,800 is referred to.</p> |
