| 摘要 |
<p>1,218,643. Coated threaded fastener; coating apparatus. AMERACE ESNA CORP. 5 Feb., 1968 [6 Feb., 1967], No. 5758/68. Headings B2E and B2L. [Also in Division F2] A threaded fastener is made self-locking by the provision of a patch of solid thermoplastic material bonded to a plurality of convolutions of the surfaces of the thread and gradually merging at its boundary edge portions into those surfaces, the material containing from 0.1% by weight to 5% by weight of molybdenum disulphide. The apparatus for making the fastener self-locking is the same as that described in Specification 1,218,644 but if the fastener need not be self-sealing the patch may extend circumferentially over less than 200 degrees.</p> |
