| 摘要 |
<p>1,238,805. Sheet forming. AMP Inc. 25 June, 1969 [3 July, 1968], No. 32033/69. Heading B5A. [Also in Divisions B6 and H2] A tubular element is externally or internally sheathed by sucking or blowing a heat-softened sheet into contact with it. The element may be located upon a vacuum forming mandrel or within a female vacuum or blowing mould and the element may be a partially threaded metal or plastics nut or screw, a gasket washer, or a sleeve forming part of an electric terminal. In one embodiment, see Fig. 2, a series of crimpable metal sleeve terminals are located over mandrel 1 and a heat softened plastics sheet 12 drawn into contact with the mandrels to form a series of insulation sheathed terminals in the sheet, each terminal having a base 13, a gripping bulge 14 and a flared mouth 15. Excess sheet material is removed from between the terminals (see Figs. 3 and 4, not shown) to leave a strip of interconnected terminals. In a second embodiment (Figs. 8 and 9, not shown) metal or plastics sleeves are placed upon vacuum mandrels and a sheet formed against the mandrels as before. In this embodiment, however, a flared mouth of rectangular not circular cross-section is formed on the sheathed terminals. In a third embodiment, see Fig. 6, an insulation sheathed splice terminal having open wire receiving ends and a central inspection port is vacuum formed upon a mandrel having a removable enlarged end 24. After the forming the mandrel is withdrawn from the moulded article, the base 32 severed from the rest of the article, and the end 24 removed. In a fourth embodiment, see Fig. 10, a strip 41 of interconnected ring tongue terminals having barrel portions 43 apertured at 45 is located in a channel 46 of a vacuum assembly and a vacuum applied through channels 49 to draw a heat-softened sheet over the barrel portions. The sheet may be of PVC, polyamide or polyethylene.</p> |
