| 摘要 |
<p>1,177,963. Netting device. UNION CARBIDE CORP. 16 Feb., 1967 [17 Feb., 1966]. No. 7456/67. Headings D1J and D1R. A netting machine comprises a pair of spaced apart, advancing endless chains 36, 37 carrying thereon a plurality of strand loop-receiving pins 57 and 58 and a looping member 89. (The latter is shown in side elevation in Fig. 4.). The looping member includes a cradle 82 pivotally mounted on an axis 84 which must be below the chains 36, 37, and a longitudinally extending carriage 77 which is slidably mounted on the upper ends 87, 88 of the cradle. The carriage 77 carries strand feed guides 74 pivotally mounted at 81. In use the looping member moves the strand guides 74 laterally across the path of the advancing pins and then advances them to the speed of the pins when they have passed the middle of .their lateral motion. The lower ends (57) of the strand guides are then pivoted outwardly through the spaces between the pins and then inwardly around the other side of the advancing pins. The extreme positions of the guides are shown in dotted lines. The looping member and the guides are then retracted relative to the pins and moved in the opposite lateral direction. The curved path of the extremities of the guides 74 may be above the level of the tips of the pins near the middle of the lateral motion; but desirably the curved path around the pins is below the level of the tips, see Figs. 5, 6 and 7 not shown. The strands can be fed to the guides under a predetermined air pressure applied through tubes 152. The air can be sucked or blown through the tubes 152 in order to counteract tension in the strands. The looping member can be advanced and retracted by crank arm 123 which is adjustably located in crank wheel 119. The strand guides can be pivoted by Bowden cables operated by a cam follower 137 running in track 138. The strands can be fed to the netting machine from packages via flexible conduits through which air is pumped or sucked, see Fig. 3 not shown.</p> |
