| 摘要 |
An automated machine for manufacturing packets of moist hand towelettes wherein sheet material forming the outer foil wrappers of the packets is intermittently fed through the machine to intersect towelette material being fed in a direction transversely thereof, with insertion of the towelettes to within the sheet material forming the packets occuring at the intersection of the feed directions. The machine operates intermittently by suspending the sheet material drive to permit performance of machine operations, including dual-stage heat sealing of the sheet material to form the packets and simultaneous introduction of towelettes and a moisturizing liquid, while the sheet material is stationary. Power is delivered to the machine through a main drive shaft which has mounted thereon a series of cam organized to control the timing sequence of certain functions of the machine by actuation of appropriate cam follower mechanisms. The intermittent feeding of the wrapper material is accomplished through a transmission mechanism which intermittently transmits power from the main drive shaft to an auxiliary shaft to operate the feed rollers driving the sheet material. The auxiliary shaft receives about half the rotational motion of the main shaft and an electric eye scanner mechanism, controlling a clutch interposed between the feed rollers and the main shaft, maintains the precision of the sheet material feed control. The wrapper continuously is fed from a normally continuous operating feed roller which is synchronized to the intermittent machine operation by a dancer roll mechanism which temporarily terminates the continuous feed when it is in excess of machine requirements. The wrapper material is converted from a generally planar horizontal continuous strip, into a vertically folded arrangement to partially form the packets by a triangularly-shaped plate and a pair of upright posts downstream thereof which constrict the material to form a bottom fold with its edges uppermost and spaced proximate each other. Stuffing bars are reciprocally vertically moved in a particular sequence for stuffing the towelettes into the partially formed packets. A liquid feed mechanism including conduits extending through the stuffing bars injects moisturizing liquid into the towelette packet simultaneously with stuffing therein of the towelette material. Heat sealing of the sheet material occurs in two stages, with a first heat sealing operation partially forming the packets into which towelettes are stuffed and with a subsequent heat sealing operation completing formation of the sealed packets.
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