| 摘要 |
<p>A continuous can printer is constructed with a worm and star-wheel type input conveyor which delivers undecorated cans to cradles mounted along the periphery of a rotating carrier. The loaded cradles move axially to transfer the cans to horizontal spindles mounted on the same carrier and thereafter suction is applied to firmly seat cans on the spindles. The loaded spindles are positively controlled for radial movement whereby improperly loaded cans are positioned for ejection and properly loaded cans are positioned to engage the image transfer blanket of a printing unit, thereafter engage the applicator roll of an overvarnish unit, and then be transferred to a suction cup on a rotating wheel-type carrier of a transfer unit through the application of high pressure air at the spindle and the application of a vacuum at the suction cup. Controlled radial movement of the suction cups matches speed and path of movement thereof at a transfer region to the speed and path of pins on a conveyor chain that extends through a curing oven. At the transfer region the conveyor chain moves along an inclined path while the transfer carrier rotates on a horizontal axis so that in the transfer region the conveyor pins move toward the transfer carrier to enter cans carried by the suction cups. In the transfer region controlled axial movement of the suction cups gradually displaces them toward the conveyor pins. At the outfeed end of the transfer region each conveyor pin is entered well into a can and this can falls free of its holding suction cup when the vacuum thereat is released.</p> |
