| 摘要 |
A material handling method including a method of threading a strip of material, such as plastic film, into a pneumatic moving means including the steps of moving a web of film from a supply source along a first path by first moving means; slitting the web as it moves in the first path to form a leader strip; moving the strip in the first path by the first moving means and into operative relationship with a pneumatic moving means threadup device; thrusting the leader strip into threadup position with respect to a pneumatic second moving means including at least a strip first transport tube having a strip entrance opening positioned adjacent the first path; cutting the thrust strip while it is in this threadup position; and, pulling the leading edge of the cut strip into the entrance opening of such transport tube to thread it into such pneumatic second moving means. Such web handling method further includes a method of threading such strip and the web it is formed from onto a windup roll for winding thereupon including the steps of moving the strip in a second path by the pneumatic second moving means and through a strip exit opening of a strip transport tube of the pneumatic second moving means and into operative relationship with a windup roll threadup device consisting of a curved guide chute having spaced flexible members connected thereto, such flexible members being in contact with the surface of a windup roll and air currents from the exit opening of such transport tube passing along the chute surface, through the spacings of the flexible members and adjacent the roll surface to guide, pneumatically and mechanically, the leading edge of the strip into threadup position with respect to the windup roll and into contact with the surface of such windup roll; connecting the leading edge of the strip to the windup roll; pulling the strip from the transport tube or tubes through a slot therein and into a third path defined by process rolls; expanding the strip to form the full width web; moving the full width web in the third path; and, winding such web onto the windup roll.
|
