| 摘要 |
<p>A method is described for producing slitted plastic film sheets of the type used for wrapping lettuce and similar produce. A form of punch press is used with an upper ram and lower platen and a tray moves in and out horizontally between the ram and platen. On the tray is a die with slitter blades over which is placed a large number of plastic film sheets arranged in a stack. The tray moves in and the ram presses down on the sheets, cutting slits. Then the tray moves out and the slitted sheets are removed. A single operator can produce 450 slitted sheets per minute with this system.</p> |
