| 摘要 |
PURPOSE:To discriminate the front and back of a multi-layered foam sheet having a laminate film on the single surface thereof automatically, simply and certainly, by discriminating the front and back of said sheet on the basis of the difference between the physical properties of the front and back of the sheet. CONSTITUTION:A form sheet having a laminate film or other heterogeneous layer laminated to the single surface thereof is allowed to pass between discrimination rotary rollers to automatically discriminate the front and back of said sheet on the basis of the difference of the physical properties of the front and back of the sheet. For example, at the judge part II being the principal point in a foam polystyrene sheet separation apparatus, judge rolls 40, 40 utilize the difference between physical properties, for example, surface states such as friction resistances on the side of the laminate film 20 and on the side of the foam polystyrene sheet 10 and the front and back of the base material sheet piece A introduced between judge rolls 40, 40 without distincting the front and the back are discriminated by the judge rolls 40, 40.
|
