Patent ID: 6869482
Filing Date: 2005-03-22
Classification: B28B,H01L

Abstract:
1. An apparatus for manufacturing a dry sheet from a slurry, comprising: a coating section which coats a slurry raw material to be formed into a sheet, onto a carrier film transferred along a predetermined route; a thickness-adjusting device which adjusts the thickness of the coating of the slurry raw material disposed on the carrier film; a drying section which dries the slurry raw material disposed on the carrier film to form a sheet; a property-measuring device which measures a predetermined property, related to the coating thickness of the slurry raw material disposed on the carrier film, in a wet mode before the material is dried in the drying section; a density-measuring instrument which measures the density of the slurry raw material; a memory section for storing data representative of a relation among the wet-mode measurement of the property of the slurry raw material disposed on the carrier film, the density of the slurry raw material, and the final thickness of the sheet obtained after the slurry raw material is dried; an operational section which estimates a sheet thickness on the basis of the data stored in the memory section, the value of the property of the slurry raw material measured by the property-measuring device, and the density of the slurry raw material, and compares the estimated value with a target value of the sheet thickness; and an output adjusting section which transmits thickness-adjusting signals to the thickness-adjusting device in response to the comparison result obtained in the operational section.