| 摘要 |
PURPOSE:To highly accurately control the feed rate of a film with respect to a sheet material by a method wherein a driving motor is controlled so as to coincide with the target value by measuring the interval of the register marks of the film at the position between a feed roll and a laminate roll and compensating the reference voltage with the specified compensating voltage in case that the measured value does not coincide with the target value. CONSTITUTION:In order to make the interval of the register marks of a film 6, on which register marks are put at design intervals (l), coincide with the target value L, the driving speed of the driving motor of a feed roll is controlled with the reference voltage corresponding to l.V1/L so as to make the running speed of the film 6 along the circumference of a film feeding feed roll 11 l.V1/L with respect to the running speed V1 of a sheet material 3. In addition, the running speed V1 of the sheet material 3 and the running speed V2 of the film 6 on the course between the feed rolls 11 and laminate rolls 7 and 7' are measured at all times and the interval ln of register marks of the film 6 on the course between the feed rolls 11 and the laminate rolls 7 and 7' is also measured at all times. If the measured ln does not coincide with L, the reference voltage is compensated with the compensating voltage, which corresponds to the result of the comparison between V2 and ln./L, so as to control the driving motor in order to coincide ln with L. |
