| 摘要 |
<p>An optical transmissivity measuring apparatus is disposed at the inlet to a pouch laminator for discriminating between a high and low optical transmissivity of the leading edge (18) of a pouch (19), thereby detecting the correct orientation of the pouch (19). A thickness sensor is provided at the inlet and an optical detector ensures a thickness measurement of the two films comprising the pouch can be made, while also responding to instantaneous variations in the thickness of the pouch and allowing the lamination process to be controlled accordingly. A monitoring system checks the progress of pouches (19) through the laminator to mitigate or avoid jamming. A heating chamber of the laminator comprises two pairs of hot rollers with heating elements mounted between them and mounted in integral heat-conductive shields surrounding the hot rollers.</p> |
