Drying installation for glued forms - using micro waves applied through hollow conductor fitted with guide slots for paper stacks

摘要

The installation is designed to dry the glue which is applied to paper sheet stacks such as sets of forms using microwaves where the drying area is formed by a long extending high frequency energy field to guide through the glued edge areas of the paper sheet stacks. The high frequency energy field (20) is built up in the interior of a long extending hollow conductor which has a guide slot (21) parallel to the length axis to receive the glued edge areas of the paper stacks and to guide them along the interior space of the hollow conductor. The hollow conductor has a curve along the entry area of the paper stack and the guide slot commences at that curve.