2830 



Chapter 23 



^WV/^^^=^ 



Figure 23-60. — Vacuum former with swing spouts. 



(Top) Schematic of swing spout former element 



1. Fiber supply 



2. Inlet funnel 



3. Swing spout 



4. Drive 



5. Forming screen 



6. Fiber excess along edges of mat (also 7) 

 8, 9. Vacuum ducts 



10. Vaccum 



11. Shave-off roll 



12. Furnish return 



13. 14. Walls of forming chamber 



(Bottom) Four-stage vacuum former with element for forming fine surface layer. 



1. Forming screen 



2. Vacuum 



3. Formers for surface layers 



4. Formers for core 



5. Former for fine surface layer 



6. Shave-off rolls 



7. Automatic mat scale 



8. Prepress 



(Drawing after Lampert 1967.) 



