M40*f under HIGH VACUUM D P I ' s n e w e s t a n d largest h i g h vacuum coat i n g units can n o w b e e q u i p p e d t o accept l o n g r o l l s of such varied m a t e r i a l s as p a p e r , cellulose acetate s h e e t i n g , o r synthetic tex tiles. T h e n , u n d e r vacuum, t h e s e m a t e r i a l s c a n be c o n t i n u o u s l y coated w i t h such met als as g o l d , silver, beryllium, a l u m i n u m , chromium, or copper. X h e p r o c e s s is really s i m p l e — a set of r o l l e r s conveys t h e m a t e r i a l t h r o u g h t h e v a c u u m c h a m b e r at a c o n s t a n t s p e e d , w h i l e a c r u c i b l e of t h e c h o s e n m e t a l is h e a t e d by h i g h frequency i n d u c t i o n t o t h e p o i n t of e v a p o r a t i o n . U n d e r h i g h v a c u u m t h e metal lic v a p o r travels in a s t r a i g h t l i n e f r o m t h e c r u c i b l e t o f o r m a s p a r k l i n g , brilliant, a n d d u r a b l e surface o n t h e m a t e r i a l . "With t h e d e v e l o p m e n t of t h e s e l a r g e u n i t s c a p a b l e of c o n t i n u o u s o p e r a t i o n , t h e p r o c e s s of c o a t i n g u n d e r h i g h v a c u u m n o w h a s a p r a c t i c a l a p p l i c a t i o n i n m a n y n e w fields.
T h e production, of c o n d e n s e r p a p e r s , t h e d e c o r a t i v e coating o f p l a s t i c s h e e t s , a n d the metallizing o f cloth a r e b u t a few of t h e new industrial uses. O t h e r high capacity units for b a t c h p r o duction a r e available. T h e i r s p a c i o u s w o r k i n g a r e a s accept large pieces i n d i v i d u a l l y o r small pieces in quantity. N e w p u m p i n g fa cilities p r o d u c e l o w e r p r e s s u r e s a n d m o r e r a p i d o p e r a t i n g cycles. All D P I c o a t i n g units a r e supplied c o m p l e t e e x c e p t for h e a t e r filaments a n d w o r k - h o l d i n g j i g s w h i c h m u s t be Tailored f o r t h e j o b .
For fuli information on DPI High Vacuum Coating Units write
DISTILLATION PRODUCTS, INC. Roches ter 1 3 / N e w Y o r k The DPI catalog "High Vacuum Equipment/' fully illustrated, technically descriptive, is available upon request.
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