Belt with rubber and seamless substrate layers

Abstract

An outer solid rubber sheet layer having a maximum thickness dispersion value of 0.04 mm is adhered to an inner resin seamless film layer with low stretchability forming a seamless adhered one piece two layer cylinder. The cylinder is formed by placing the two layers between an outer casing mold and a core mold and applying a pneumatic pressure to the cylinder outside of the core mold for vulcanizing and adhering the rubber to the resin film.

1 . A belt made by the steps comprising: 
 forming an elastic solid rubber sheet having a maximum thickness dispersion value of 0.04 mm;    laying the solid rubber sheet onto a seamless substrate with relatively low elasticity while abutting both ends of the rubber sheet to form a layered cylinder;    placing said layered cylinder between an outer casing mold and a core mold where said seamless substrate faces radially inwardly; and applying a pneumatic pressure to the layered cylinder for vulcanizing the rubber sheet and for adhering said rubber sheet to said substrate to form a one piece two layer cylinder.    
   
   
       2 . The belt according to  claim 1  made with the further step of forming a coated layer on the outer surface of the adhered one piece two layer cylinder.  
   
   
       3 . The belt of  claim 1  wherein the seamless substrate layer is formed from a resin.  
   
   
       4 . A belt comprising: 
 an outer elastic solid rubber sheet layer having a maximum thickness dispersion value of 0.04 mm; and    an inner seamless substrate layer with relatively low elasticity bonded to the outer layer to form an adhered one piece two layer cylinder.    
   
   
       5 . The belt of  claim 4  wherein the rubber sheet has abutting opposing ends.  
   
   
       6 . The belt of  claim 4  wherein the outer and inner layers are bonded by vulcanization.  
   
   
       7 . The belt of  claim 4  wherein the seamless substrate layer is formed from a resin.