Replaceable sleeve

Abstract

A replaceable sleeve having a working surface is provided which is adapted to be mounted on a carrier. The sleeve includes an inner polymeric layer, a reinforcing layer overlying the inner layer, an intermediate polymeric layer overlying the reinforcing layer, and an outer polymeric layer. The sleeve may include a cushion layer between the intermediate layer and the outer layer. The layers comprising the sleeve are formed around a support and then cured simultaneously in a single step. The resulting sleeve may be used in printing operations or in other applications such as coating, embossing, laminating, calendering and the like.

What is claimed is:  
     
       1. A replaceable sleeve adapted to be mounted on a carrier comprising: 
       a) an inner polymeric layer;  
       b) a reinforcing layer comprised of fibers, said reinforcing layer overlying said inner layer and being adhered directly thereto;  
       c) a substantially void-free intermediate polymeric layer overlying said reinforcing layer and being adhered directly thereto; and  
       d) an outer polymeric layer forming a working surface; wherein said inner polymeric layer has a Shore A hardness which is equal to or greater than the Shore A hardness of said intermediate and outer polymeric layers.  
     
     
       2. The replaceable sleeve of  claim 1  in which each of said layers has a thickness of from about 0.005 to 0.750 inches. 
     
     
       3. The replaceable sleeve of  claim 1  in which said layers have been cured in a single vulcanizing step. 
     
     
       4. The replaceable sleeve of  claim 1  wherein said sleeve is seamless. 
     
     
       5. The replaceable sleeve of  claim 1  in which said inner layer, said intermediate layer, and said outer layer are comprised of materials selected from the group consisting of butyl rubber, nitrile rubber, EPDM rubber, natural rubber, synthetic rubber, neoprene rubber, blends of nitrile rubber and polyvinyl chloride, and polyurethane. 
     
     
       6. The replaceable sleeve of  claim 1  in which said inner layer comprises a carboxylated nitrile-butadiene copolymer. 
     
     
       7. The replaceable sleeve of  claim 1  in which said inner layer, said intermediate layer and said outer layer have a Shore A durometer hardness of from about 20 to 90. 
     
     
       8. The replaceable sleeve of  claim 1  in which said inner layer has a Shore A durometer hardness of at least about 70. 
     
     
       9. The replaceable sleeve of  claim 1  in which said reinforcing layer is comprised of a material selected from the group consisting of polyester, cotton, fiberglass, cotton-wrapped polyester, rayon, carbon filaments, and other high modulus synthetic or organic fibers. 
     
     
       10. A method of making a replaceable sleeve adapted to be mounted on a carrier comprising the steps of: 
       forming an inner polymeric layer in a cylindrical shape;  
       mounting said inner layer onto a support;  
       applying a reinforcing layer comprised of fibers over an outer surface of said inner layer and adhering said reinforcing layer directly thereto;  
       applying an intermediate polymeric layer over an outer surface of said reinforcing layer and adhering said intermediate polymeric layer directly thereto;  
       applying an outer polymeric layer directly over an outer surface of said intermediate polymeric layer; and  
       curing said layers to form said sleeve; wherein said inner polymeric layer has a Shore A hardness which is equal to or greater than the Shore A hardness of said intermediate and outer polymeric layers.  
     
     
       11. The method of  claim 10  in which said layers are cured at a temperature of between about 285° F. to 310° F. 
     
     
       12. The method of  claim 10  in which said inner layer, said intermediate layer, and said outer layer are comprised of a material selected from the group consisting of butyl rubber, nitrile rubber, EPDM rubber, natural rubber, synthetic neoprene rubber, a blend of nitrile rubber and polyvinyl chloride, and polyurethane. 
     
     
       13. The method of  claim 10  in which said inner layer, said intermediate layer and said outer layer have a Shore A durometer hardness of from about 20 to 90. 
     
     
       14. The method of  claim 10  in which said inner layer has a Shore A durometer hardness of at least about 70. 
     
     
       15. In combination, a replaceable sleeve and carrier, said sleeve comprising: 
       a) an inner polymeric layer;  
       b) a reinforcing layer comprised of fibers, said reinforcing layer overlying said inner layer and being adhered directly thereto;  
       c) a substantially void-free intermediate polymeric layer overlying said reinforcing layer and being adhered directly thereto; and  
       d) an outer polymeric layer; wherein said inner polymeric layer has a Shore A hardness which is equal to or greater than the Shore A hardness of said intermediate and outer polymeric layers, said sleeve being mounted on said carrier and being readily separable from said carrier.  
     
     
       16. A replaceable sleeve adapted to be mounted on a carrier comprising: 
       a) an inner polymeric layer comprising a carboxylated nitrile-butadiene copolymer;  
       b) a reinforcing layer comprised of fibers, said reinforcing layer overlying said inner layer and being adhered directly thereto;  
       c) a substantially void-free intermediate polymeric layer overlying said reinforcing layer and being adhered directly thereto; and  
       d) an outer polymeric layer forming a working surface.  
     
     
       17. A replaceable sleeve adapted to be mounted on a carrier comprising: 
         a )  an inner layer;    
         b )  a substantially void - free intermediate polymeric layer overlying said inner layer and being adhered directly thereto;    
         c )  a cushion layer overlying said intermediate polymeric layer and being adhered directly thereto; and    
         d )  an outer polymeric layer forming a working surface; wherein said inner layer has a Shore A hardness which is equal to or greater than the Shore A hardness of said intermediate and outer polymeric layers.