File holding device having stronger and lighter cover

Abstract

A file holding device includes a cover device having an intermediate layer made of foamable materials, and two outer layers secured onto the two opposite outer sides of the intermediate layer, for solidly retaining the intermediate layer between the outer layers. The intermediate layer may be made of the lighter foamable materials, and the outer layers may be made of stronger plastic or synthetic materials for solidly retaining the intermediate layer between the outer layers, and for forming the stronger but lighter cover device.

I claim:  
     
         1 . A file holding device comprising: 
 a cover device including: 
 a) an intermediate layer made of foamable materials, and having two opposite outer sides, and  
 b) two outer layers attached onto said outer sides of said intermediate layer, for retaining said intermediate layer between said outer layers.  
   
     
     
         2 . The file holding device according to  claim 1 , wherein said intermediate layer includes a thickness greater than that of said outer layers.  
     
     
         3 . The file holding device according to  claim 1 , wherein said cover device includes at least one clip attached thereto.  
     
     
         4 . The file holding device according to  claim 1 , wherein said intermediate layer and said outer layers include an outer peripheral portion, said cover device includes an outer peripheral casing engaged onto said outer peripheral portion of said intermediate layer and said outer layers, for solidly securing and retaining said intermediate layer and said outer layers together.