Binder, and binder packet

Abstract

There is provided a binder configured to bind a bound member by being struck out from a binding machine. The binder includes a substantially U-shaped base member that is plastically deformable, and a surface member that is provided on a surface of the base member. There is also provided a coupled binder including plural binders. Each of the binders is coupled to other of the binders on front and back surfaces thereof. The front and back surfaces of each of the binders are not provided with the surface member.

1 . A binder configured to bind a bound member by being struck out from a binding machine, the binder comprising:
 a substantially U-shaped base member that is plastically deformable; and   a surface member that is provided on a surface of the base member.   
     
     
         2 . The binder according to  claim 1 ,
 wherein a friction coefficient between the surface member and the bound member is larger than a friction coefficient between the base member and the bound member.   
     
     
         3 . The binder according to  claim 1 ,
 wherein the surface member has an elastic limit higher than that of the base member.   
     
     
         4 . The binder according to  claim 1 ,
 wherein the surface member is provided on a substantially U-shaped inner surface of the base member.   
     
     
         5 . The binder according to  claim 4 ,
 wherein the surface member is provided in a substantially U-shape on the inner surface of the base member.   
     
     
         6 . The binder according to  claim 4 ,
 wherein the base member includes a pair of leg portions and a connection portion connecting the pair of leg portions, and   wherein the surface member is provided at positions facing each other on inner surfaces of the pair of leg portions.   
     
     
         7 . The binder according to  claim 4 ,
 wherein the base member includes a pair of leg portions and a connection portion connecting the pair of leg portions, and   wherein the surface member is provided on an inner surface of the connection portion, and the surface member is not provided at positions facing each other on inner surfaces of the pair of leg portions.   
     
     
         8 . The binder according to  claim 1 ,
 wherein the surface member is provided on a substantially U-shaped outer surface of the base member.   
     
     
         9 . The binder according to  claim 1 ,
 wherein the base member is formed of plastic, and the surface member is formed of rubber.   
     
     
         10 . A coupled binder comprising:
 a plurality of binders coupled to each other, each being the binder according to  claim 1 ,   wherein each of the binders is coupled to other of the binders on front and back surfaces thereof, and   wherein the front and back surfaces of each of the binders are not provided with the surface member.