Paper feeding roller for a shredder

Abstract

Provided is a paper-feed roller including a rotatable roller shaft, a rotatable roller member coupled to the roller shaft, a friction-feed member on an outer circumference of the roller member, and a feed protrusion coupled to the roller member, the feed protrusion protruding a predetermined amount from the friction-feed member.

1 . A paper-feed roller comprising:
 a rotatable roller shaft;   a rotatable roller member coupled to the roller shaft;   a friction-feed member on an outer circumference of the roller member; and   a feed protrusion coupled to the roller member, the feed protrusion protruding a predetermined amount from the friction-feed member.   
     
     
         2 . The paper-feed roller according to  claim 1 , wherein the roller shaft has a polygonal section. 
     
     
         3 . The paper-feed roller according to  claim 1 , wherein the roller member comprises a first and second roller members and the feed protrusion is disposed between the first and second roller members. 
     
     
         4 . The paper-feed roller according to  claim 3 , wherein the first and second roller members comprise a guide protrusion and a guide hole receiving the guide protrusion, respectively. 
     
     
         5 . The paper-feed roller according to  claim 1 , wherein the feed protrusion protrudes from 0.5 mm to 2.0 mm from the friction-feed member. 
     
     
         6 . The paper-feed roller according to  claim 1 , wherein the friction-feed member is formed of rubber. 
     
     
         7 . The paper-feed roller according to  claim 1 , wherein the friction-feed member comprises a plurality of protrusions protruding a predetermined amount. 
     
     
         8 . The paper-feed roller according to  claim 7 , wherein the protrusions protrude from 0.1 mm to 0.5 mm from the friction-feed member. 
     
     
         9 . The paper-feed roller according to  claim 7 , wherein the protrusions are spaced apart from each other on the friction-feed member. 
     
     
         10 . A paper-feed roller comprising:
 a rotatable roller shaft;   a plurality of rotatable roller members coupled to the roller shall;   a friction-feed member on an outer circumference of at least one of the roller members; and   a feed protrusion coupled to at least one of the roller members.   
     
     
         11 . The paper-feed roller according to  claim 10 , wherein the feed protrusion protrudes from 0.5 mm to 2.0 mm from the friction-feed member. 
     
     
         12 . The paper-feed roller according to  claim 10 , wherein the friction-feed member comprises a plurality of protrusions. 
     
     
         13 . The paper-feed roller according to  claim 12 , wherein the protrusions protrude from 0.1 mm to 0.5 mm from the friction-feed member.