Patent ID: 8894071

Claim:
An O-ring for a feed roller comprising: an O-ring body having first and second ends, which are discontinued from each other, wherein coupling surfaces in the first and second ends are capable of being coupled to each other while opposing each other in a complementary fashion; and a fastening unit fastening the first and second ends to each other such that the coupling surfaces in the first and second ends form and maintain an overlapped and a coupled state in which coupling surfaces oppose each other in a complementary fashion, wherein the first and second ends of the O-ring body have first and second storage recesses formed in corresponding opposite positions, the first and second storage recesses being engraved on outer circumferential surfaces thereof, and the fastening unit is received in and fitted to the first and second storage recesses, wherein the O-ring body has a plurality of coupling holes in the first and second ends thereof, the coupling holes penetrating portions of the first and second ends that correspond to the first and second storage recesses, and wherein the fastening unit includes first and second fastening members, wherein each of the first and second fastening members is fitted by being received in a corresponding one of the first and second storage recesses, and the first and second fastening members pass through the coupling holes and are locked to each other in a complementary fashion, wherein the first fastening member includes: a first body received in and fitted to the first storage recess, wherein the first body has a plurality of first locking holes formed in positions corresponding to a portion of the coupling holes; and a plurality of first penetrating pins protruding from the first body, wherein the first penetrating pins pass through a remaining portion of the coupling holes and protrude to an opposite side, wherein the second fastening member includes: a second body received in and fitted to the second storage recess, wherein the second body has plurality of second locking holes to which at least one of the first penetrating pins is locked; and a plurality of second penetrating pins protruding from the second body, wherein at least one of the second penetrating pins passes through the coupling holes and is locked to the first locking holes formed in the first body.