Patent ID: 8811874

Claim:
A belt device comprising: an endless belt formed into a loop rotatable in a predetermined direction of rotation; and a flange assembly disposed at each lateral end of the endless belt in an axial direction thereof to support the endless belt, the flange assembly including: a flange having a substantially circular flange face facing a circumferential edge of the endless belt; a tube projecting from the flange face of the flange and inserted into the loop formed by the endless belt at each lateral end of the endless belt in the axial direction thereof; a groove mounted on an outer circumferential surface of the tube along a circumferential direction thereof; and a slip ring slidably contacting the groove and including: a through-hole contacting the groove; and an inner disk face separatably contacting the circumferential edge of the endless belt, wherein ID 51 <OD 50 a <OD 21 <OD 51 where ID 51 is an inner diameter of the slip ring through a rotation axis of the slip ring, OD 50 a is a minimum outer diameter of the tube through the rotation axis of the slip ring, OD 21 is a maximum outer diameter of a track of the endless belt rotating in the predetermined direction of rotation through the rotation axis of the slip ring, and OD 51 is an outer diameter of the slip ring through the rotation axis of the slip ring.