Patent ID: 8342992

Claim:
A drive transmission apparatus for transmitting a driving force to a rotatable member, said drive transmission apparatus comprising: a driving source; a drive pulley configured to receive a driving force from said driving source; a driven pulley; a belt, extending around said drive pulley and said driven pulley, configured to transmit the driving force from said drive pulley to said driven pulley; a driving gear configured to receive a driving force from said driving source; a driven gear configured to receive the driving force of said driving gear; a drive transmitting shaft, provided with said driven pulley and said driven gear, configured to transmit the driving force to said rotatable member; and a one-way clutch, provided between said driven gear and said drive transmitting shaft, configured to transmit the driving force in a rotational direction from said driven gear to said drive transmitting shaft when an angular speed of said driven pulley is lower than an angular speed of said driven gear.