Patent ID: 8028986

Claim:
A printer, comprising: a switch gear comprising a switch spur gear and being slidable along a direction that is parallel to a rotation axis of the switch spur gear; a first driven gear comprising a first spur gear and a cylinder fixed to the first spur gear, the cylinder being concentric with respect to the first spur gear and extending along said direction, the first driven gear engaging with a first mechanism; a second driven gear comprising a second spur gear with a hole that is concentric with respect to the second spur gear and extends along said direction, the second driven gear engaging with a second mechanism different from the first mechanism; a sliding power source which generates a power for sliding the switch gear; a slide mechanism configured to receive the power for sliding the switch gear generated by the sliding power source and to slide the switch gear along said direction; and a first tray for storing sheets, wherein the second driven gear is mounted on the first driven gear by inserting the cylinder of the first driven gear into the hole of the second driven gear and is rotatable with respect to the first driven gear around the cylinder, the slide mechanism slides the switch gear between a first position where teeth of the switch gear engage with teeth of the first spur gear and a second position where the teeth of the switch gear engage with teeth of the second spur gear along said direction, and the first mechanism is configured to feed the sheets from the first tray by receiving a first drive power transmitted via the first driven gear.