Patent ID: 7415223

Claim:
A color laser printer comprising: a main frame casing formed with a first opening and a second opening; a first door configured to cover the first opening; a second door configured to cover the second opening; a plurality of drum cartridges provided in the main frame casing in a substantially vertical arrangement, each of the plurality of drum cartridges being removable from the main frame casing and comprising a photosensitive drum; a plurality of developing cartridges provided in the mainframe casing, each of the plurality of developing cartridges being removable from the main frame casing and comprising a toner housing part, configured to accommodate a toner; a scanner unit; a fixing part configured to fix the toner on a recording medium; and a belt disposed on the first door; wherein each of the plurality of drum cartridges is installable to and removable from the main frame casing through the first opening when the first door is open; and wherein each of the plurality of developing cartridges is installable to and removable from the main frame casing through the second opening when the second door is open.