Image forming device and process cartridge therefor

An image forming device, comprising:

• a housing formed with an opening;
• a cover configured to move between a closing position at which the cover closes the opening and an opening position at which the cover exposes the opening;
• a first process cartridge comprising:
• a first photosensitive drum configured to rotate about a drum axis extending in a first direction;
• a first developing device configured to supply toner to the first photosensitive drum;
• and
• a first supply port through which the toner to be supplied to the first developing device is provided;
• and
• a second process cartridge comprising:
• a second photosensitive drum configured to rotate about a drum axis extending in the first direction;
• a second developing device configured to supply toner to the second photosensitive drum;
• and
• a second supply port through which the toner to be supplied to the second developing device is provided,
• wherein the first process cartridge and the second process cartridge are attachable to and detachable from the housing through the opening when the cover is in the opening position, and not attachable or detachable from the housing when the cover is in the closing position.