Patent ID: 7976018

Claim:
A discharged sheet monitoring mechanism for a printer, comprising: a paper receiving tray configured to receive and stack discharged printed sheets thereon; a stack amount detector configured to detect a stack amount of discharged sheets stacked on the paper receiving tray; a remaining amount calculator configured to calculate a remaining amount based on the stack amount detected by the stack amount detector, the remaining amount being a difference in amount between the stack amount and a maximum stacking amount of the paper receiving tray; a sheet type acquisition unit configured to acquire a type of a sheet to be printed; a dischargeable sheet amount calculator configured to calculate a dischargeable number of sheets further stackable on the paper receiving tray until the paper receiving tray is full therewith based on the remaining amount calculated by the remaining amount calculator and the sheet type acquired by the sheet type acquisition unit; and a notification unit configured to notify a user of the dischargeable number of sheets calculated by the dischargeable sheet amount calculator.