Patent ID: 9651893
Date: 2017-05-16
CPC Classifications: G03G

Claim:
1. An image forming apparatus comprising: a display which displays information; a development device which supplies toner to develop an electrostatic latent image formed on a photosensitive drum; a toner container which stores the toner supplied to the development device and to which a memory is attached that data indicating whether the toner container is an installation toner container or a replacement toner container and a value of a remaining amount related item which is an item related to a remaining amount of the toner are written in; a supply portion which supplies the toner stored in the toner container to the development device; a read/write portion which reads contents stored in the memory attached to the toner container and which writes information in the memory; and a control portion in which the read/write portion is made to perform update process where a present value of the remaining amount related item is gradually reduced, according to a number of sheets printed, from an initial value of the remaining amount related item, the present value is recognized based on the reading of the read/write portion, when a predetermined installation performance condition is satisfied, the supply portion is made to perform installation where the toner is put into the development device containing no toner, when the installation is performed in a state where the installation toner container is attached, a value based on the remaining amount of the toner within the container after the installation is stored as the initial value in the memory and when the installation toner container is attached in a state where the installation has already been performed, a value based on the remaining amount of the toner within the container before the installation is stored as the initial value in the memory.