Patent ID: 9650220
Date: 2017-05-16
CPC Classifications: B65H,H04N

Claim:
1. A sheet feeding apparatus comprising: a stacking member on which a sheet is stacked, wherein the stacking member moves according to an amount of sheets stacked thereon; a first optical sensor including a light-emitting unit and a light-receiving unit; a detected member which can interrupt light in a light path of the first optical sensor, wherein the detected member moves from a first position in which light in the light path of the first optical sensor is not interrupted, then once interrupts light in the light path of the first optical sensor, and then moves to a second position in which light in the light path of the first optical sensor is not interrupted in this order as an amount of sheets stacked on the stacking member decreases according to movement of the stacking member; a storage unit configured to store information regarding that the detected member is in the first position or information regarding that the detected member is in the second position; and a control unit configured to transmit information regarding an amount of sheets stacked on the stacking member based on information stored in the storage unit, and to change the information stored in the storage unit based on a detection result of the first optical sensor, wherein, in a case where the detected member moves from the first position to the second position, information stored in the storage unit is changed from information regarding that the detected member is in the first position to information regarding that the detected member is in the second position, based on a detection result of the first optical sensor, wherein, in a case where the detected member moves from the second position to the first position, information stored in the storage unit is not changed from the information regarding that the detected member is in the second position to the information regarding that the detected member is in the first position, and wherein second information is information, regarding an amount of sheets stacked on the stacking member transmitted by the control unit, of a case where information stored in the storage unit is information regarding that the detected member is in the second position, first information is information, regarding an amount of sheets stacked on the stacking member transmitted by the control unit, of a case where information stored in the storage unit is information regarding that the detected member is in the first position, and the second information is information notifying that an amount of sheets stacked on the stacking member is less than an amount of sheets stacked on the stacking member indicated by the first information.