US 9,811,039 B2
Image forming apparatus using pressing plate and computer-readable medium storing instructions to control movement of pressing plate
Takashi Suzuki, Aichi (JP); and Masahito Saeki, Aichi (JP)
Assigned to Brother Kogyo Kabushiki Kaisha, Nagoya, Aichi (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya, Aichi (JP)
Filed on Mar. 25, 2016, as Appl. No. 15/80,665.
Claims priority of application No. 2015-067106 (JP), filed on Mar. 27, 2015.
Prior Publication US 2016/0282778 A1, Sep. 29, 2016
Int. Cl. G03G 15/00 (2006.01); G03G 15/20 (2006.01)
CPC G03G 15/6502 (2013.01) [G03G 15/65 (2013.01); G03G 15/2039 (2013.01); G03G 2215/00383 (2013.01); G03G 2215/00603 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electrophotographic image forming apparatus comprising:
a motor;
an image forming device configured to form an image on a printing sheet, the image forming device using a driving force transmitted from the motor;
a fixing device configure to fix the image formed on the printing sheet;
a tray configured to accommodate multiple printing sheets to be conveyed toward the image forming device, the tray being detachably attached to a main body of the image forming apparatus;
a pressing plate configured to move up, with use of a driving force of the motor, the printing sheets accommodated in the tray to a conveying position;
a storage device; and
a controller,
wherein the motor is configured to operable in a first mode in which the motor rotates at a first speed and a second mode in which the motor rotate at a second speed which is slower than the first speed,
wherein the controller is configured to execute:
a storing process in which the controller stores a rotation amount of the motor since the tray is attached to the main body as a stored rotation amount;
a moving process in which the controller moves, in response to receipt of a print instruction, the pressing plate by driving the motor such that:
the controller drives the motor in the first mode when a remaining rotation amount is equal to or larger than a particular threshold rotation amount, the remaining rotation amount being a difference between a target rotation amount, which is a rotation amount necessary to move the pressing plate from a position when the tray is attached to the main body to the conveying position, and the stored rotation amount, which is stored in the storage device; and
the controller drives the motor in the second mode when the remaining rotation amount is less than the particular threshold rotation amount.