IMAGE FORMING APPARATUS
FIG2 is a block diagram illustrating a control configuration of the image forming apparatus of the first embodiment
A control configuration for controlling functions of the image forming apparatus 1 will be described below with reference to a block diagram in FIG2. In the image forming apparatus 1, a controller 200 of the present embodiment is mounted. The controller 200 is provided with functioning portions including a central processing unit (CPU) 201, a memory 202, an operating portion 203, an image formation control portion 205, a sheet conveyance control portion 206 and others. The CPU 201 realizes various processing to be executed by the image forming apparatus 1 by reading a control program stored in the memory 202. The memory 202 includes a random access memory (RAM) and a read-only memory (ROM) for example and stores programs and data in predetermined storage areas. The operating portion 203 includes devices such as a liquid crystal panel and buttons and accepts operations performed by a user, such as input of information to be used in printing (e.g., size, grammage, surface nature and others of a sheet), and instructions such as execution of printing and of its interruption.
block diagram
150
fixing motor
201
CPU
202
memory
203
operating portion
160
discharge motor
120
pre-registration motor
130
registration motor
206
sheet conveyance control portion
204
computer
110
feed motor
76
duplex sensor
180
duplex motor
205
image formation control portion
200
controller
70
reverse conveyance portion
207
sensor control portion sensor control unit
['1. An image forming apparatus comprising: a first conveyance path (59); an image forming means (10) configured to form an image on a sheet passing through the first conveyance path (59); a first conveyance member (71) configured to receive the sheet from the first conveyance path (59) and convey the sheet to reverse the sheet; a second conveyance path (79) through which the sheet reversed by the first conveyance member (71) is guided to the first conveyance path (59); a first driving source (170) configured to drive the first conveyance member (71); and a controller (200) configured to control the first driving source (170) such that in a case where images are to be formed on a first surface of a preceding sheet, on a first surface of a succeeding sheet fed to the first conveyance path (59) succeeding to the preceding sheet and on a second surface of the preceding sheet, the controller (200) causes the first conveyance member (71) to stop without reversing the preceding sheet (2B in FIG. 10A) in a direction of heading to the second conveyance path (79) in a case where the image has been formed on the first surface of the preceding sheet and permission of preparing the image to be formed on the first surface of the succeeding sheet is not issued yet, and the controller (200) causes the first conveyance member (71) to restart conveyance of the preceding sheet (2B in FIG. 10C) to the second conveyance path (79) based on timing when the image forming means (10) starts preparing the image to be formed on the first surface of the succeeding sheet.']