Image forming apparatus

摘要

An image forming apparatus includes an image forming unit, a sheet conveying unit, a TOD (Top of Data) control module for instructing the image forming unit to start generation of a toner image, a timing roller driving module for instructing the sheet conveying unit to start driving of the timing roller, an image synchronization module designed depending on the sheet conveying unit and the image forming unit, and a sheet information module for generating an image synchronization identifier for designating a pattern of image synchronization control related to printing of the toner image on the sheet, depending on a type of the sheet designated. The image synchronization module is activated when the formation of the toner image on the sheet has become possible, and activate each of the TOD control module and the timing roller driving module, with a relative time lag based on the image synchronization identifier.

主权项

1. An image forming apparatus comprising:
an image forming unit configured to form a toner image based on an input image; a sheet conveying unit configured to convey a sheet by driving a timing roller; a TOD (Top of Data) control module configured to instruct said image forming unit to start generating the toner image; a timing roller driving module configured to instruct said sheet conveying unit to start driving of said timing roller; an image synchronization module for activating said TOD control module and said timing roller driving module, on a basis of a physical positional relation of said sheet conveying unit and said image forming unit; and a sheet information module configured to generate an image synchronization identifier for designating a pattern of image synchronization control related to printing of the toner image on the sheet, depending on a type of the sheet designated, wherein said image synchronization module is configured to
be activated when formation of the toner image on the sheet has become possible, and activate each of said TOD control module and said timing roller driving module, with a relative time lag based on said image synchronization identifier, andswitch, based on said image synchronization identifier, between (i) a first mode, in which a driving start signal is generated for instructing start of driving said timing roller-from said timing roller driving module after an image synchronization signal is generated from said TOD control module for instructing start of generation of the toner image, and (ii) a second mode, in which said image synchronization signal is generated from said TOD control module after said driving start signal is generated from said timing roller driving module.