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US 8,009,999 B2Granted
Image forming apparatus and image forming method
AssigneeRicoh Company, Ltd.
InventorToshiaki Takane
Life of this patent
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AssigneeRicoh Company, Ltd.
InventorToshiaki Takane
Estimating the term…
A tandem-type image forming apparatus includes a toner mark pattern forming unit configured to form a toner mark pattern; a sensor configured to detect the toner mark pattern; a first determining unit configured to determine presence or absence of color misregistration based on the detected result; and a color misregistration correcting unit configured to correct the color misregistration based on the determined result. The toner mark pattern includes paired toner marks disposed at different coordinates in the sub-scanning direction. One of the paired toner marks has their ends at different coordinates in the main scanning direction with respect to those of the other one. The first determining unit determines the presence or absence of the color misregistration in the main scanning direction based on the result of the detection of the paired toner marks.
A tandem-type image forming apparatus comprising:
An image forming method comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Details of unit: for exposing
Of a toner pattern, e.g. a powder pattern , e.g. magnetic transfer: using at least one intermediate support
Using at least one intermediate support: with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent
Colour registration: generation of registration marks
About 3 years 5 months of term left · ends 29 Mar 2030 (estimated)
1. Field of the Invention
The present invention relates to an image forming apparatus and an image forming method.
2. Description of the Related Art
FIG. 1 is a block diagram showing a schematic hardware configuration of an image forming apparatus of an embodiment of the present invention;
FIG. 2 is a side view showing an internal structure of a tandem-type full color printer which uses an electrophotographic process;
FIG. 3 is a functional block diagram related to color misregistration correction control of the image forming apparatus according to the embodiment;
An embodiment that describes the best mode for carrying out the present invention is explained next with reference to the drawings.
An image forming apparatus according to an embodiment of the present invention serves various image forming functions and has a functional configuration, for example, as shown in FIG. 1. FIG. 1 is a block diagram showing a schematic hardware configuration of the image forming apparatus of the present embodiment.
The image forming apparatus of FIG. 1 includes photoreceptors 101-104, a transfer belt 105, a TM sensor 106, a system control unit 107, a ROM 108, a nonvolatile RAM 109, and an LD write circuit 110.