Image Transfer Belt Control for RFID Print Failure Identification
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Solution Overview
Problem
Existing image forming devices struggle to easily and visually distinguish between sheets on which a wireless tag communication process succeeds or fails, complicating the handling of failed processes and requiring cumbersome re-printing operations.
Innovation Solution
The image forming device controls the timing of medium conveyance and bias voltage application based on the outcome of wireless tag communication, ensuring failed processes result in no image transfer, allowing easy visual differentiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sheets on successful and failed tag processes are discharged to different destinations, then it is possible to separate successful and failed sheets, but after sheets are taken out from the discharge destination, it is not possible to visually distinguish between sheets on which the tag process is successful and sheets on which the tag process fails
Solution Approach 1:
The patent applies color marking to visually distinguish sheets with successful tag processes from those with failed processes. A marking unit prints a first mark (e.g., checkmark) on sheets with successful tag processes and a second mark (e.g., cross) on sheets with failed tag processes, enabling immediate visual identification without requiring separate discharge destinations or complex handling procedures.
2Reliability
If an image indicating a writing failure is printed on sheets when writing data to the RFID tag fails, then failed sheets can be identified, but it is a complicated operation and lengthy process if an image different from an original image is required to be printed on the sheet
Solution Approach 1:
The patent implements partial action by printing only minimal failure indication marks (such as a cross symbol) on sheets with failed tag processes, rather than requiring complete re-printing of original images. This approach provides sufficient failure identification while avoiding the time-consuming process of re-printing entire documents, thus reducing loss of time while maintaining reliable failure indication.
3Ease of operation
If the image forming device controls the timing of medium conveyance to prevent image transfer on failed sheets, then visual identification of failed processes is enabled, but the device complexity increases due to coordinated control of conveyance and bias voltage application
Solution Approach 1:
The patent merges the control of medium conveyance timing with the control of bias voltage application in a coordinated manner. The same control unit that manages the conveying mechanism also controls the bias voltage application timing, allowing the system to prevent image transfer on failed sheets through integrated control rather than separate independent control systems, thereby reducing overall device complexity while achieving visual differentiation.
Data Source
AI summary
An image forming device includes a communication device that communicates with a wireless tag, and an image former that forms a developer image on a surface of a photoreceptor via a transfer belt. The image former includes a transferor that transfers the developer image from the transfer belt to a medium, and a transmitter configured to transmit the medium to the transferor. The image forming device includes a controller communicably coupled to the image former. The controller includes a processor that controls an operation of the transmitter. When communication with the wireless tag by the communication device is not ended, the controller controls the transmitter to stop the medium, and after the developer image has been transferred to the transfer belt by the image former and passes a transfer position of the transferor, transmit the medium preventing the developer image on the transfer belt from being transferred to the medium.