Continuous Inkjet Media Marking for Non-Product Image Removal
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Solution Overview
Problem
Inkjet printing devices using continuous media face challenges in removing jetting state monitoring patterns from user images, leading to confusion during post-processing and increased device cost due to the need for additional image detection systems.
Innovation Solution
An inkjet printing device and method that includes a medium transport mechanism, inkjet heads, processors, and memory to print non-product image position information on continuous media, allowing for the identification of non-product images such as jetting state monitoring patterns, enabling their recognition before post-processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image detection devices are added to detect and remove jetting state monitoring patterns, then the ability to remove non-product images is improved, but device cost increases
Solution Approach 1:
The patent applies preliminary action by printing position information of non-product images (jetting state monitoring patterns, density correction patterns, dummy jet regions) on the continuous medium before the actual user images. This allows the medium transport mechanism to identify and remove non-product images in advance, eliminating the need for expensive image detection devices after printing.
Solution Approach 2:
The patent introduces an intermediary approach by using position information as a mediator between the non-product images and the medium transport mechanism. Instead of directly detecting non-product images through complex image analysis, the system uses printed position information as a marker that guides the removal process, simplifying the overall system.
2Reliability
If jetting state monitoring patterns are printed on continuous medium, then inkjet head maintenance is enabled, but confusion with user images occurs during post-processing
Solution Approach 1:
The patent applies segmentation by dividing the continuous medium into distinct regions: non-product image regions (containing jetting state monitoring patterns, density correction patterns, dummy jet regions) and user image regions. The medium transport mechanism uses this segmentation to identify and remove non-product images separately from user images, maintaining both maintenance capability and post-processing efficiency.
Solution Approach 2:
The patent uses preliminary action by printing position information of non-product images before user images on the continuous medium. This allows the medium transport mechanism to identify and remove non-product images in advance, preventing confusion during post-processing while maintaining the ability to perform inkjet head maintenance through jetting state monitoring patterns.
Data Source
AI summary
Provided are an inkjet printing device and a printing method capable of grasping a position of a non-product image, such as a jetting state monitoring pattern, on a continuous medium. An inkjet printing device includes a medium transport mechanism that transports a continuous medium (12) in a medium transport direction, an inkjet head that prints a user image on the continuous medium, one or more processors, and one or more memories that are connected to the processors and store commands which are able to be executed by using the processors, in which the processor reads out the command from the memory and prints non-product image position information (304) including information on a position of a non-product image (302) printed on the continuous medium in the continuous medium at a position (12A) on a downstream side of a region in which the non-product image is printed in the medium transport direction.