Finishing Device Failure Bypass in Printing Systems
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Solution Overview
Problem
Printing devices often halt operations if the finishing device fails to perform its functions, such as stapling or collating, due to malfunctions like sensor failures or improper positioning, leading to incomplete print jobs and user inconvenience.
Innovation Solution
The printing device includes a controller that detects finishing device failures and redirects print media to a non-finishing bin, allowing the printing process to continue while alerting the user to address the issue, and attempts to reinitialize the finishing device within a threshold of failures before disabling it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printing device stops operations when the finishing device fails, then the printing quality and finishing reliability are maintained, but the productivity and user convenience deteriorate due to incomplete print jobs
Solution Approach 1:
The patent extracts the finishing device from the critical path of the printing process by implementing a bypass mechanism. When the finishing device fails, print media is diverted to a non-finishing bin, separating the finishing function from the essential printing function and allowing printing to continue independently of finishing device status
Solution Approach 2:
The system dynamically changes the output destination parameter based on finishing device status. The controller monitors finishing device health and switches the print media routing parameter between finishing bin and non-finishing bin, enabling adaptive response to device failures while maintaining printing productivity
2Productivity
If the printing device continues operations when the finishing device fails, then the productivity is maintained, but the finishing quality and system reliability deteriorate
Solution Approach 1:
The patent segments the output bin system into two distinct bins: a finishing bin for completed jobs and a non-finishing bin for bypassed jobs. This segmentation allows the system to maintain productivity by routing to the non-finishing bin while clearly distinguishing and isolating the unreliable finishing process from the reliable printing process
3Reliability
If the finishing device is continuously monitored and reinitialized, then the system reliability improves, but the device complexity and operation time increase
Solution Approach 1:
The controller implements periodic monitoring of the finishing device status and attempts reinitialization after detecting failures. This periodic check-and-retry approach restores reliability through systematic recovery attempts while keeping the monitoring logic simple and manageable through standardized intervals
Data Source
AI summary
An example printing device may comprise a first bin to receive print media, where the first bin is a non-finishing bin, a second bin to receive print media, where the second bin is a finishing bin, a finishing device, and a controller to determine a total number of finishing device failures and redirect a print job from the second bin to the first bin in response to a determination that the total number of finishing device failures exceeds a threshold value.