Printer Maintenance Staggering via Unique ID
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Solution Overview
Problem
Multiple printers in retail stores and businesses often perform nozzle maintenance simultaneously, leading to a synchronized downtime where all printers become unavailable for printing, and there is a high risk of running out of ink due to the ink-intensive high-power cleaning operation being executed at the same time.
Innovation Solution
A printing device with a maintenance processor that adjusts the reference period for nozzle maintenance based on a unique identifier, such as a serial number, to stagger the timing of maintenance operations among multiple printers, ensuring that each printer executes maintenance at a different time and preventing simultaneous downtime and ink depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all printers execute nozzle maintenance at a regular interval, then each printer maintains its nozzles properly, but all printers become unavailable for printing simultaneously and may run out of ink at the same time
Solution Approach 1:
The patent implements periodic nozzle maintenance operations with different time intervals for different printers. Each printer executes maintenance at staggered intervals (e.g., Printer A every 400 days, Printer B every 405 days) based on their unique identifiers, ensuring that maintenance occurs regularly for each device while preventing simultaneous execution across the fleet, thus maintaining both reliability and productivity
Solution Approach 2:
The patent segments the maintenance schedule by dividing the printer fleet into different groups with distinct maintenance intervals. Each printer is assigned a unique maintenance period calculated from its serial number, creating segmented maintenance waves rather than a unified schedule, which allows continuous printing capability while maintaining nozzle health
2Reliability
If nozzle maintenance is executed frequently, then nozzle performance is maintained, but ink consumption increases significantly
Solution Approach 1:
The patent establishes periodic maintenance intervals (e.g., every 400 days) that balance nozzle performance requirements with ink conservation. By spacing maintenance operations appropriately and avoiding unnecessary frequent executions, the system maintains reliable nozzle function while minimizing ink loss from cleaning operations
Data Source
AI summary
A printing device is configured to be used simultaneously with other printing devices and includes: a print unit configured to print by ejecting ink from nozzles; a timekeeping unit configured to keep time; a storage configured to store a reference period for executing a nozzle maintenance operation, the reference period being initially set at an initial reference period; and a maintenance processor configured to: execute a nozzle maintenance operation each time the reference period passes based on the time kept by the timekeeping unit, change the reference period stored in the storage from the initial reference period to a changed reference period such that a timing of the nozzle maintenance operation differs from a timing of the nozzle maintenance operation of at least one of the other printing devices, and execute the nozzle maintenance operation after the changed reference period passes.