Developer CRU Cleaning Pad for Laser Aperture Maintenance
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Solution Overview
Problem
Existing xerographic printers face issues with contamination of the raster output scanner's exit window, leading to suboptimal image quality due to unnoticed toner accumulation and contamination during developer cartridge replacement, which results in unnecessary service calls and maintenance costs.
Innovation Solution
A cleaning pad is integrated into the developer customer replacement unit that wipes the laser aperture when inserted or removed, ensuring the exit window is cleaned simultaneously, eliminating the need for a separate cleaning wand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate automated cleaning system is implemented for the exit window, then cleaning effectiveness is improved, but device complexity and cost increase significantly
Solution Approach 1:
The cleaning pad is integrated into the developer CRU housing, combining the cleaning function with the developer cartridge replacement operation. When the developer CRU is inserted or removed, the cleaning pad automatically contacts and cleans the exit window, eliminating the need for a separate automated cleaning system.
Solution Approach 2:
The cleaning pad is positioned to be automatically deployed or contacted during the normal insertion/removal of the developer CRU by the user. The user's routine maintenance action of replacing the developer cartridge simultaneously performs the cleaning function without requiring additional steps or specialized service intervention.
2Object-affected harmful factors
If field service personnel manually clean the exit window at every service call, then contamination is reduced, but service time and labor costs increase
Solution Approach 1:
The cleaning pad is positioned to clean the exit window in advance during developer CRU replacement, before contamination can significantly degrade image quality. This preliminary cleaning action prevents the need for later service interventions.
Solution Approach 2:
The cleaning function is integrated into the routine developer cartridge replacement operation that customers perform themselves, eliminating the need for service personnel to manually clean the exit window during scheduled service calls.
3Extent of automation
If the cleaning pad is integrated into the developer CRU, then cleaning automation is improved, but the risk of damaging delicate components during CRU handling increases
Solution Approach 1:
The cleaning pad is positioned to contact only the exit window surface at a specific location, rather than requiring broad contact or complex mechanisms. This localized cleaning action reduces the risk of damaging other delicate components during CRU insertion or removal.
Solution Approach 2:
The cleaning pad is made of a flexible, compliant material that can conform to the exit window surface and apply gentle cleaning pressure. This flexibility prevents damage to the glass exit window and surrounding components while effectively removing toner contamination.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution maintains optimal image quality by automatically cleaning the laser aperture during cartridge replacement, reducing service calls and maintenance costs associated with toner contamination.
Implementation Method 1
a cleaning pad (20) made of soft and flexible material is attached to the developer CRU (10) on the leading edge of its insertion end so that the cleaning pad (20) contacts the laser aperture (30) when the developer CRU (10) is inserted into the printer body
Data Source
AI summary
A cleaning pad that is part of a printer developer customer replaceable unit cleans a laser aperture each time the customer replacement unit is removed and/or replaced. The pad is located on an inboard end of the customer replaceable unit such that when inserted into the printer it wipes any accumulated toner from the surface of the laser aperture. Also, in developer units that include a light proof cover that retracts at the time of insertion, the wiper is situated so that it cleans the aperture in the process of retracting.