In-situ Toner Hopper Refill Sealing Mechanism
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Solution Overview
Problem
Image forming apparatuses face challenges in controlling the airborne contamination of print particles, particularly in environments like offices or homes, due to the unpredictable flow characteristics of small toner or 3D print powder particles, and existing solutions do not effectively manage the replenishment of toner in laser toner cartridges, leading to premature device replacement and increased costs.
Innovation Solution
The image forming apparatus includes a toner replenishment port and an in-situ refillable upper toner hopper system, where an external toner replenishment device supplies toner to the cartridge, and a mechanical toner transport mechanism ensures continuous toner supply, extending the device's life and reducing waste, while an illuminated toner fuel gauge monitors the toner levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If an external toner replenishment device is used to supply toner to the cartridge, then the device's useful life is extended and waste is reduced, but the risk of airborne contamination from print particles increases
Solution Approach 1:
A sealed toner replenishment port acts as an intermediary between the external replenishment device and the toner cartridge interior. The port includes a sealed passage that allows toner to be transferred while maintaining the seal integrity, preventing airborne contamination during the replenishment process. The seal engages with the replenishment device to ensure contamination-free toner supply.
Solution Approach 2:
The toner replenishment function is extracted as a separate sealed subsystem from the main toner cartridge. The replenishment port and its sealing mechanism are designed as distinct components that can receive toner from an external source without compromising the main cartridge's sealed environment, thus extending device life while preventing contamination.
2Productivity
If a mechanical toner transport mechanism is used to ensure continuous toner supply, then printing operations can continue without interruption, but the device complexity increases
Solution Approach 1:
The toner transport mechanism is designed to be automatically activated by the printer's existing operational cycles. The toner is transported from the sealed hopper to the development unit using the printer's normal developing roller rotation and airflow patterns, eliminating the need for separate motors or complex control systems. The system self-regulates based on toner level detection and printing activity.
3Volume of moving object
If larger toner reservoirs are implemented in a smaller form factor, then cost savings are achieved and device compactness is improved, but the toner level monitoring precision must be enhanced
Solution Approach 1:
An optical sensor system provides continuous feedback on toner levels within the sealed hopper. The sensor detects toner quantity by measuring light transmission or reflection through the transparent or translucent hopper wall, providing real-time data to the printer's control system. This enables precise monitoring of toner levels in the compact reservoir, triggering replenishment notifications at optimal intervals.
Data Source
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AI summary
An image forming apparatus and method for determining a toner level and providing a notification are provided. The method of operating an image forming apparatus includes counting a number of times a lower toner hopper receives toner from an in-situ refillable upper toner hopper, calculating an estimate of toner volume transferred from the lower toner hopper to a surface of a photosensitive drum, determining an amount of toner consumed from the in-situ refillable upper toner hopper based on the number of times the lower toner hopper receives toner from the in-situ refillable upper toner hopper and the estimate of toner volume transferred from the lower toner hopper to the surface of the photosensitive drum, and generating an upper toner hopper refill notification when the amount of toner consumed from the in-situ refillable upper toner hopper is determined to exceed a threshold value.