Solid Ink Stick Transport System with Optical Sensor
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Solution Overview
Problem
Solid ink printers face challenges in accurately differentiating and transporting ink sticks due to enlarged feed channels, which can lead to incorrect ink sticks being loaded and impaired cooperation with guiding structures, especially as printing demands increase.
Innovation Solution
A system and method that includes a housing with an ink stick support member that moves between positions, a sensor to detect ink sticks, and a controller to operate an actuator, ensuring correct ink stick differentiation and transportation by moving the support member to the appropriate feed channel based on identification signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cross-sectional area of feed channels is increased to supply larger amounts of ink, then productivity increases, but manufacturing precision deteriorates as smaller ink sticks can pass through without engaging keyed plates
Solution Approach 1:
The patent replaces the mechanical keyed plate system with an optical sensing system. Sensors detect the color or identification features of ink sticks to verify correct loading, eliminating reliance on mechanical engagement alone. This allows feed channels to be enlarged for higher productivity while maintaining accurate color differentiation through optical detection.
Solution Approach 2:
The patent introduces sensors as an intermediary between the ink stick and the feeding mechanism. These sensors act as mediators that detect ink stick properties (color, size, shape) and provide feedback to the control system, enabling verification of correct ink stick loading without requiring precise mechanical fit between the keyed plate and ink stick.
2Productivity
If feed channels are enlarged to accommodate higher ink demand, then productivity increases, but reliability deteriorates as ink sticks may not properly cooperate with guiding structures
Solution Approach 1:
The patent implements a feedback mechanism where sensors continuously monitor the presence, position, and characteristics of ink sticks in the feed channel. The control system receives this feedback and can adjust the feeding mechanism or alert the user if an incorrect ink stick is detected, ensuring reliable transport even in enlarged feed channels with reduced mechanical guidance.
Solution Approach 2:
The patent performs preliminary verification of ink stick correctness before the ink stick is fully processed. Sensors detect and verify ink stick properties at the insertion point, allowing the system to prevent incorrect ink sticks from entering the feed channel or to eject them before they can cause transport errors, thereby maintaining reliability despite enlarged channel dimensions.
3Ease of operation
If keyed openings are enlarged to allow ink stick insertion, then ease of operation improves, but manufacturing precision deteriorates as color differentiation becomes less effective
Solution Approach 1:
The patent replaces the mechanical color-differentiation system (keyed openings with unique shapes) with an optical sensing system. Sensors read identification features or detect color properties of ink sticks, allowing keyed openings to be enlarged for easier insertion while maintaining accurate color-specific placement verification through non-mechanical detection methods.
Data Source
AI summary
A solid ink stick transport system has been developed that differentiates between ink sticks inserted into a single insertion port of an inkjet printer. The system includes a solid ink support platform that moves between a position exposed outside of a printer housing to receive solid ink sticks and a position within the housing. The support includes a sensor that enables a controller to identify the solid ink stick before transporting the solid ink stick to an appropriate feed channel.