Printing System Extension Unit Feed Roller Horizontal Overlap
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Solution Overview
Problem
Ink jet printers face challenges in transporting media of varying sizes due to increased transport route lengths and misalignment of transport members, leading to inefficient paper handling and liquid supply systems.
Innovation Solution
The printing system incorporates an extension unit with a feed roller positioned to overlap the storage unit horizontally, allowing for a more compact transport route and efficient paper feeding mechanism, including a pickup roller, retard roller, and separation roller, which enables reliable transportation of media of any size and prolonged print operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the supply cassette is disposed below the liquid storage unit, then the paper sheet transport route must extend around the liquid storage unit, but this increases the transport route length and causes misalignment of transport members
Solution Approach 1:
The feed roller is positioned to overlap the liquid storage unit in the horizontal direction rather than being arranged sequentially below it. This spatial reconfiguration in the horizontal dimension allows the transport route to pass directly between the feed roller and printing unit without extending around the liquid storage unit, thereby shortening the transport path while maintaining proper member alignment
Solution Approach 2:
The space overlapping the liquid storage unit in the horizontal direction is utilized for positioning the feed roller, allowing this region to serve dual purposes: the liquid storage unit occupies the vertical space while the feed roller occupies the horizontal overlap region. This multi-functional use of space resolves the layout conflict without compromising transport reliability
2Adaptability or versatility
If transport members are arranged away from one another along an extended transport route, then the layout can accommodate the liquid storage unit, but the transport members fail to appropriately transport paper sheets of various sizes
Solution Approach 1:
By repositioning the feed roller to overlap the liquid storage unit horizontally, the transport route is reconfigured to maintain compact spacing between transport members. This ensures consistent paper handling across different media sizes while still accommodating the liquid storage unit in the vertical dimension
Solution Approach 2:
The feed roller is specifically positioned in the horizontal overlap region with the liquid storage unit, creating a localized optimal transport path. This local optimization ensures that paper sheets of various sizes are handled appropriately while the overall system maintains versatility through the compact layout
3Volume of stationary object
If the feed roller is positioned far from the printing unit, then the liquid storage unit can be accommodated, but the transport route length increases and transport reliability decreases
Solution Approach 1:
The feed roller is positioned in the horizontal direction to overlap the liquid storage unit, rather than being placed vertically below or far from it. This dimensional shift allows the feed roller to be close to the printing unit while the liquid storage unit occupies the vertical space, thereby maintaining short transport distance and high reliability while accommodating the liquid storage volume
Data Source
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AI summary
The invention provides a printing system and an extension unit that can transport media of any specified sizes appropriately.