Sliding Dual-Tray Sheet Feeder for Multi-Size Media Handling
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Solution Overview
Problem
Existing image recording devices have limitations in the usability of multiple trays, particularly in efficiently handling and switching between different types of recording sheets during the image recording process.
Innovation Solution
A tray unit comprising a first tray, a second tray, and a cover, where the second tray slides above the first tray and can be positioned to alternate between feeding different types of sheets, and a feeder and recording unit are integrated to manage sheet feeding and image recording, with a discharging unit for handling recorded sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a second tray is added above the main tray to hold different sheet sizes, then the versatility of the image recording device is improved, but the device complexity increases due to the sliding mechanism required to alternate between trays
Solution Approach 1:
The tray system is segmented into a main tray and a second tray that can be independently positioned. The second tray is divided into a tray body and a cover that can move relative to each other, allowing the cover to protect sheets while the tray body slides to alternate between trays for feeding operations.
Solution Approach 2:
The second tray is designed with dynamic positioning capability, sliding between a first position (where the feed roller contacts the tray) and a second position (separated from the feed roller). This dynamic movement allows the system to switch between different sheet sources without requiring complex multi-tray mechanisms.
2Productivity
If the second tray is positioned to allow feed roller contact for sheet feeding, then the productivity is improved, but the sheets become exposed to dust and damage when not in use
Solution Approach 1:
The cover is designed to automatically cover the second tray when it is in the second position (not being fed). This preliminary protective action prevents dust and damage before they can affect the sheets, while allowing quick access when feeding is required by sliding the tray to the first position.
Solution Approach 2:
The cover acts as an intermediary protective element between the sheets and the external environment. It provides a physical barrier that protects sheets from dust and damage while allowing the tray to maintain its feeding functionality when positioned correctly.
3Ease of operation
If clear markings and guide mechanisms are added to the trays, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
Different markings are provided on the main tray and second tray to clearly indicate their respective purposes and the types of sheets they should hold. These visual indicators (such as different colors or symbols) guide users in correctly placing sheets without requiring complex mechanical guidance systems.
Data Source
AI summary
A tray unit includes a first tray, a second tray, and a cover. The first tray includes a first holding surface for holding thereon a first sheet. The second tray includes a second holding surface for holding thereon a second sheet and is configured to slide above and along the first holding surface from a second position to a first position in a first sliding direction and from the first position to the second position in a second sliding direction opposite to the first sliding direction. The cover is configured to cover from above at least a part of the second tray when the second tray is in the second position.