Aspiration Mechanism Blocking Second Sheet Attraction
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Solution Overview
Problem
Conventional paper feeding apparatuses often result in the second sheet being attracted and transported together with the uppermost sheet due to aspiration, leading to folded paper portions and potential transportation jams.
Innovation Solution
Incorporating a blocking mechanism within the aspiration mechanism that selectively blocks air aspiration on the upstream side during the transportation of the uppermost sheet, preventing the second sheet from being attracted and reducing the occurrence of folded paper portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the aspiration mechanism aspirates air to attract the uppermost sheet to the transportation mechanism, then the uppermost sheet is successfully transported, but the second sheet is also attracted and transported together, causing folded paper portions and transportation jams
Solution Approach 1:
The aspiration mechanism is divided into multiple aspiration chambers (first aspiration chamber and second aspiration chamber) that can operate independently. The first aspiration chamber attracts the uppermost sheet while the second aspiration chamber remains inactive or is blocked, preventing the second sheet from being attracted. This segmentation allows selective aspiration of individual sheets without causing multiple sheets to be transported together.
Solution Approach 2:
Different regions of the aspiration mechanism are given different functional properties. The first aspiration chamber has strong aspiration capability for attracting the uppermost sheet, while the second aspiration chamber has reduced or blocked aspiration capability to prevent attracting the second sheet. This local differentiation in aspiration strength ensures that only the intended sheet is attracted while maintaining reliable single-sheet transportation.
2Reliability
If the aspiration force is increased to ensure the uppermost sheet is attracted, then the attraction is more reliable, but the second sheet is more likely to be attracted together, causing folded paper portions
Solution Approach 1:
The aspiration mechanism is segmented into multiple independent aspiration chambers, each capable of being controlled separately. This allows the first aspiration chamber to provide strong aspiration force for reliable attraction of the uppermost sheet, while the second aspiration chamber provides minimal or no aspiration force to prevent the second sheet from being attracted, thereby avoiding folded paper portions.
Solution Approach 2:
The aspiration force is locally differentiated across different chambers. The first aspiration chamber maintains high aspiration pressure for reliable sheet attraction, while the second aspiration chamber has reduced aspiration pressure or is blocked. This local quality variation ensures strong attraction where needed while preventing harmful attraction of subsequent sheets.
3Reliability
If a blocking means is introduced to prevent the second sheet from being attracted, then transportation reliability is improved, but the device complexity increases
Solution Approach 1:
The blocking function is merged with the existing aspiration mechanism structure by incorporating blocking means within the aspiration chambers themselves. Rather than adding a separate blocking system, the blocking capability is integrated into the chambers that already perform aspiration, reducing overall device complexity while maintaining transportation reliability.
Solution Approach 2:
The aspiration chambers serve multiple functions: they provide aspiration force for attracting sheets and simultaneously serve as blocking structures when needed. This multi-functionality reduces the need for separate dedicated blocking components, thereby limiting the increase in device complexity while achieving reliable single-sheet transportation.
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
Effectively prevents the second sheet from being transported with the uppermost sheet, reducing the likelihood of folded paper portions and minimizing transportation jams, thereby improving the reliability and efficiency of the paper feeding process.
Implementation Method 1
an aspiration mechanism that aspirates air to attract the uppermost medium to the transportation mechanism
Implementation Method 2
a blocking means for blocking air aspiration performed by the aspiration mechanism
Data Source
AI summary
A medium supply apparatus includes: a placement mount on which a plurality of media are placed; a transportation mechanism that transports an uppermost medium of the plurality of media placed on the placement mount; and an aspiration mechanism that aspirates air to attract the uppermost medium to the transportation mechanism, wherein the aspiration mechanism includes a blocking means for blocking air aspiration performed by the aspiration mechanism, in such a manner as to prevent another medium of the plurality of media that is located below the uppermost medium from being attracted to the transportation mechanism.