Transport Roller Path Protrusion for Multi-Feed Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The transport capability of transport rollers in existing transport devices is insufficient due to the configuration where the entire first and second transport path surfaces are disposed on the nip section side of the nip line, leading to inadequate pressing of the transport target material against the transport roller.
Innovation Solution
The transport device includes a transport roller, a nip section, a first transport path surface protruding toward the transport roller side beyond the nip line upstream, and a second transport path surface protruding toward the transport roller side beyond the nip line downstream, ensuring a larger contact area with the transport roller and improved transport capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the entire first transport path surface and the entire second transport path surface are disposed on the nip section side of the nip line, then the structure is simplified, but the transport capability of the transport roller becomes insufficient
Solution Approach 1:
The patent applies local quality by making different portions of the transport path surfaces protrude beyond the nip line. Specifically, the first transport path surface has a first top portion that protrudes beyond the nip line upstream, and the second transport path surface has a second top portion that protrudes beyond the nip line downstream. This localized protrusion creates specific contact points with the transport roller, improving transport capability without requiring the entire surfaces to be repositioned, thus maintaining structural simplicity while enhancing reliability.
2Reliability
If the transport path surfaces are configured to protrude beyond the nip line, then the transport capability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the transport path surfaces into distinct functional portions. The first transport path surface is divided into a first top portion that protrudes beyond the nip line and other portions that remain in conventional position. Similarly, the second transport path surface is divided into a second top portion that protrudes beyond the nip line. This segmentation allows the protruding portions to enhance transport capability through direct contact with the transport roller, while the non-protruding portions maintain the original simplified structure, thus balancing reliability improvement with device complexity management.
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
This configuration enhances the transport force transmission to the recording medium, improving the transport capability of the transport roller and preventing transport failures, thereby ensuring reliable material handling.
Implementation Method 1
a transport roller (for example, feed roller) that transports a transport target material sent from an accommodating unit
Implementation Method 2
a nip section (for example, retard roller) that sandwiches the transport target material with the transport roller and prevents multi-feed of the transport target material
Data Source
AI summary
A transport device includes a transport roller, a nip section, and first and second transport path surfaces. The transport roller transports a transport target material sent from an accommodating unit. The nip section nips the transport target material with the transport roller, and prevents multi-feed of the transport target material. The first transport path surface is disposed upstream of the nip section in a transport direction to face a transport roller side of the nip section. The first transport path surface includes a top portion protruding toward the transport roller side beyond a nip line between the transport roller and the nip section. The second transport path surface is disposed downstream of the nip section in the transport direction to face the transport roller side of the nip section. The second transport path surface includes a top portion protruding toward the transport roller side beyond the nip line.