Medium Transport Gate-Roller Assembly for Precise Skew Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium transport apparatuses fail to precisely correct skew due to improper positioning of route members, leading to misalignment of the medium's leading edge before it contacts the shutter member, which can result in inaccurate skew correction.
Innovation Solution
A medium transport apparatus with a gate switchable between states, positioned on a rotating member, and route members fixed to a common rotating shaft, ensuring accurate alignment of the medium's leading edge with the gate, preventing premature contact with transport rollers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the leading edge of the medium comes into contact with route members before the gate, then the leading edge becomes misaligned from the gate, but the medium can be transported through the system
Solution Approach 1:
The gate is merged with the rotating member that carries the first roller, forming an integrated assembly where the gate and roller share a common rotational axis. This integration ensures that the gate and route members maintain fixed positional relationships, preventing premature contact between the medium's leading edge and route members while preserving skew correction functionality.
Solution Approach 2:
The gate is positioned upstream of the nip location between transport rollers, allowing it to make preliminary contact with the leading edge of the medium before the transport rollers engage. This preliminary action by the gate aligns the leading edge properly, preventing misalignment that would occur if route members contacted the medium first.
2Manufacturing precision
If the gate is positioned upstream of the nip location, then the leading edge can be aligned properly, but the gate may interfere with medium transport
Solution Approach 1:
The gate is made rotatable along with the rotating member, allowing it to dynamically adjust its position relative to the medium during transport. The gate can rotate into contact with the leading edge for alignment, then rotate away to clear the transport path, eliminating static interference while maintaining alignment capability.
Solution Approach 2:
The gate performs preliminary alignment action on the leading edge upstream of the nip location, then moves out of the way before the medium reaches the transport rollers. This timing-based preliminary action ensures alignment is achieved without sustained interference with the transport process.
Data Source
AI summary
A medium transport apparatus includes: a first and second route members that constitute a medium transport route; a transport roller pair that nips and feeds a medium being transported between the first and second route members and includes a first and second rollers that nip the medium therebetween; and a gate switchable between a first and second states. In the first state, the gate closes the medium transport route at a location upstream, in a medium transport direction, of a nip location at which the transport roller pair nips the medium. In the second state, the gate opens the medium transport route. The gate is disposed on a rotating member rotatable around a first rotating shaft, which is a rotating shaft for the first roller. The first rotating shaft engages with a fixed member, which is fixed to both the first route member and the second route member.