First Roller Pair Nip Control for Conveyance Load Reduction
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Solution Overview
Problem
In medium processing devices, the lack of coordination between motors driving the roller pair and the conveyance driving roller leads to uneven conveyance loads, which can deteriorate recording or processing accuracy.
Innovation Solution
A medium processing device with a controller that manages the conveyance and processing operations, including a merging path where the medium is processed, and a first roller pair that can switch between a nip state and a nip release state to reduce conveyance load during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the roller pair and conveyance driving roller are rotated by driving different motors, then the conveyance function is achieved, but the conveyance load becomes uneven and recording accuracy deteriorates
Solution Approach 1:
The patent merges the driving functions by coupling the conveyance driving roller and roller pair to a single motor, ensuring coordinated rotation and uniform conveyance load distribution, which eliminates the accuracy deterioration caused by independent motor control
Solution Approach 2:
The patent introduces a motor controller that receives position information from position detectors on both the conveyance driving roller and roller pair, using feedback to synchronize their rotation and maintain coordinated operation throughout the conveyance process
2Ease of operation
If the first roller pair is in nip state during medium processing operation, then conveyance control is improved, but conveyance load increases and processing accuracy deteriorates
Solution Approach 1:
The patent dynamically adjusts the nip state of the first roller pair based on the processing stage: maintaining nip state during conveyance operations for controlled medium movement, and releasing to minimal contact during processing operations to reduce conveyance load and prevent processing accuracy deterioration
Solution Approach 2:
The patent changes the contact force parameter of the first roller pair between nip state (high contact force for conveyance control) and nip release state (minimal contact force during processing), optimizing performance for each operational phase
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
The solution effectively reduces conveyance instability and prevents deterioration of processing accuracy by minimizing the conveyance load during medium processing operations.
Implementation Method 1
a first roller pair arranged on the downstream path... cause the first roller pair to rotate to convey the medium from the merging path toward the downstream path
Implementation Method 2
a second roller arranged on the merging path... rotating the second roller to convey the medium in a state in which the medium is positioned over the merging path and the downstream path
Implementation Method 3
the first roller pair is configured to be set to a nip state during execution of the conveying operation
Data Source
AI summary
A medium processing device includes: a conveying portion configured to convey a medium along a conveyance path; and a medium processing portion. The conveyance path includes: an upstream path; a downstream path; and a merging path including a processing position. The conveying portion includes a first roller pair arranged on the downstream path and a second roller arranged on the merging path. The first roller pair is configured to be set to a nip state during execution of a conveying operation to convey the medium from the merging path toward the downstream path. The first roller pair is configured to be set to a nip release state during execution of a medium processing operation while the medium is positioned at a nip position of the first roller pair.