Movable Static Elimination Brush for Print Media
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Image forming devices face the challenge of effectively eliminating static electricity from print media while avoiding paper jams, as strong static elimination brushes can block the print medium if brought into contact, leading to jamming issues.
Innovation Solution
The implementation of a static elimination brush that moves between two positions, with a detection unit tracking the print medium's passage to ensure the brush is only in contact during specific phases of the conveyance process, thereby minimizing interference with the medium's flow and enhancing static elimination efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the static elimination brush is strongly brought into contact with the print medium, then the static elimination efficiency is improved, but the front end of the print medium may be blocked causing a paper jam
Solution Approach 1:
The static elimination brush is made movable between a first position (retracted) and a second position (contacting the print medium). The brush is dynamically positioned based on the presence and stage of print medium conveyance, allowing it to contact the medium for static elimination when needed while retracting to avoid blocking the leading edge during feeding.
Solution Approach 2:
A detection unit detects the conveyance of the print medium in advance, and the static elimination brush is positioned appropriately before the print medium reaches it. The control unit moves the brush to the first position before feeding and to the second position during conveyance, preparing the system in advance to prevent paper jams while ensuring static elimination effectiveness.
2Object-affected harmful factors
If the static elimination brush is retracted to avoid blocking the print medium, then paper jams are prevented, but static elimination efficiency decreases
Solution Approach 1:
The static elimination brush operates in periodic cycles: it is in the first position during print medium feeding, moves to the second position during conveyance for static elimination, and returns to the first position after the print medium passes. This periodic action ensures both paper jam prevention and effective static elimination at appropriate times.
Solution Approach 2:
A detection unit provides feedback on the conveyance status of the print medium to the control unit, which then adjusts the brush position accordingly. The feedback mechanism ensures the brush is in the correct position at the correct time, maximizing static elimination efficiency while preventing paper jams through coordinated control.
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 solution effectively eliminates static electricity from the print medium while preventing paper jams by strategically positioning the static elimination brush, ensuring efficient conveyance and reliable image formation.
Implementation Method 1
a static elimination brush 28 that moves between a first position PA and a second position PB... the static elimination brush 28 eliminates static electricity of the printing medium S
Data Source
AI summary
An image forming device includes an image forming unit, a roller unit, a static elimination brush, a moving unit, and a control unit. The static elimination brush eliminates static electricity of the printing medium. The moving unit moves the static elimination brush between a first position that does not intersect a first conveyance path on a downstream side of the roller unit in the conveyance path and a second position that intersects the first conveyance path. The control unit controls the moving unit during the conveyance of the printing medium, positions the static elimination brush at a position different from the second position until a front end of the printing medium passes an intersection position at which the static elimination brush and the first conveyance path intersect if the static elimination brush is positioned at the second position, and moves the static elimination brush to the second position after the front end of the printing medium passes the intersection position until a rear end of the printing medium passes the intersection position.