Powder Adhesive Image Formation Pattern Switching
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Solution Overview
Problem
In electrophotographic processes for forming images with powder adhesives, continuous supply from a single position leads to a decrease in adhesive strength due to uneven distribution, resulting in insufficient bonding in areas with lower adhesive amounts, potentially affecting the quality of final products like bags.
Innovation Solution
An adhesion apparatus that switches between different image formation patterns during conveyance periods to ensure consistent adhesive supply, using a first pattern in one period and a second pattern in a subsequent period to maintain adhesive strength across the sheet width, preventing the photosensitive member from being depleted at a single position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If powder adhesive is continuously supplied from the same position in the direction of the rotation axis of the developing roller, then the supply process is simple and continuous, but the amount of powder adhesive supplied to the photosensitive member gradually decreases, resulting in insufficient adhesive strength
Solution Approach 1:
The patent implements periodic action by alternating between a first conveyance period where powder adhesive is supplied from a first position in the rotation axis direction, and a second conveyance period where powder adhesive is supplied from a second position different from the first position. This periodic switching prevents continuous depletion at a single position while maintaining consistent adhesive strength across all sheets processed during the first conveyance period, thereby resolving the contradiction between continuous supply efficiency and adhesive strength consistency.
2Ease of manufacture
If powder adhesive is continuously supplied from the same position, then the process is simple, but the amount of adhering powder adhesive decreases in the continuous supply section, leading to poor bonding quality
Solution Approach 1:
The patent applies periodic action by switching between different supply positions in alternating conveyance periods. During the first conveyance period, powder adhesive is supplied from the first position; during the second conveyance period, it is supplied from the second position. This periodic switching maintains uniform adhesive distribution across sheets processed in the same period while preventing localized depletion, thus improving manufacturing precision without significantly complicating the overall process.
Solution Approach 2:
The patent implements dynamics by making the powder adhesive supply position variable rather than fixed. The supply position dynamically switches between the first position and second position based on the conveyance period, allowing the system to adapt and maintain optimal adhesive distribution throughout continuous operation, thereby improving manufacturing precision while keeping the process relatively simple.
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 approach ensures consistent adhesive strength along the sheet, preventing defects like adhesive separation or incomplete bonding, allowing for the production of high-quality final products without interruptions, such as bags, by maintaining a sufficient adhesive supply and distribution.
Implementation Method 1
an image forming unit configured to form, through an electrophotographic process, an adhesive image of a powder adhesive on a sheet that is conveyed
Data Source
AI summary
An adhesion apparatus includes: an image forming unit configured to form, through an electrophotographic process, an adhesive image of a powder adhesive on a sheet that is conveyed; and a control unit configured to control the image forming unit to use a first pattern in a first conveyance period, and use a second pattern different from the first pattern in a second conveyance period following the first conveyance period, as a formation pattern in an adhering section corresponding to part of a width direction orthogonal to a conveyance direction of the sheet.