Bookbinding Apparatus Toner Adhesive Force via Localized Light Exposure
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Solution Overview
Problem
Existing bookbinding apparatuses using toner as an adhesive face challenges in achieving sufficient adhesive force due to insufficient laser beam irradiation in the adhesive area, leading to inadequate bonding between sheets.
Innovation Solution
The apparatus includes a photosensitive member, a light source that forms distinct electrostatic latent images for the image and adhesive areas, with the light source emitting a higher intensity of light for the adhesive area, and an optical system that optimizes light propagation to ensure maximum toner application at the adhesive area, enhancing the adhesive force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the amount of toner applied to the adhesive area is increased to improve bonding performance, then the adhesive force between sheets is improved, but the optical system cannot deliver sufficient laser beam intensity to the adhesive area due to propagation efficiency limitations, preventing adequate toner application
Solution Approach 1:
The patent applies different exposure amounts to different areas of the photosensitive member. Specifically, the adhesive area receives a larger exposure amount than the image area, creating local optimization of toner application. This is achieved by controlling the laser beam intensity distribution through the optical system to ensure the adhesive area receives sufficient light despite propagation efficiency limitations.
Solution Approach 2:
The patent changes the exposure amount parameter in the adhesive area to be larger than in the image area. This parameter change compensates for the optical system's propagation efficiency losses and ensures adequate toner application in the adhesive area, thereby achieving sufficient bonding strength.
2Manufacturing precision
If the laser beam intensity is increased to ensure sufficient irradiation of the adhesive area, then the toner application in the adhesive area is improved, but the optical system's propagation efficiency causes uneven light distribution across the photosensitive member surface
Solution Approach 1:
The patent creates different exposure conditions for different regions of the photosensitive member. The adhesive area is specifically targeted with higher exposure amounts to compensate for optical propagation losses, while the image area maintains standard exposure. This local differentiation achieves uniform toner application in the adhesive area without requiring complex overall system redesign.
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 a stronger adhesive force between sheets, improving the bonding process and resulting in a more robust bookbinding.
Implementation Method 1
a light source that forms a first electrostatic latent image corresponding to an original area and a second electrostatic latent image corresponding to an adhesive area by irradiating the photosensitive member with light
Implementation Method 2
a developing member that forms a first toner image and a second toner image by developing the first electrostatic latent image and the second electrostatic latent image using toner
Data Source
AI summary
A light source includes a light emitting element, and an optical system that directs light output from the light emitting element to a surface of a photosensitive member. An irradiation amount of light for forming a second electrostatic latent image is larger than an irradiation amount of light for forming a first electrostatic latent image. A position at which a propagation efficiency of light peaks in a scanning direction of the light is located between a center of an image height of the optical system and a surface area in which the second electrostatic latent image is formed out of the surface of the photosensitive member.