Compact Image Forming Apparatus Conveying Path
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Solution Overview
Problem
Conventional image forming apparatuses for double-side printing require a larger vertical space due to the horizontal extension of the conveying path and photosensitive drum, making them bulky.
Innovation Solution
The conveying path is modified to include a downward slope portion that forms a triangular space above it, allowing the process cartridge to be positioned within this space, thereby reducing the vertical height of the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the conveying path extends substantially horizontally to accommodate the photosensitive drum, then the image forming function is achieved, but the vertical height of the apparatus increases
Solution Approach 1:
The patent transforms the conventional horizontal conveying path into a three-dimensional configuration by introducing upward and downward slope portions. The conveying path now ascends from the sheet feeding tray, turns at an upper end, descends to the photosensitive drum, and creates a vertical layering effect. This dimensional transformation allows the process cartridge to be positioned in the vertical space above the downward slope portion, significantly reducing the apparatus's horizontal footprint while maintaining all necessary image forming functions
2Ease of operation
If the process cartridge is positioned above the horizontal conveying path, then the image forming unit is accessible, but the apparatus becomes larger in vertical direction
Solution Approach 1:
The patent implements a nested spatial arrangement where the process cartridge is positioned within the triangular space formed by the upward slope portion, horizontal portion, and downward slope portion of the conveying path. This nesting allows the process cartridge to utilize the vertical space created by the inclined conveying path rather than extending the apparatus vertically. The process cartridge remains easily accessible while the apparatus maintains a compact vertical profile
Data Source
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AI summary
An image forming apparatus is provided. The image forming apparatus includes: a conveying path that includes a first U shape portion; a registration roller; and a inverting path including a second U shape portion joining with an upstream position of the registration roller. The conveying path includes a downward slope portion that runs obliquely down from a topmost position of the first U shape portion toward a nipping position of the registration roller; and wherein the topmost position, a joining position in which the conveying path is connected to the inverting path and the nipping position get lower, in this order, in a vertical direction.