Dual-Direction Sheet Feeder for Compact Center-Folding and Saddle-Stitching
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Solution Overview
Problem
Conventional sheet processing devices are either too complex and large due to multiple sheet posture changes or insufficient in functionality as they specialize in center-folding, lacking the ability to efficiently combine center-folding with other processes like saddle-stitching, leading to increased size and noise issues.
Innovation Solution
A sheet processing device with a dual-direction feeder system that allows sheets to be fed in either the same direction as the feed-in direction or orthogonal to it, featuring a first sheet processor for non-center-folding processes and a second sheet processor for center-folding, saddle-stitching, and cutting, sharing a common feeding path to simplify the configuration and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a device changes sheet posture three times to perform center-folding and saddle-stitching, then the sheet processing capability is improved, but the device complexity and size increase
Solution Approach 1:
Instead of changing the sheet posture multiple times to achieve center-folding, the patent inverts the approach by forming the fold along the feed-in direction and then changing the feed direction to orthogonal. This reduces the number of posture changes from three to one, simplifying the mechanism while maintaining the same processing capability.
Solution Approach 2:
The patent changes the dimension of the feeding operation by feeding the sheet along the fold direction (orthogonal to the original feed-in direction) after forming the fold. This dimensional change allows the device to achieve center-folding with fewer posture changes, reducing mechanism complexity.
2Volume of stationary object
If a device is specialized for center-folding with orthogonal feed direction, then the device size is reduced, but the functionality is insufficient for multi-purpose use
Solution Approach 1:
The patent designs the sheet processing device to perform multiple functions including center-folding, saddle-stitching, and other sheet processes by arranging processors in different directions. The sheet feeder can switch between first direction (same as feed-in) and second direction (orthogonal), enabling the device to handle various processing modes within a compact size.
Solution Approach 2:
The patent introduces dynamic direction switching capability in the sheet feeder, allowing it to change between first direction and second direction based on the required processing mode. This dynamic adaptability enables a single compact device to perform multiple functions rather than requiring separate specialized devices.
3Adaptability or versatility
If the sheet feeder switches between first direction and second direction, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The patent merges the sheet feeding functions for both first direction and second direction into a single sheet feeder mechanism. By combining these functions in one device with direction switching capability, the overall system complexity is reduced compared to having separate feeding mechanisms for each direction.
Data Source
AI summary
In a sheet processing device, a sheet feeder feeds a sheet fed thereinto, by switching to any one of a first direction same as a feed-in direction of a sheet and a second direction orthogonal to the first direction. A second sheet processor is arranged in the second direction and performs a process including a center-folding process on the sheet. A first sheet processor is arranged in the first direction and performs a process other than the center-folding process on the sheet.