Paper Folding Device Timing Control for Tri-Folding Precision
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Solution Overview
Problem
Existing paper folding devices face challenges in accurately timing the creation of the second folding line during tri-folding operations, especially when dealing with multiple sheets or thicker papers, which can lead to creases and loose folding, and often require additional sensors increasing device complexity and cost.
Innovation Solution
A paper folding device that includes a first folding unit with rollers and a knife-shaped folding plate, a determining unit that calculates the optimal timing for starting the second folding operation based on paper characteristics such as number and thickness, allowing the second folding unit to form the second folding line at the appropriate time without increasing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sensor is provided to detect paper feeding position for timing the second folding step, then the folding timing precision is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The system uses its own existing components (rollers, folding plates, driving units) to generate timing information through their operational characteristics. The control unit calculates timing based on parameters from components already present in the system, eliminating the need for external sensors and making the system self-sufficient for timing detection.
Solution Approach 2:
The patent replaces the mechanical sensor-based detection system with a computational timing calculation system. Instead of using physical sensors to detect paper position, the control unit calculates the required timing based on operational parameters of the driving units and folding components, substituting mechanical detection with computational determination.
2Productivity
If the number of sheets increases, then the productivity is improved, but the folding quality deteriorates due to creases and loose folding
Solution Approach 1:
The system dynamically adjusts the timing of the second folding operation based on the number of sheets being processed. The control unit calculates different time periods from the first folding completion to the second folding start according to the sheet count, allowing the system to adapt its operational parameters to maintain folding quality regardless of batch size.
3Manufacturing precision
If the paper thickness increases, then the folding quality improves by avoiding loose folding, but the device complexity increases to accommodate thicker papers
Solution Approach 1:
The system changes the timing parameter (time period between first and second folding operations) based on paper thickness characteristics. The control unit receives paper information including thickness and adjusts the calculated timing accordingly, allowing the same device structure to handle different paper types optimally without requiring physical modifications.
Data Source
AI summary
In a paper folding device, a first driving unit for forming a first folding line on the paper moves a first folding plate member to the paper fed to a first feeding position until load on the first folding plate member reaches a prescribed value or higher. A time period from the start of driving of the first folding unit by the first driving unit to the start of driving of a second folding unit by a second driving unit is determined based on characteristic of paper.