Booklet Bonding Pressure Control for Variable Sheet Thickness
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Solution Overview
Problem
Existing booklet making apparatuses face challenges in maintaining a consistent pressurizing force for bonding sheets due to variations in the thickness of the sheet bundle, leading to inconsistent bonding quality.
Innovation Solution
The apparatus includes a heat-and-pressure bonding portion with a pressurizing member, a receiving member, and a moving portion, utilizing an elastic member to maintain a constant deformation amount and a controller to adjust the pressurizing force to a preset value, ensuring consistent bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a spring mechanism is used to apply pressure to the heater plate, then the pressurizing force can be generated automatically, but the pressurizing force varies with sheet bundle thickness leading to inconsistent bonding
Solution Approach 1:
The patent transitions from a static spring mechanism to a dynamic control system that actively adjusts the pressurizing force. The controller monitors the actual pressurizing force and dynamically adjusts the drive source output to maintain the target pressurizing force, resolving the inconsistency caused by varying sheet bundle thicknesses.
Solution Approach 2:
The patent implements a feedback control mechanism where the controller receives information about the actual pressurizing force and adjusts the drive source accordingly. This closed-loop feedback system ensures that the pressurizing force remains consistent regardless of sheet bundle thickness variations, directly addressing the bonding consistency problem.
2Device complexity
If the pressurizing mechanism is simplified using springs, then the device complexity is reduced, but the pressurizing force cannot be precisely controlled to a desired value
Solution Approach 1:
The patent replaces the purely mechanical spring-based pressurizing system with a controlled drive source mechanism. This substitution allows for precise electronic control of the pressurizing force while maintaining relative mechanical simplicity, achieving both force precision and ease of operation.
Solution Approach 2:
The patent changes the control parameter from passive spring deformation to active drive source output control. By adjusting the drive source output based on feedback, the system can precisely control the pressurizing force parameter to match the target value, overcoming the limitations of fixed spring characteristics.
3Reliability
If the pressurizing force is increased to ensure bonding, then bonding reliability improves, but the deformation of coupling spring changes with sheet thickness causing force inconsistency
Solution Approach 1:
The system dynamically adjusts the pressurizing force based on actual conditions rather than relying on fixed spring deformation. This dynamic control ensures that the pressurizing force remains stable and reliable across different sheet thicknesses, maintaining consistent bonding quality.
Solution Approach 2:
The feedback control mechanism continuously monitors the pressurizing force and makes real-time adjustments to maintain stability. This ensures that bonding reliability is maintained at the desired level while compensating for variations in sheet bundle thickness that would otherwise cause force instability.
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 configuration ensures that the pressurizing force is maintained at a desired value, resulting in consistent and high-quality bonding of sheets into booklets, regardless of the thickness of the sheet bundle.
Implementation Method 1
a heating portion configured to heat the pressurizing member
Implementation Method 2
an elastic member configured to generate an urging force for applying a pressure between the pressurizing member and the receiving member
Data Source
AI summary
A booklet making apparatus includes a heat-and-pressure bonding portion including a pressurizing member, a receiving member, a moving portion configured to move the pressurizing member, and a heating portion configured to heat the pressurizing member. The booklet making apparatus is configured to nip, heat, and pressurize, between the pressurizing member and the receiving member, a plurality of sheets on at least one of which an adhesive layer is formed, and thus make a booklet. The booklet making apparatus further includes an elastic member. A deformation amount of the elastic member is constant while the moving portion moves from a first position to a second position. In a case where the moving portion moves from the second position to a third position, the deformation amount of the elastic member increases in accordance with a movement amount the moving portion.