Heating Pressurization Unit for Multi-Size Booklet Bonding
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Solution Overview
Problem
Existing booklet production apparatuses face challenges in maintaining uniform pressurization force distribution when handling sheets of different sizes, leading to reduced pressurization in areas other than the end portions of smaller sheets.
Innovation Solution
The apparatus employs an elongate heating pressurization unit with a pressurization plate, heating member, and reception member that applies a customized pressurization force profile, ensuring appropriate distribution across varying sheet sizes by adjusting the pressurization force based on the sheet size, with a minimum value in specific regions and increased force at the ends of smaller sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the heating pressurization unit is configured to pressurize large-size sheets with uniform pressurization force distribution, then large sheets are properly bonded, but small-size sheets experience concentrated pressurization at end portions with reduced pressurization in other areas
Solution Approach 1:
The pressurization plate is designed with varying thickness in the longitudinal direction, creating different pressurization characteristics in different regions. Specifically, the pressurization plate has a first thickness in a first region and a second thickness different from the first thickness in a second region, allowing each region to provide appropriate pressurization for different sheet sizes.
Solution Approach 2:
The invention changes the physical parameter of the pressurization plate (thickness) to achieve different pressurization force distributions. By varying the thickness of the pressurization plate along the longitudinal direction, the system can properly pressurize both large-size and small-size sheets without requiring separate pressurization mechanisms for each sheet size.
2Device complexity
If a uniform pressurization plate is used for all sheet sizes, then the structure is simple, but the pressurization force distribution becomes inappropriate for small-size sheets
Solution Approach 1:
Instead of using a completely different pressurization system for different sheet sizes, the invention modifies the pressurization plate locally by varying its thickness in specific regions. This approach maintains overall structural simplicity while achieving the required precision in pressurization force distribution through localized structural variations.
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 uniform bonding of sheets of different sizes, enhancing the adhesive strength and quality of the produced booklets by maintaining consistent pressurization throughout the bonding process.
Implementation Method 1
a heating member configured to heat the pressurization plate
Implementation Method 2
a pressurization mechanism configured to apply a pressure to the sheets nipped between the pressurization plate and the reception member
Data Source
AI summary
In a case where a region of a heating pressurization unit in a longitudinal direction of the heating pressurization unit where the heating pressurization unit heats and pressurizes a sheet of a maximum size is a first region, and a region of the heating pressurization unit in the longitudinal direction where the heating pressurization unit heats and pressurizes a sheet of a minimum size is a second region, and a region of the heating pressurization unit inside the first region and outside the second region in the longitudinal direction is a third region, the heating pressurization unit heats and pressurizes the sheet of the maximum size with a pressurization force profile having a minimum value in the longitudinal direction at a position in the third region or a position of an end portion of the second region adjacent to the third region.