Case Bookbinding Paste Overflow Control
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Solution Overview
Problem
In case bookbinding, the excessive application of paste to enhance durability often results in overflow, degrading the quality of the booklet when the cover is opened, especially when a gutter is present, as it can lead to peeling off of the side portions.
Innovation Solution
A post-processing apparatus and method that control the paste application and pressurization to allow a controlled overflow of paste towards the gutter in case bookbinding, adjusting the amount and distribution based on gutter settings, including depth and side-specific settings, to maintain durability and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If paste is applied plentifully to increase durability, then binding strength is improved, but paste overflows onto the booklet side portion degrading quality
Solution Approach 1:
The patent applies different paste application amounts to different regions: the paste application member is configured to apply paste in a larger amount to the gutter side portion compared to the non-gutter side portion. This local differentiation allows sufficient paste for durability in the gutter region while preventing overflow on the non-gutter side, resolving the contradiction between binding strength and appearance quality.
2Manufacturing precision
If paste application amount is suppressed to prevent overflow, then quality is maintained, but durability of the booklet is reduced
Solution Approach 1:
The system differentiates paste application by location, applying sufficient paste to the gutter side where it is needed for durability, while suppressing paste application on the non-gutter side to prevent overflow. This selective approach maintains overall quality while ensuring durability where required.
Solution Approach 2:
The paste application member dynamically adjusts the paste application amount based on the position being coated, varying the application quantity between gutter and non-gutter sides. This dynamic adjustment allows optimization of both durability and appearance quality simultaneously.
3Strength
If paste overflows toward gutter in guttered cover, then durability and quality are improved, but paste must be precisely controlled to prevent peeling
Solution Approach 1:
The patent configures the paste application member to apply paste selectively and differentially to the gutter side portion, ensuring adequate paste presence for durability while controlling the amount to prevent harmful overflow that causes peeling. This localized control enhances both quality and reliability.
Solution Approach 2:
The system incorporates control mechanisms that monitor and adjust paste application in real-time, ensuring optimal paste distribution to the gutter region. This feedback control prevents excessive paste accumulation that would cause peeling while maintaining sufficient paste for strong adhesion.
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
The controlled overflow of paste enhances the durability and quality of the booklet by preventing peeling while maintaining the structural integrity of the guttered cover, ensuring a better appearance and binding strength.
Implementation Method 1
the paste to overflow in a larger amount from the back of the sheet bundle toward a gutter than an amount of overflow in a non-guttered cover setting
Implementation Method 2
a pressurization member configured to press a cover onto the back of the sheet bundle with the paste coated thereon
Data Source
AI summary
A post-processing apparatus for performing post-processing on a sheet having an image formed thereon, the post-processing at least including case bookbinding by using paste, the apparatus including: a paste applicator having a paste application member and configured to supply paste to coat a back of a sheet bundle with the paste; a pressurization member for pressing a cover onto the back of the sheet bundle with the paste coated thereon; and a controller configured to receive information relating to a cover gutter setting on the sheet bundle and to perform control over the paste applicator and the pressurization member, the controller being configured to cause, in a guttered cover setting, the paste to overflow in a larger amount from the back of the sheet bundle toward a gutter than an amount of overflow in a non-guttered cover setting based on the information relating to the cover gutter setting.