Rod-Stack Book Block Segmentation for Pressing and Separation
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Solution Overview
Problem
Existing methods for producing adhesive-bound printed products, such as books, face challenges in ensuring even pressing and separation of book blocks during storage, leading to deformation and increased paper consumption, especially when using digital printing machines with varying content.
Innovation Solution
Forming book blocks into a rod structure with different format parts, where each part has aligned boundary surfaces and a protruding second boundary surface, allowing for even pressing and separation, and using folded edges as lower edges for mechanical strength, with optional inclusion of information carriers for identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If book blocks are stacked with identical formats and orientations, then storage space utilization is improved, but separation and alignment in subsequent processing becomes difficult
Solution Approach 1:
The patent divides the stack into book blocks with different formats (first format and second format), creating segment boundaries that facilitate separation. The mixed format arrangement allows clear identification of individual book blocks while maintaining compact storage, resolving the contradiction between storage efficiency and separability.
Solution Approach 2:
The patent introduces asymmetry by stacking book blocks in alternating orientations and formats. Instead of uniform identical blocks, the asymmetric arrangement with different formats (e.g., A5 and A4 sizes) creates distinguishable boundaries that enable easy separation and alignment during subsequent processing while still achieving high storage density.
2Manufacturing precision
If printed sheets are pressed uniformly, then deformation is reduced, but separation points become indistinct
Solution Approach 1:
The patent creates distinct separation points by alternating book block formats, which naturally create boundaries without requiring differential pressing. The segmented structure allows uniform pressing across the entire stack while maintaining clear separation points at the interfaces between different format blocks.
Solution Approach 2:
The patent applies local quality differentiation by using different formats for different book blocks. This local variation in dimensions creates natural separation points and alignment references without compromising the uniformity of pressing force applied to the entire stack, resolving the contradiction between pressing uniformity and separation clarity.
3Strength
If adhesive is applied to bind printed sheets, then book blocks are secured, but paper consumption increases due to trimming losses
Solution Approach 1:
The patent performs preliminary formatting by creating book blocks with different formats before binding. This preliminary action allows the perfect binder to process blocks efficiently without requiring excessive trimming, thereby reducing paper consumption while maintaining secure binding through adhesive application at optimized locations.
Solution Approach 2:
The patent changes the format parameter of book blocks to create a mixed-format stack. This parameter variation optimizes the binding process by reducing the amount of material that requires trimming, thereby securing book blocks with adhesive while minimizing paper consumption and waste.
4Adaptability or versatility
If digital printing machines produce varying content, then customization is improved, but consistent stacking and storage becomes difficult
Solution Approach 1:
The patent segments the output of digital printing machines into book blocks with different formats based on content requirements. This segmentation allows each book block to be customized for its specific content while maintaining a consistent overall stack structure through the alternating format pattern, resolving the contradiction between customization and stack stability.
Solution Approach 2:
The patent uses asymmetric format variation to accommodate customized content from digital printing machines. By alternating between different book block formats (e.g., A5, A4), the system maintains adaptability for content customization while creating a stable, recognizable stacking pattern that ensures consistent composition and facilitates handling.
Data Source
Figure 1~1a
Figure 2
Figure 3~4
AI summary
The method involves forming the blocks (3-1 to n) from different format sizes of the block parts (35-1 to n). The block part of the lateral, upper or lower surface (x-1,x-2,y-1,y-2,z-1,z-2) of a forming rod is provided with a boundary surface (36'-1 to n) that is aligned with one surface of the rod. Multiple printing sheets are combined to the block. The portions of the printed sheet are cut at different length and are folded by a cyclically adjustable aligning element that is displaced transversely in the driving direction of the printed sheet. An independent claim is provided for a rod with an information carrier for the identification.