Booklet Printing Cover Pre-Scoring to Prevent Toner Peeling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Toner peeling occurs at the spine part of center-folded booklets when thick paper is used for the cover, leading to aesthetic issues and potential cracking, especially during saddle stitch printing.
Innovation Solution
A printing system that includes a pre-processing unit to create a linear bending mark or folding mark on the cover before center-folding, alleviating stress on the toner layer and preventing peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If center-folding is performed on thick paper covers without pre-processing, then the booklet can be produced, but toner peeling occurs at the spine part
Solution Approach 1:
The patent applies preliminary action by performing pre-processing (creating linear bending marks or folding marks) on the cover before the actual center-folding operation. This pre-marking creates stress relief zones that prevent toner peeling during the subsequent folding process, thereby resolving the contradiction between maintaining toner adhesion quality and performing the folding operation.
2Reliability
If folding grooves are created in all sheets to prevent folding insufficiency, then thick sheets can be folded properly, but protruding portions form on the sheet surface causing misalignment and paper clogging
Solution Approach 1:
The patent applies local quality by creating folding marks only on the cover sheet rather than on all sheets in the booklet. This localized approach provides the necessary stress relief for the thick cover to fold properly without creating protruding portions that would cause misalignment or clogging of subsequent sheets, thus resolving the contradiction between folding completeness and avoiding harmful effects.
Data Source
AI summary
A printing system includes: a driver that accepts a user operation related to setting of a print job and provides an instruction related to the print job; a printing unit that performs cover/interleaving paper printing in which printing is performed with at least a cover or an interleaving paper inserted, on the basis of the instruction; a booklet creating unit that performs booklet creation processing of creating a booklet by center-folding the cover and sandwiching other center-folding printed papers, on the basis of the instruction; and a pre-processing unit that performs processing of making a linear bending mark or a folding mark as pre-processing at a position on the cover, before the center-folding, at which the center-folding is to be performed, on the basis of the instruction.