Automated Defective Document Removal in Continuous Mail Processing
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Solution Overview
Problem
Current methods for addressing defective printed material in continuous forms printing are costly and inefficient, as they often require stopping the printer, cutting and removing entire documents or print runs, resulting in significant material waste and reduced production throughput.
Innovation Solution
A system and method that uses print inspection data to uniquely identify defective pages and allow their removal from the document processing system without stopping the printer, using image processing and unique identifiers to flag and isolate defective documents for removal while continuing to process subsequent documents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the printer is stopped and defective material is manually removed, then the defective material can be corrected, but production throughput is reduced and material waste increases
Solution Approach 1:
The patent extracts the defective document from the continuous stream by using a diverter mechanism that redirects only the identified defective document to a separate collection area, allowing the printer to continue operating without stopping while removing only the problematic material
Solution Approach 2:
The patent replaces the manual mechanical stopping and cutting process with an automated optical inspection system that uses sensors, image processing, and computer control to identify and divert defective documents, eliminating the need to halt production
2Reliability
If crosswise cuts are made to remove defective material, then the defective pages can be removed, but additional non-defective pages must also be removed
Solution Approach 1:
The patent extracts only the specific defective document from the continuous stream using precise positioning and diverter mechanisms, eliminating the need to cut and discard surrounding non-defective pages that would be required with crosswise cutting methods
Solution Approach 2:
The patent segments the continuous paper web into individual document boundaries using detection systems that identify document delimiters, enabling selective removal of only the defective document while preserving the integrity and usability of adjacent documents
3Reliability
If the printer is stopped and reloaded after a break in the printed paper web, then the defective material can be addressed, but production throughput is further reduced
Solution Approach 1:
The patent maintains continuous operation of the printer by implementing an automated system that detects, flags, and diverts defective documents in real-time without interrupting the printing process, allowing the useful action of printing to continue uninterrupted
Solution Approach 2:
The patent introduces an intermediary diverter mechanism positioned between the printer and the collection area that can redirect defective documents without requiring the printer to stop or reload, acting as a mediator that handles defect removal while preserving continuous production
Data Source
AI summary
The present application relates to techniques and equipment for printing documents, inspecting the quality of the documents and correcting for defective printed material in a document processing environment. The present techniques and equipment detect one or more defective pages in a document and uniquely identify the defective document. Once the defective document is identified, it can be removed from a document processing system while continuing the document processing run for subsequent documents in a mailing.