Flying Web-Change Proof Printing for Continuous Press Inspection

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Solution Overview

Problem

Existing methods for creating proof prints in web-processing printing presses result in production losses and increased costs due to the need to stop the printing process for inspection, leading to waste generation.

Innovation Solution

A method for creating a proof print during a flying web change in a web-processing printing press, allowing the proof print to be produced on an end or edge portion of the web without stopping the machine, enabling inspection while production continues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the printing press is stopped to create and inspect a proof print, then inspection quality is improved, but productivity decreases and production losses occur

Engineering Contradiction:

Improveproof print inspection qualityVSAvoidproduction output

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The proof print is created in advance on the end portion of the web during normal printing operations, allowing inspection to be performed without stopping the press. The end portion serves as a pre-prepared sample that can be inspected offline while production continues uninterrupted.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The web is divided into a main production portion and an end portion. The end portion is specifically designated for proof printing and inspection purposes, separating the inspection function from the continuous production process.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If the printing press is stopped for proof print inspection, then measurement accuracy is improved, but loss of time increases

Engineering Contradiction:

Improvecolor measurement accuracyVSAvoidproduction downtime

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The proof print is prepared in advance on the end portion of the web while the press is running. This preliminary action allows the main production to continue without interruption, and the proof print can be inspected at a convenient time without causing production delays.

Inventive Principle:

Principle #10Preliminary action

3Loss of substance

If waste material is used for proof printing, then material utilization is improved, but manufacturing precision may be compromised

Engineering Contradiction:

Improveweb material wasteVSAvoidproof print quality

Core Design Contradiction:

Loss of substanceVSManufacturing precision

Solution Approach 1:

The end portion of the web is specifically prepared in advance for proof printing purposes. This preliminary designation ensures that the proof print is created under controlled conditions with appropriate material, rather than using random waste sections that may have defects or inconsistencies.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12427761B1Method for creating a proof print in a web-processing printing press

Publication Date: 2025.09.30 HEIDELBERGER DRUCKMASCHINEN AG

AI summary

A method for creating a proof print in a web-processing printing press, for example a rotary printing presses for the industrial printing of packaging, includes using the printing press to print a print job and, thereafter, a follow-up print job and producing the proof print for the follow-up print job. A preferably flying web change from a first web to a second web is carried out, and the proof print is made on an end portion of the first web and preferably upstream of an adhesive join between the two webs or on an edge portion of the first web or of the second web. A proof print is therefore created and, in the process, waste is reduced and the proof print is straightforwardly provided for inspection.