Media Stack Separation via Multi-Axis Bending

Solution Overview

Problem

The automation of printing plate handling in CTP systems is hindered by the delicate nature of modifiable surfaces, which are easily marred, and the challenge of efficiently removing and storing slip-sheets interspersed between printing plates, leading to system throughput issues and errors due to electrostatic attraction and air expulsion.

Innovation Solution

A method involving a picking assembly that grips and bends the media combination along multiple axes, using flexing members to separate adhered sheets, allowing for simultaneous handling of printing plates and slip-sheets without damaging the plates, and efficiently conveying them to separate storage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If slip-sheets are removed sequentially from the media stack, then the delicate printing plates are protected from damage, but the system throughput is reduced

Engineering Contradiction:

Improveprinting plate integrityVSAvoidsystem throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The picking assembly performs preliminary separation of the slip-sheet from the printing plate before the plate is fully removed from the media stack. The flexing members apply bending forces to the media combination to break adhesive bonds and electrostatic attraction in advance, allowing subsequent rapid removal without damage to the plate surface.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The picking assembly uses dynamic flexing members that can bend along multiple axes to actively separate the slip-sheet from the printing plate during the removal process. This dynamic action allows the system to handle multiple sheets simultaneously while maintaining plate integrity through controlled bending forces.

Inventive Principle:

Principle #15Dynamics

2Reliability

If additional sheets are secured to prevent accidental removal, then separation reliability is improved, but throughput time increases

Engineering Contradiction:

Improveseparation accuracyVSAvoidthroughput time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The picking assembly performs preliminary separation of the slip-sheet from the printing plate before the plate is fully removed from the media stack. The flexing members apply bending forces to the media combination to break adhesive bonds and electrostatic attraction in advance, allowing subsequent rapid removal without damage to the plate surface.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If conventional fixed separation plates are used, then device complexity is reduced, but separation effectiveness is limited

Engineering Contradiction:

Improveseparation mechanism simplicityVSAvoidseparation effectiveness

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The picking assembly uses dynamic flexing members that can bend along multiple axes to actively separate the slip-sheet from the printing plate during the removal process. This dynamic action allows the system to handle multiple sheets simultaneously while maintaining plate integrity through controlled bending forces.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The flexing members can bend along multiple axes (first axis and second axis that is not parallel to the first axis), adding dimensional complexity to the separation action. This multi-axis bending capability significantly improves separation effectiveness compared to conventional fixed separation plates.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

This approach enhances the reliability and throughput of the printing process by effectively separating and handling printing plates and slip-sheets, reducing the risk of damage to the plates and minimizing system errors, while optimizing storage space by avoiding creasing of slip-sheets.

Implementation Method 1

Separating a slip-sheet from an adjacent plate can be complicated when the slip-sheet becomes adhered to a surface of the adjacent plate by physical mechanisms that can include electrostatic attraction

Methodology Applied

Scientific EffectElectrostatic attraction: Electrostatics

Implementation Method 2

Separating a slip-sheet from an adjacent plate can be complicated when the slip-sheet becomes adhered to a surface of the adjacent plate by physical mechanisms that can include electrostatic attraction or the expulsion of air between the surfaces

Methodology Applied

Scientific EffectAir expulsion:

Data Source

PatentUS7891655B2Separating media combination from a media stack

Publication Date: 2011.02.22 EASTMAN KODAK CO

AI summary

A method for moving a first combination of media from a media stack including one or more combinations of media. The first combination of media is an uppermost combination of media in the media stack. The method includes gripping the first combination of media and bending along a first axis by moving a first portion away from the media stack. The first combination of media is bent along a second axis by moving a flexing member while in contact with a second portion of the first combination of media, wherein the second axis is not parallel to the first axis. The first combination of media is repeatedly bent along the second axis while pausing movement of the first combination of media between the first bending along the second axis and the second bending along the second axis.