Blank Orientation in Folding and Gluing Machines

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Solution Overview

Problem

Conventional folder-gluer machines face difficulties in performing operations on the external face of blanks during the inline folding and gluing process, as printing and quality control are hindered by the need to access the external face from above or below, with the latter risking clogging due to gravity.

Innovation Solution

A working device with first and second turnover means to position the external face of blanks upward and downward, respectively, allowing for printing and checking during transport, thereby enabling access from above and mitigating clogging risks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If printing and checking operations are performed from below on blanks with external face underneath, then the external face is accessible for operations, but print heads and sensors become clogged due to gravity

Engineering Contradiction:

ImproveAccessibility to external faceVSAvoidClogging of print heads and sensors

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent inverts the conventional approach by turning blanks over so the external face is accessible from above instead of below. This inversion allows print heads and sensors to operate from the upper side, eliminating gravity-induced clogging while maintaining full accessibility to the external face for printing and checking operations

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of operation

If printing is performed from above after folding and gluing, then the external face is accessible, but the available surface is significantly reduced

Engineering Contradiction:

ImproveAccessibility to external faceVSAvoidAvailable surface area

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The patent performs printing and checking operations before the folding and gluing process by turning over the flat blanks. This preliminary action allows access to the complete external surface area of the blank before it is folded into a carton, enabling full-face printing and checking that would be impossible after folding when surface area is reduced

Inventive Principle:

Principle #10Preliminary action

3Productivity

If blanks are fed with external face underneath for continuous production, then high production rates are achieved, but operations on the external face become difficult

Engineering Contradiction:

ImproveProduction rateVSAvoidAccessibility to external face

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The patent introduces dynamic turnover means that temporarily change the orientation of blanks during the production process. Blanks are dynamically flipped to present the external face upward for printing and checking operations, then flipped back to the downward position for continued high-speed folding and gluing, thus maintaining both productivity and operational accessibility

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9434120B2Working device and folding and gluing machine incorporating such a device

Publication Date: 2016.09.06 BOBST MEX SA

AI summary

A working device (1) to be used on blanks running essentially in a planar manner within a folding and gluing machine, with the outer printable surface originally oriented downwards. First turning device (10) turns over each blank so as to position its outer surface on the top. A transport device (20) moves each blank with the outer surface on the top. An action device (30) implements at least one of printing the outer surface of each blank on the one hand and monitoring the outer surface of each blank on the other hand, while the outer surface is facing up. A second turning device (40) turns over each blank again in order to reposition its outer surface downward.