Bidirectional Labeling Device for Thermoforming Packaging

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Solution Overview

Problem

Thermoforming packaging machines face reduced operational speed due to labeling devices that can only apply labels while moving in the upstream direction, as upstream-facing sensors cannot detect empty or improperly filled packages when the device moves downstream, necessitating re-homing and reducing labeling efficiency.

Innovation Solution

A thermoforming packaging machine with a labeling device that moves back and forth between downstream and upstream positions, equipped with sensors positioned upstream to detect unfilled or improperly filled packages, preventing label application to these packages while allowing label application in both directions, thus enhancing labeling speed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the labeling device uses upstream-facing sensors to detect empty packages, then label application accuracy is improved, but operational speed deteriorates because the device must re-home downstream before applying labels

Engineering Contradiction:

Improvelabel application accuracyVSAvoidoperational speed

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The labeling device transitions from a static positioning system to a dynamic bidirectional movement system. The device can now move in both upstream and downstream directions while applying labels, eliminating the need to re-home downstream before each labeling operation. This dynamic adaptation allows continuous operation at full speed while maintaining accurate label placement on detected packages.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The conventional unidirectional labeling approach is inverted to enable bidirectional operation. Instead of always moving upstream to label packages, the device can now move downstream to apply labels after upstream sensors detect empty packages. This inversion eliminates the re-homing requirement and resolves the speed-accuracy contradiction.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If the labeling device re-homes from upstream to downstream position, then sensor detection capability is maintained, but labeling efficiency deteriorates due to lost time during re-homing movements

Engineering Contradiction:

Improvesensor detection capabilityVSAvoidre-homing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The labeling device eliminates idle re-homing movements by implementing continuous bidirectional labeling operations. The device maintains sensor detection capability while continuously applying labels in both upstream and downstream directions, ensuring that every movement phase contributes to productive labeling rather than resetting to a home position.

Inventive Principle:

Principle #20Continuity of useful action

Solution Approach 2:

Upstream sensors perform preliminary detection of empty packages before the labeling device reaches them. This advance detection allows the device to prepare for label application in both directions without needing to re-home, as the detection and labeling actions are already coordinated through the bidirectional movement system.

Inventive Principle:

Principle #10Preliminary action

3Manufacturing precision

If the labeling device operates unidirectionally in the upstream direction, then label placement precision is improved, but overall productivity deteriorates due to limited labeling capacity

Engineering Contradiction:

Improvelabel placement precisionVSAvoidlabeling speed

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The labeling device transitions from unidirectional to bidirectional dynamic operation. By maintaining precise control over movement in both upstream and downstream directions, the device preserves label placement precision while doubling its effective labeling capacity. The system dynamically selects the optimal direction based on package flow and sensor detection results.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The labeling device gains multi-functionality by operating effectively in both upstream and downstream directions. This universal capability allows the single device to handle varying production demands and package configurations, maintaining precision while significantly increasing overall labeling throughput compared to unidirectional operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20240400248A1Package labeling device and method

Publication Date: 2024.12.05 ULTRASOURCE

AI summary

A method of labeling product packages on a thermoforming packaging machine is provided to prevent the unnecessary dispensing of labels onto unfilled, improperly filled and absent product packages. Crosswise rows of product packages are moved in a downstream transport direction on the thermoforming machine using alternating dwell and advancing intervals. A labeling device mounted on the thermoforming packaging machine moves back and forth between a downstream position and an upstream position and applies to the product packages while the labeling device is moving from the downstream position to the upstream position and while the labeling device is moving from the upstream position to the downstream position. One or more sensors positioned on the thermoforming packaging machine upstream from the upstream position of the labeling device identify the presence of any unfilled, improperly filled or absent product packages in the crosswise rows of product packages before they reach the upstream position of the labeling device to prevent the labeling device from applying labels to any such product packages. A thermoforming packaging machine is also provided on which the method may be performed.