Short Feed Label Applicator for High Speed Cylindrical Articles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current label applicator systems for cylindrical objects are inefficient due to 'long feed' configurations, which require more frequent roll changes and limit labeling speeds to about 300 articles per minute, as they are not capable of handling 'short feed' label configurations efficiently.
Innovation Solution
A label application system utilizing a vacuum conveyor with a flat vacuum surface and stepper motor control to apply labels in a 'short feed' orientation, where labels are cut and glued on the conveyor, and then applied to rotating articles in a stationary position, allowing for higher labeling speeds by orienting the vacuum conveyor transversely to the article conveyor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If long feed label configuration is used, then the label applicator can handle cylindrical articles, but the labeling speed is limited to about 300 articles per minute and roll changes are frequent
Solution Approach 1:
The patent transitions from traditional long feed configuration (labels fed parallel to article axis) to short feed configuration (labels fed perpendicular to article axis). This dimensional change allows the label to be oriented across the width of the conveyor rather than along its length, enabling more labels per roll and reducing feed distance.
Solution Approach 2:
The patent inverts the conventional label feeding approach by using a transverse feed direction instead of longitudinal feed. The vacuum conveyor moves perpendicular to the article conveyance direction, and labels are applied from the side rather than from the front, fundamentally reversing the traditional labeling geometry.
2Productivity
If long feed label configuration is used, then the labeling system is simple, but fewer labels can be carried on each roll requiring frequent change out
Solution Approach 1:
The patent employs a stepper motor to dynamically control the vacuum conveyor's motion, enabling it to start, stop, and position precisely at different locations along its path. This dynamic control allows the conveyor to deliver labels at optimal moments while maintaining synchronization with the article conveyor, facilitating high-speed operation with complex timing requirements.
Solution Approach 2:
The system uses sensors and control systems to monitor the positions of both the vacuum conveyor and article conveyor, providing feedback to the stepper motor controller. This feedback mechanism ensures precise coordination between label delivery and article passage, enabling the complex transverse feeding operation to occur reliably at high speeds.
3Manufacturing precision
If the vacuum conveyor moves continuously, then labels are fed efficiently, but the label cannot be applied accurately to the rotating article
Solution Approach 1:
The vacuum conveyor operates in periodic cycles: it moves forward to deliver the next label, then stops precisely when a label is positioned for application. This stop-move-stop pattern repeats for each label-article pairing, allowing accurate application while maintaining overall high throughput through rapid cycling of the periodic action.
Solution Approach 2:
The vacuum conveyor advances the label into position and stops it in advance of the actual application moment. This preliminary positioning ensures the label is perfectly aligned and stationary before the article contacts it, guaranteeing application accuracy. The system prepares each label in advance rather than attempting application during motion.
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 system achieves labeling speeds of up to 800 articles per minute, reducing change-out shutdowns and increasing efficiency by allowing more labels per roll and minimizing the distance the web needs to advance, compared to traditional long feed systems.
Implementation Method 1
a vacuum conveyor on which a flat vacuum surface is disposed
Data Source
AI summary
A label application system for applying paper non-pressure adhesive labels to relatively short, round, straight-walled articles is constructed and designed so that labels to be applied to passing articles are delivered to the label application zone on a vacuum conveyor in a short feed orientation, with each label being oriented lengthwise across a width of the vacuum conveyor. At the time of labeling, the label is held stationary on a flat vacuum surface, and the label is applied by spinning the articles past the vacuum surface. As a result, the system is capable of labeling articles at processing speeds of up to or exceeding 800 articles per minute.