Label Tape Reference Feed Positioning via Reverse Rewind
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Solution Overview
Problem
Existing methods for approaching a reference feed position of label strips in container labeling machines are cumbersome and not flexible enough to handle different label tapes, often requiring precise adjustment of push roller systems and leading to uncontrolled detachment of labels.
Innovation Solution
The method involves rewinding the label strip beyond the reference feed position and then conveying it under tension to the reference feed position using a roller system, eliminating the need for additional conveyor rollers and allowing for precise positioning through sensor monitoring, with a loop buffer maintaining constant tape tension and elastic pretension for adjustable tension generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a push roller system is used to retract the label tape to the reference feed position, then the reference feed position can be approached, but the system requires precise adjustment to the thickness and material of the label tape, limiting flexibility for different label tapes
Solution Approach 1:
The patent replaces the mechanical push roller system with an optical sensing system. Sensors detect the position of labels on the tape and provide feedback to a control unit, which automatically adjusts the tape feed. This substitution eliminates the need for mechanical adjustment to different label tape thicknesses and materials, providing both high positioning accuracy and universal adaptability.
Solution Approach 2:
The patent implements a feedback control system where sensors continuously monitor the label tape position and provide information to a control unit. The control unit processes this information and adjusts the tape feed accordingly, ensuring precise positioning at the reference feed position regardless of label tape variations, thus resolving the contradiction between positioning accuracy and adaptability.
2Manufacturing precision
If the label tape is unwound from the supply roll to reach the reference feed position, then the reference position can be established, but labels will pass over the dispensing edge and detach uncontrollably before the reference position is reached
Solution Approach 1:
The patent uses sensors to detect the position of labels on the tape in advance before they reach the dispensing edge. The control unit receives this advance information and calculates the precise moment to stop the tape feed, ensuring the reference feed position is reached exactly when a label is properly positioned, preventing any uncontrolled detachment.
Solution Approach 2:
The feedback control system continuously monitors label positions and provides real-time information to the control unit. This feedback enables the system to stop the tape feed at the precise moment when the reference feed position is reached, preventing labels from passing over the dispensing edge uncontrollably while maintaining accurate positioning.
3Manufacturing precision
If a separate roller system is used to retract the label tape, then the reference feed position can be approached, but additional complex transport systems are required
Solution Approach 1:
The patent replaces the mechanical separate roller retraction system with an optical-electronic control system. Sensors detect label positions and the control unit manages the tape feed, eliminating the need for additional mechanical rollers and transport mechanisms. This reduces device complexity while maintaining or improving reference feed position control accuracy.
Solution Approach 2:
The feedback control system uses sensor information to automatically manage the tape feed to the reference position, replacing complex mechanical retraction systems. This electronic feedback mechanism achieves precise position control without requiring additional mechanical components, thereby reducing overall system complexity.
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 enables fully automatic and precise positioning of the label strip at the reference feed position, accommodating labels of varying thickness and mechanical properties without the need for actively driven conveyor systems, ensuring controlled detachment and efficient labeling operations.
Implementation Method 1
conveying it under tension to the reference feed position using a roller system
Implementation Method 2
roller system operates as a push roller system during labeling
Implementation Method 3
loop buffer maintaining constant tape tension and elastic pretension for adjustable tension generation
Data Source
AI summary
A method for approaching a reference feed position (RFP) of a label tape (3) with respect to a dispensing edge (6) of a container labeling machine (20) and a corresponding device are described. By first rewinding the label tape onto its supply roll (4) beyond the reference feed position and then advancing it in the normal feed direction to the reference feed position, unwanted label detachment at the dispensing edge due to unwinding of the label tape from the supply roll can be avoided, as can the use of pusher roller systems upstream of the dispensing edge.