Defective Absorbent Article Rejection via Pneumatic Transfer
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Solution Overview
Problem
Existing systems for rejecting defective absorbent articles from manufacturing lines are complex, space-consuming, and not entirely accurate, often diverting both defective and non-defective products, necessitating a more efficient and precise method for high-speed selective rejection.
Innovation Solution
A system utilizing a transfer apparatus with rotating carrier members and a vacuum/positive pressure pneumatic system to detect and redirect defective articles, integrating with existing converting equipment to minimize space and complexity, and enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pneumatic air blasts are used to reject defective diapers, then defective products can be diverted from the stream, but the system requires extra space along the conveyor system and may not be entirely accurate
Solution Approach 1:
The patent combines the defect detection system and the rejection mechanism into a single integrated apparatus. The sensor array detects defects and the same apparatus uses pneumatic actuators to reject defective products at the same location, eliminating the need for separate rejection equipment and reducing space requirements along the conveyor system.
Solution Approach 2:
The patent introduces a controller as an intermediary that receives sensor data and automatically activates the rejection mechanism. This intermediary component enables accurate defect detection by processing sensor information and triggering rejection only for defective products, improving reliability while maintaining compact integration.
2Reliability
If mechanical switches are used to reject defective products, then defective items can be diverted to an alternative pathway, but more space is required to accommodate the mechanically activated switches
Solution Approach 1:
The patent replaces traditional mechanical switches with a pneumatic rejection system actuated by electrically controlled pneumatic actuators. This substitution eliminates the need for large mechanical switching equipment while maintaining accurate defect rejection capability, as the pneumatic system can be precisely controlled based on sensor detection.
Solution Approach 2:
The patent uses pneumatic actuators to provide the rejection force needed to divert defective products. The pneumatic system delivers precise, controlled force to reject only defective items at the detection location, achieving accurate rejection without the space requirements of mechanical switches.
3Productivity
If a separate system with pneumatic nozzles and hoses is used for rejection, then defective products can be removed from the stream, but the system complexity and space requirements increase
Solution Approach 1:
The patent merges the pneumatic rejection components into a single integrated apparatus located at the defect detection point. By combining detection and rejection functions in one location, the system eliminates the need for separate pneumatic nozzles and hoses distributed along the conveyor, reducing overall system complexity while maintaining high-speed rejection capability.
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
The system effectively and accurately rejects defective absorbent articles while minimizing space and complexity, improving the efficiency and precision of the rejection process.
Implementation Method 1
a vacuum system in communication with a porous and/or apertured carrier surface that allows a suction force of the vacuum system to be exerted on the absorbent article
Implementation Method 2
a positive pressure system in communication with the porous and/or apertured carrier surface that allows a blow-off force to be exerted on the absorbent article
Data Source
AI summary
The present disclosure relates to methods and apparatuses for rejecting defective absorbent articles from a converting line. At a downstream portion of a converting process, a continuous length of absorbent articles may be subjected to a final knife and cut to create discrete absorbent articles advancing on a first carrier. From the first carrier, the discrete absorbent articles may be transferred to a transfer apparatus, which in turn, transfers the discrete absorbent articles to a second carrier. The transfer apparatus may include carrier members that orbit around an axis of rotation and may be adapted to receive the absorbent articles from the first carrier and transfer the absorbent articles to the second carrier. Defective absorbent articles may be detected by an inspection system, which may be operably connected with the transfer apparatus and/or the first carrier to remove the defective absorbent articles from the converting process.