Spreading Element Pressure Regulation for Thin Foil Sleeving
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Solution Overview
Problem
Existing container sleeving systems are less suitable for handling thin and flexible foil materials, often resulting in jamming issues at the distal end of the spreading element, especially when a high handling rate and reliability are required.
Innovation Solution
Incorporating pressure regulating openings on the distal and/or proximal spreading element portions to regulate pressure close to the outer surface, which reduces the likelihood of sleeve jamming by equalizing the pressure difference caused by the Bernoulli effect, and using ambient air to compensate for low pressure within the gap between the sleeve and the spreading element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If thin and flexible foil material is used to make sleeves, then the sleeves become more flexible and can conform better to containers, but the sleeves tend to jam on the spreading element especially at the distal end
Solution Approach 1:
The patent introduces a pneumatic system with air nozzles positioned near the distal end of the spreading element. Compressed air is directed through these nozzles to create an air cushion between the sleeve and the spreading element surface, reducing friction and preventing jamming of thin flexible sleeves during the discharge process.
Solution Approach 2:
The patent introduces air as an intermediary substance between the sleeve and the spreading element. This air layer acts as a mediator that reduces direct contact and friction, allowing thin flexible sleeves to move smoothly over the spreading element without jamming at the distal end.
2Volume of moving object
If the foil material thickness is reduced to 20 μm or less, then the sleeves become thinner and more flexible, but the likelihood of jamming on the spreading element increases
Solution Approach 1:
The patent employs pneumatic air nozzles that deliver compressed air to the interface between the thin sleeve and spreading element. This pneumatic approach is particularly effective for very thin sleeves (20 μm or less) as the air cushion provides sufficient lift and reduction in friction without requiring mechanical modifications that could damage the delicate material.
Solution Approach 2:
The patent changes the physical parameters of the interface between sleeve and spreading element by introducing air pressure. By controlling the air pressure and flow rate through the nozzles, the system optimizes the conditions for handling extremely thin sleeves, transforming the friction-based contact into a reduced-friction pneumatic interface.
3Productivity
If a high handling rate is required, then the sleeving process must be accelerated, but this increases the velocity difference between sleeve and spreading element causing greater pressure difference and jamming tendency
Solution Approach 1:
The patent uses pneumatic air nozzles that can be activated dynamically during the sleeving process. When high handling rates are required and velocity differences increase, the air cushion provides immediate friction reduction to prevent jamming, allowing the system to operate at higher speeds without sacrificing reliability.
Solution Approach 2:
The patent implements a dynamic solution where air nozzles can be activated or adjusted based on operating conditions. The air cushion effect can be modulated to match the velocity difference between sleeve and spreading element, providing adaptive friction reduction that maintains reliable operation across a range of handling rates.
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 solution enables reliable and fast arrangement of very thin sleeves around containers, reducing the risk of jamming and ensuring smooth movement over the spreading element, even with foil materials as thin as 20 μm or less.
Implementation Method 1
The velocity difference between the sleeve and the spreading element in combination with the high flexibility of a very thin sleeve may cause the pressure on the inner side of the sleeve inside said gap to be lower than the pressure on the outside of the sleeve (Bernoulli-effect).
Implementation Method 2
one or more pressure regulating openings configured to regulate the pressure close to the outer surface of the distal spreading element portion
Data Source
AI summary
The present disclosure relates to a container sleeving device, system and method for arranging sleeves on a plurality of containers, wherein the sleeves are made of tubular foil material made to pass over the circumferential outer surface of a spreading element, the container sleeving device comprising:—a spreading element configured to spread open the tubular foil material passing from a proximal spreading element portion (31) towards a distal spreading element portion (34);—a cutting unit (25) for cutting the spread-open tubular foil material to form a sleeve;—a sleeve discharge unit (28) configured to accelerate the sleeve to move over the outer surface of the distal spreading element portion so as to discharge the sleeve towards a container; wherein the distal spreading element portion and/or the proximal spreading element portion has one or more pressure regulating openings configured to regulate the pressure close to the outer surface of the distal spreading element portion and/or of the proximal spreading element portion.