Internal Induction Heating for Tea and Coffee Bag Sealing
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Solution Overview
Problem
Existing sealing technologies for producing tea or coffee bags require significant amounts of energy for high-speed sealing operations, particularly due to the use of external heat sources which are inefficient and difficult to control uniformly.
Innovation Solution
The use of induction heater elements within the sealing rollers to generate heat from within the roller, allowing for precise application of heat energy to specific segments of the roller circumference, thereby enhancing efficiency and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If external heat sources are used for sealing, then sealing operation can be performed, but energy consumption is high and heat distribution is difficult to control uniformly
Solution Approach 1:
The patent inverts the conventional heating approach by placing the heat source inside the sealing roller rather than externally. The induction heater element is positioned within the roller to generate heat from within, which naturally distributes uniformly through the roller material to the sealing surface, eliminating the energy inefficiency and control difficulties of external heating systems
Solution Approach 2:
The patent replaces conventional external thermal heating systems with an induction heating system that uses electromagnetic fields to generate heat directly within the roller. This substitution of heating mechanism dramatically reduces energy consumption while providing precise and uniform heat distribution across the sealing surface
2Use of energy by stationary object
If induction heater elements are used within rollers, then energy consumption is reduced and heat control is improved, but device complexity increases
Solution Approach 1:
The patent merges the heating function directly into the sealing roller by integrating the induction heater element within the roller structure. This combination eliminates the need for separate external heating systems, reducing overall device complexity while achieving superior energy efficiency and heat control
Solution Approach 2:
The sealing roller is designed to serve multiple functions: it provides the sealing surface for bonding web material and simultaneously contains the induction heater element for heat generation. This multi-functionality reduces the number of separate components needed, offsetting the added complexity of the induction heating system with operational simplicity
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 method reduces energy consumption and improves heat distribution, enabling faster and more controlled sealing processes for producing tea or coffee bags.
Implementation Method 1
an induction heater element configured to extend axially within the roller such that heat generating energy is applied from within the roller to a segment of the roller
Implementation Method 2
an induction heater element configured to extend axially within the roller such that heat generating energy is applied from within the roller
Implementation Method 3
sealing surface areas arranged to apply pressure and heat to web material guided into contact with the roller
Implementation Method 4
heating the sealing region of the web material in the at least one nip zone
Data Source
AI summary
Apparatuses and methods for production of tea bags or coffee bags from web material are disclosed. An apparatus (1) is provided comprising a first roller (10, 60) and a second counterrotating roller (12, 62) arranged to form at least one nip zone therebetween for applying pressure to a sealing region of web material guided through the at least one nip zone. At least one induction heater element (70, 72) is arranged within at least one of the rollers to apply heat generating energy to at least one of the rollers for heating the sealing region of the web material in the at least one nip zone. A heating apparatus within a roller can comprise at least one induction heater element arranged axially relative to the roller so that heat generating energy is applied only to a segment of the roller.