Small Diameter Transfer Roller for Card Lamination

Solution Overview

Problem

Conventional card substrate laminating devices require long warm-up times and high energy consumption due to their large, high heat capacity rollers, which are inefficient when processing a single card substrate.

Innovation Solution

A card substrate laminating device with a transfer roller having a circumference less than half the length of the card substrate, allowing for faster heating and reduced energy usage, and enabling the roller to rotate more than two times during lamination, thus improving energy efficiency and reducing warm-up time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a large heated roller with high heat capacity is used, then uniform heating and temperature stability during lamination are improved, but warm-up time and energy consumption increase significantly

Engineering Contradiction:

Improvetemperature stabilityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by stationary object

Solution Approach 1:

The patent changes the physical parameters of the heated roller by reducing its diameter from conventional large sizes to a small size (less than half the length of the card substrate), which fundamentally alters its heat capacity and thermal behavior, enabling fast heating while maintaining adequate temperature control for lamination

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements periodic heating cycles where the small heated roller is rapidly heated to operating temperature, used for lamination, then cooled down, allowing the device to be turned off between operations. This periodic operation pattern eliminates continuous energy consumption while maintaining reliable lamination performance

Inventive Principle:

Principle #19Periodic action

2Duration of action of stationary object

If a large heated roller with high heat capacity is used, then temperature stability during multiple lamination operations is improved, but warm-up time before first operation increases

Engineering Contradiction:

Improvetemperature stabilityVSAvoidwarm-up time

Core Design Contradiction:

Duration of action of stationary objectVSLoss of time

Solution Approach 1:

The patent changes the physical parameters of the heated roller by reducing its diameter from conventional large sizes to a small size (less than half the length of the card substrate), which fundamentally alters its heat capacity and thermal behavior, enabling fast heating while maintaining adequate temperature control for lamination

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies preliminary heating only when needed - the small heated roller is rapidly heated to operating temperature immediately before lamination operations are required, rather than maintaining continuous heat. This preliminary action approach eliminates prolonged warm-up times while ensuring the roller reaches adequate temperature for effective lamination

Inventive Principle:

Principle #10Preliminary action

3Use of energy by stationary object

If a small heated roller with low heat capacity is used, then warm-up time and energy consumption are reduced, but ability to maintain continuous heat transfer may be compromised

Engineering Contradiction:

Improveenergy consumptionVSAvoidheat transfer consistency

Core Design Contradiction:

Use of energy by stationary objectVSReliability

Solution Approach 1:

The patent changes the physical parameters of the heated roller by reducing its diameter from conventional large sizes to a small size (less than half the length of the card substrate), which fundamentally alters its heat capacity and thermal behavior, enabling fast heating while maintaining adequate temperature control for lamination

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements feedback control through a controller that monitors and adjusts the heating element to maintain the heated roller at a predetermined operating temperature. This feedback mechanism ensures consistent heat transfer to the transfer layer during lamination, compensating for the small roller's lower heat capacity and preventing temperature fluctuations that would compromise lamination quality

Inventive Principle:

Principle #23Feedback

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 quick heating and efficient lamination operations, reducing energy waste and allowing the device to be turned on only when needed, while maintaining effective heat transfer for uniform lamination.

Implementation Method 1

The heated roller is used to heat the patch to activate the adhesive, and press the patch to a surface of the card substrate to bond the patch onto the surface

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

The heated roller is used to heat the patch to activate the adhesive

Methodology Applied

Scientific EffectThermal activation: Heating

Data Source

PatentUS11511530B2Card substrate laminating device

Publication Date: 2022.11.29 ASSA ABLOY AB

AI summary

A card substrate laminating device including a transfer roller configured to heat a portion of a transfer layer of a transfer ribbon and transfer the portion of the transfer layer from a carrier layer of the transfer ribbon to a surface of a card substrate. The transfer roller includes a diameter of less than 0.537 inches and a compliant exterior surface layer or coating. The compliant exterior surface layer or coating can include silicon rubber. The compliant exterior surface layer or coating can be approximately 0.020 inches thick. An internal heating element is configured to heat the transfer roller from an ambient temperature to a laminating temperature, at which laminating operations are performed, within 40 seconds.