Laminating Roll Tension Control to Prevent Media Slack
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Solution Overview
Problem
Existing laminating apparatuses generate slack in the first member when it is drawn out from the roll, leading to abnormalities in the finished laminated product during image recording and lamination.
Innovation Solution
A laminating apparatus with a first holder, second holder, image recording portion, laminating portion, first conveying roller, first rotary drive portion, and second rotary drive portion, which applies forces to the first holder and conveying roller to control the draw-out and take-up directions of the first member, reducing slack generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the first member is drawn out from the first roll farther than necessary, then the image recording and lamination processes can be completed, but slack is generated in the first member causing abnormalities in the finished laminated product
Solution Approach 1:
The first rotary drive portion applies a first force to the first holder in the take-up direction before and during the draw-out process to pre-tension the first member. This preliminary action prevents slack generation at the source, ensuring the member remains taut throughout the subsequent image recording and lamination operations.
Solution Approach 2:
The system dynamically adjusts the force parameters by applying different forces at different stages: the first rotary drive portion applies a first force in the take-up direction to prevent slack, while the second rotary drive portion applies a second force in the draw-out direction to enable conveyance. This parameter change ensures both productivity and manufacturing precision.
2Manufacturing precision
If a force is applied to the first holder to urge it to rotate together with the first roll in the take-up direction, then slack generation is reduced, but the complexity of the drive system increases
Solution Approach 1:
The first rotary drive portion serves multiple functions: it applies the first force to prevent slack generation, controls the tension of the first member during draw-out, and works in coordination with the second rotary drive portion. This multi-functionality justifies the added component by consolidating several control functions into a single device.
3Speed
If the second rotary drive portion applies force to rotate the first conveying roller in the draw-out direction, then the first member can be conveyed for processing, but slack may be generated if not balanced with take-up force
Solution Approach 1:
The controller coordinates the operation of the first and second rotary drive portions, using feedback from the system state to adjust the forces applied. The first rotary drive portion maintains take-up force while the second applies draw-out force, and the controller balances these forces to maintain optimal tension throughout the conveyance process, preventing both slack and excessive tension.
Data Source
AI summary
In a laminating apparatus, a first roll is mountable on a first holder. A first conveying roller is configured to hold a first drawn-out portion of a first member that has been drawn out from the first roll. A controller is configured to perform: applying, using a first rotary drive portion, a first force to the first holder; and applying, using a second rotary drive portion, a second force to the first conveying roller. When driving, in a state where the first conveying roller holds the first drawn-out portion, the second rotary drive portion to apply the second force to rotate the first conveying roller for conveying the first drawn-out portion in a draw-out direction, the controller drives the first rotary drive portion to apply the first force to act on the first holder for urging the first drawn-out portion to be conveyed in a take-up direction.