Sheet Laminator Presser Path to Prevent Curling and Press Marks
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Solution Overview
Problem
Existing sheet laminators leave pressing marks on laminated sheets due to incomplete curing of glue, or cause curling due to weight when pressing timing is delayed.
Innovation Solution
A sheet laminator with a sheet ejection roller pair, a sheet ejection tray, and a presser that moves the two-ply sheet along a specific path to avoid curling and ensure complete curing, using circuitry to control the presser's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the two-ply sheet is pressed against the sheet ejection tray immediately after lamination, then the sheet is prevented from curling, but pressing marks are left on the sheet due to incomplete glue curing
Solution Approach 1:
The patent introduces a preliminary stacking action before pressing. The two-ply sheet is first stacked on the sheet ejection tray at an intermediate position, allowing the glue to cure partially. Only after this preliminary stacking is the pressing action applied, ensuring the glue has sufficient strength to avoid pressing marks while maintaining sheet flatness.
2Manufacturing precision
If the pressing timing is delayed to allow glue curing, then pressing marks are avoided, but the two-ply sheet curls due to its weight
Solution Approach 1:
The patent performs preliminary stacking on the sheet ejection tray before pressing. This preliminary action maintains sheet flatness by supporting the sheet's weight, and only after this stabilization is complete is the pressing action applied, preventing curling while avoiding pressing marks.
Solution Approach 2:
The patent implements a dynamic, two-stage pressing process. The pressing action is divided into sequential phases: first stacking the sheet to maintain flatness, then applying pressing force after glue curing. This dynamic approach adapts the timing and magnitude of forces to the glue's curing state, resolving the contradiction between preventing curling and avoiding pressing marks.
3Productivity
If the presser moves directly to the stacking face, then the pressing operation is efficient, but the glue may not be completely cured causing pressing marks
Solution Approach 1:
The patent segments the pressing operation into two distinct phases: a first operation to move the presser to an intermediate position for stacking, and a second operation to move to the stacking face for pressing. This segmentation allows the glue curing process to occur during the transition, ensuring complete curing before pressing while maintaining operational efficiency through automated sequential execution.
Solution Approach 2:
The patent introduces a preliminary stacking phase before the main pressing action. The presser first moves to an intermediate position to stack the sheet, allowing glue curing to begin. Only after this preliminary action is complete does the presser proceed to the stacking face for pressing, ensuring surface quality without sacrificing productivity.
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
Prevents pressing marks and curling, ensuring smooth stacking of laminated sheets by optimizing the presser's timing and path, enhancing the quality of the lamination process.
Implementation Method 1
heat and pressure are applied to the two-ply sheet with a sheet medium
Implementation Method 2
heat and pressure are applied to the two-ply sheet with a sheet medium
Data Source
AI summary
A sheet laminator includes a sheet ejection roller pair, a sheet ejection tray, a presser, and circuitry. The sheet ejection tray has a receiving face to receive the two-ply sheet standing in the sheet ejection tray, and a stacking face facing the receiving face and inclined with respect to the vertical direction. The presser has a leading end to move the two-ply sheet on the receiving face toward the stacking face, and press the two-ply sheet onto the stacking face. The circuitry is to perform a first operation to move the leading end of the presser from the receiving face to an intermediate position beyond the extension line and before the stacking face, perform a second operation to move the leading end of the presser from the intermediate position to the stacking face, and press the two-ply sheet against the stacking face with the leading end of the presser.