Media Stacking Mechanism with Adjustable Tamper for Edge Alignment
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Solution Overview
Problem
Existing printing devices face difficulties in performing finishing processes, such as stacking, when dealing with differently sized print media, as aligning all four edges can be challenging, especially when sheets have varying dimensions.
Innovation Solution
A media stacking device with a tamper system and controller that adjusts the distance of the tamper based on the size of each sheet, allowing for alignment along an edge, enabling stapling and other finishing processes by using a cantilevered surface with compliant members that adjust to accommodate different sizes, and an ejector that offsets sheets for proper alignment in an output tray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed tamper position is used for stacking, then the device structure is simple, but it cannot accommodate differently sized print media sheets
Solution Approach 1:
The tamper is made adjustable in position along the conveyance path, transforming from a fixed static component to a dynamic one that can be repositioned. The controller automatically adjusts the tamper position based on detected sheet sizes, enabling the stacking mechanism to adapt to different media dimensions while maintaining operational simplicity through automated control.
2Manufacturing precision
If all four edges of print media are aligned, then complete alignment is achieved, but it is difficult when sheets have varying dimensions
Solution Approach 1:
The system extracts the alignment requirement from all four edges and focuses only on aligning one specific edge (the leading edge). By removing the unnecessary complexity of aligning all edges and concentrating on the critical leading edge alignment, the system achieves precise stacking for differently sized sheets while simplifying the operation.
3Manufacturing precision
If sheets are ejected without offset adjustment, then the ejection process is simple, but sheets are not properly aligned in the output tray
Solution Approach 1:
The ejector is equipped with an adjustable offset mechanism that can be dynamically repositioned based on the size of the print media. The controller automatically calculates and adjusts the appropriate offset distance, enabling sheets of different sizes to be ejected and aligned correctly in the output tray without manual intervention.
Data Source
AI summary
Example implementations relate to media stacking mechanisms. In some examples, a printing device can include a stacking mechanism that includes a tamper to tamp print media positioned within the stacking mechanism, and a controller comprising instructions to: tamp a first sheet of print media received at the stacking mechanism a first distance based on a first size of the first sheet of print media, tamp a second sheet of print media received at the stacking mechanism a second distance based on the second size of the second sheet of print media, wherein the second sheet of print media is positioned over the first sheet of print media, and tamp a third sheet of print media received at the stacking mechanism the second distance when the third sheet of print media is the first size, wherein the third sheet of print media is positioned over the second sheet of print media.