Sheet Accumulator Ramp and Flexible Deck for High-Speed Stacking
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Solution Overview
Problem
Conventional accumulator modules become unstable and damage paper sheets at higher speeds, such as 300 inches per second, and are limited to stacking up to eight sheets, whereas the need arises for handling up to twenty sheets efficiently.
Innovation Solution
The improved accumulator module features a stationary guide deck with parallel belts, a ramp apparatus, and an adjustable paper path guide deck, including a flexible sheet wrapped around rollers, to ensure stable high-speed stacking of multiple sheets, with dual accumulators for continuous processing and adjustable components to accommodate different sheet sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional accumulator modules operate at higher speeds (300 ips), then processing speed is improved, but paper sheets become unstable and damaged
Solution Approach 1:
The patent employs a flexible deck that can dynamically adapt to sheet accumulation, allowing the accumulator to maintain stability at high speeds. The flexible deck responds to the varying loads and speeds, preventing sheet damage while enabling operation at 300 ips.
Solution Approach 2:
The invention changes the physical parameters of the accumulator deck from rigid to flexible, allowing it to deform and adapt to high-speed operation conditions. This parameter change enables the system to handle sheets stably at higher speeds without damage.
2Productivity
If conventional accumulator modules stack more sheets (up to twenty), then productivity is improved, but stability and control deteriorate
Solution Approach 1:
The flexible deck dynamically adjusts to accommodate varying sheet quantities, allowing the accumulator to stably handle larger stacks of up to twenty sheets. The dynamic flexibility maintains control and stability even as stacking capacity increases.
Solution Approach 2:
The patent uses a flexible deck (thin film structure) that can conform to and support larger sheet accumulations. This flexible structure provides the necessary adaptability to maintain stability when stacking capacity is increased to twenty sheets.
3Productivity
If the accumulator is designed for high speed operation, then processing capability is improved, but sheet damage increases
Solution Approach 1:
The invention changes the operational parameters by introducing flexibility to the deck, allowing high-speed operation without the harmful effects of sheet damage. The flexible parameter adaptation enables the system to maintain sheet integrity at high processing speeds.
Solution Approach 2:
The flexible deck acts as a cushioning element that absorbs and mitigates the harmful effects of high-speed operation before they can damage the sheets. This beforehand cushioning protects sheets from damage while enabling high processing capability.
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 reliable high-speed stacking of up to twenty sheets without damage, maintaining stability at higher speeds and accommodating various sheet sizes, ensuring uninterrupted processing and improved processing capabilities.
Implementation Method 1
a plurality of parallel belts are positioned above the guide deck to provide a driving force for sheets on the deck
Implementation Method 2
the lower runs of the plurality of belts may be downwardly biased against the stationary deck
Implementation Method 3
an adjustable paper path guide deck, including a flexible sheet wrapped around rollers
Data Source
AI summary
An improved sheet accumulator for stacking serially fed sheets transported on a paper path includes a guide deck. Above the guide deck, a plurality of parallel belts are positioned to provide a driving force for sheets on the deck. Within the accumulator, a ramp apparatus is positioned across the paper path whereby sheets driven by the belts on an upstream portion of the accumulator deck are driven over the ramp apparatus and deposited in an accumulating region of the accumulator deck on a downstream side of the ramp apparatus. Sheets are stopped by an accumulator stop mechanism located at a downstream end of the accumulating region that prevents movement of sheets by the belts while sheets for an accumulation are being collected. When an accumulation is completed, the accumulator stop mechanism allows sheets to be transported from the accumulating region.