Right Angle Turn Module for High-Speed Sheet Merging
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Solution Overview
Problem
Existing right angle turn modules in inserter systems require large gaps between sheets to avoid collisions, leading to reduced processing speed and increased costs, complexity, and reliability issues when trying to achieve high-speed processing.
Innovation Solution
A right angle turn module design that transports sheets in a side-by-side arrangement, using a stop arrangement and actuated second transport to switch to serial orientation, with a horizontal guide plate and overhead belts to prevent collisions, allowing for high-speed processing of up to 72,000 sheets per hour without the need for two distinct paper paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large gaps are maintained between sheets to avoid collisions in existing right angle turn modules, then collision avoidance is achieved, but processing speed and throughput are reduced
Solution Approach 1:
The sheet transport path is segmented into distinct zones: a first transport path for side-by-side sheets and a second transport path for serial sheets. The transitional member divides the path so that sheets can be separated into different spatial zones during the right angle turn, allowing continuous high-speed processing without collisions by treating sheet paths as separable segments rather than a single continuous flow
Solution Approach 2:
The invention transitions sheets from a two-dimensional side-by-side arrangement to a one-dimensional serial arrangement by introducing a right angle turn. The transitional member with its elevated upper surface creates a three-dimensional path where sheets can pass at different vertical levels during the orientation change, enabling collision-free high-speed processing through dimensional transformation
2Productivity
If high-speed processing is attempted in existing modules, then processing speed increases, but sheet collisions occur due to insufficient gap space
Solution Approach 1:
The system dynamically adjusts sheet orientation and position during transport. The actuated second transport selectively engages sheets after they pass over the guide plate, creating a dynamic switching mechanism that adapts to high-speed flow conditions. This dynamic control allows the system to maintain high processing speeds while preventing collisions through real-time sheet position management
Solution Approach 2:
The horizontal guide plate serves as an intermediary element between the first and second transport paths. It mediates the transition by providing a surface that sheets pass over during the right angle turn, ensuring controlled separation and preventing direct contact between sheets from different paths, thus enabling high-speed collision-free processing
3Reliability
If two distinct paper paths are used to achieve high-speed processing, then collision avoidance is improved, but device complexity and cost increase
Solution Approach 1:
The invention merges two separate paper path systems into a single integrated right angle turn module. The first transport path and second transport path are combined into one continuous structure with a shared transitional member, eliminating the need for duplicate drive elements and complex switching mechanisms while maintaining collision-free high-speed processing
Solution Approach 2:
The single set of drive elements in the first transport path serves multiple functions: it transports sheets side-by-side in the initial path and, through the transitional member, enables their redirection into serial arrangement. This multi-functional design eliminates the need for separate drive systems for each path, reducing complexity while achieving the collision avoidance benefits of dual paths
Data Source
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AI summary
A right angle turn module having a first transport that transports side-by-side sheets in a first direction. Downstream of the first sheet transport a barrier (42) is positioned to stop the sheets. A sensor device (62) detects an arrival of the side-by-side sheets at the barrier (42). Then, an actuated second sheet transport, triggered by the sensor device (62), is activated to transport the sheets serially in a second direction substantially perpendicular to the first direction. In a preferred embodiment, a horizontal guide plate (16) is positioned at a downstream end of the first sheet transport. With the guide plate (16) thus positioned, a sheet traveling in the first direction and a sheet traveling in the second direction can temporarily be overlapped and a collision can be avoided. In a further preferred embodiment, the first transport further comprises overhead belts to urge the side-by-side pair of sheets in the first direction. The overhead belts may be tensioned so as to slip over a top surface of the side-by-side pair of sheets while urging the pair of sheets towards the stop arrangement.