Dynamic Sheet Accumulator Feed Path Control
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Solution Overview
Problem
Mailpiece inserter systems face challenges in reducing the conveyance feed path length due to variations in sheet length and processing requirements, leading to increased space occupancy and inefficiencies in sheet handling.
Innovation Solution
An apparatus with first, second, and auxiliary conveyances, controlled by a processor responsive to next collation signals, optimizes sheet accumulation and dispensation to minimize the conveyance feed path by selectively operating in different modes based on the location of Beginning or End-of-Collation marks on the sheets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conveyance feed path is lengthened to accommodate sheets of variable length and maintain threshold spacing between modules, then the system can handle sheets of variable length without interference, but the space occupancy and footprint of the inserter system increases
Solution Approach 1:
The patent applies dynamics by making the conveyance feed path length adjustable rather than fixed. The system can dynamically extend or reduce the feed path length based on the specific sheet length and processing requirements, allowing the same system to adapt to different job configurations without requiring a permanently large footprint.
Solution Approach 2:
The feed path is divided into multiple adjustable segments that can be independently positioned. This segmentation allows the system to extend the feed path only when needed for specific sheet lengths, rather than maintaining a continuously long path, thereby reducing the average space occupancy while maintaining adaptability.
2Area of stationary object
If the conveyance feed path is reduced to minimize footprint, then space occupancy decreases, but it becomes difficult to maintain threshold spacing to prevent downstream modules from prematurely processing sheets
Solution Approach 1:
The system performs preliminary actions by pre-positioning sheets in the feed path at calculated locations that ensure sufficient spacing before downstream modules begin processing. The controller calculates and establishes appropriate thresholds in advance, preventing premature processing without requiring excessive feed path length.
Solution Approach 2:
The system uses feedback from sensors that detect sheet position and processing status to dynamically adjust the feed path configuration and timing. This feedback mechanism ensures that downstream modules only process sheets when appropriate spacing and processing completion are confirmed, maintaining reliability even with a reduced feed path.
3Reliability
If the feed path is lengthened to allow complete processing of long sheets before downstream intervention, then processing completeness is ensured, but the conveyance path length and system footprint increase
Solution Approach 1:
The feed path length is made dynamic rather than static, allowing the system to extend the feed path only when processing long sheets that require complete upstream processing, and reduce it for shorter sheets. This dynamic adjustment ensures processing reliability for long sheets while minimizing the average conveyance path length.
Solution Approach 2:
The system changes the parameter of feed path length based on sheet length and processing requirements. By adjusting this parameter dynamically, the system maintains the reliability of complete processing for long sheets while avoiding the penalty of a permanently long feed path that would increase footprint.
Data Source
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Figure 2a
AI summary
An apparatus (14) for accumulating sheet material in a sheet handling system (10) including a first conveyance (C1), a second conveyance (C2), an auxiliary conveyance (AC) and a processor (20) to control the conveyances based upon a selected operating mode. The first conveyance (C1) receives singulated sheets and conveys the sheets to an accumulator station (AS) to produce completed collations. The second conveyance (C2) is operative to dispense completed collations from the accumulator station (AS) and, receives the completed collations from the first conveyance (C1), in one operating mode, and from the auxiliary conveyance (AC) in another operating mode when the first conveyance (C1) is inoperative. The processor (20) is responsive to a next collation signal, to control the conveyances (C1,C2,AC) based upon a selected one of the operating modes.