Mailpiece Skew Correction via Drive Roller Orientation Control
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Solution Overview
Problem
Existing mail processing systems face challenges in aligning and orienting mailpieces, particularly large flats mail, which can lead to equipment jams, improper preparation, and reduced processing efficiency, impacting downstream operations and pricing eligibility.
Innovation Solution
A system utilizing drive rollers and detectors to correct skew and change the orientation of mailpieces from landscape to portrait, ensuring proper alignment and orientation through controlled motion profiles and rotation, addressing the specific handling difficulties of flats mail and mixed mail sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mailpiece alignment and orientation systems are implemented, then processing speed and equipment reliability improve, but device complexity increases
Solution Approach 1:
The alignment system is divided into separate functional modules: skew detection subsystem, orientation detection subsystem, and correction subsystem. Each module performs a specific function (detecting skew angle, detecting orientation, applying corrective force), allowing the complex alignment task to be broken into manageable components that can be independently optimized and maintained.
Solution Approach 2:
A control system acts as an intermediary between the detection subsystems and the correction mechanism. The control system receives data from detectors, processes the information to determine required corrections, and commands the correction mechanism accordingly, thereby coordinating the complex interaction between multiple components.
2Manufacturing precision
If skew correction and orientation control are implemented, then manufacturing precision of mailpiece alignment improves, but device complexity increases
Solution Approach 1:
The system employs detectors that continuously monitor mailpiece skew and orientation, providing real-time feedback to the control system. This feedback loop enables dynamic adjustment of the correction mechanism to maintain precise alignment throughout the processing cycle, compensating for variations in mailpiece dimensions and entering conditions.
Solution Approach 2:
The system replaces complex mechanical alignment mechanisms with a combination of sensing technology and controlled correction forces. Instead of using intricate mechanical guides and positioning devices, the system uses detectors to identify misalignment and applies targeted corrective forces through the correction mechanism, simplifying the overall system while maintaining precision.
3Productivity
If high speed mail processing is implemented, then productivity increases, but mailpiece alignment and orientation deteriorate
Solution Approach 1:
The skew and orientation detectors identify misalignment conditions early in the processing sequence, before the mailpiece reaches critical processing stages. The control system calculates and applies corrections in advance, ensuring that mailpieces are properly aligned before entering printing, sorting, or sealing operations, even at high processing speeds.
Solution Approach 2:
The alignment correction mechanism operates continuously throughout the mailpiece processing cycle, maintaining proper alignment from the moment the mailpiece enters the system until it exits. This continuous correction capability ensures that high processing speeds do not compromise alignment accuracy, as adjustments are made dynamically throughout the entire process.
Data Source
AI summary
A system and method for skew correction of a mailpiece includes moving the mailpiece along a path of travel in a first orientation toward a first drive roller and a second drive roller. Control of the mailpiece is established in the first orientation by the drive rollers. A first skew correction of the mailpiece is implemented by employing the first drive roller and the second drive roller to align the mailpiece with respect to the path of travel. The first drive roller and the second drive roller may be employed to change the orientation of the stopped mailpiece from the first orientation to a second orientation with respect to the path of travel. A second skew correction may be implemented by employing the first drive roller and the second drive roller to align the mailpiece in the second orientation with respect to the path of travel.