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Drag Wheel for Multi Sheet Inserter

IP.com Disclosure Number: IPCOM000130689D
Publication Date: 2005-Nov-01
Document File: 2 page(s) / 124K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention proposes a solution for excessive sheet skew in front registered, multi-sheet inserter (MSI) feeders. In one inserter design, sheets are skewing in clockwise direction once the feed clutch is turned off due to off-center drag imbalance as sheet passes over the retard elements. The proposed method provides a drag wheel in the proper inboard-to-outboard location that "balances out" the moment created by the drag force vector from the sheet passing over the retard elements and the pull force from the take away roll (TAR) when the feed clutch has been turned off.

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Drag Wheel for Multi Sheet Inserter

This invention proposes a solution for excessive sheet skew in front registered, multi-sheet inserter (MSI) feeders.  In one inserter design, sheets are skewing in clockwise direction once the feed clutch is turned off due to off-center drag imbalance as sheet passes over the retard elements.  The proposed method provides a drag wheel in the proper inboard-to-outboard location that "balances out" the moment created by the drag force vector from the sheet passing over the retard elements and the pull force from the take away roll (TAR) when the feed clutch has been turned off.  The drag wheel is a normally spring loaded wheel that provides a normal force to impart the drag force as sheet moves forward.

The drag wheel is pulled up when a solenoid is actuated. Since the solenoid is actuated in parallel with the clutch (using the same I/O), the feed/retard function is not affected. Once the clutch & solenoid shuts down, the feed/clutch become a drag force as does this drag wheel. The location of this drag wheel is such that it is intended to balance out the pull force supplied by the Pre-Registration/TAR roller.  

This invention reduces skew by establishing a force to balance the miss-alignment of the two forces through an interim drag when the clutch turns off. It utilizes a simple link mechanism attached to spring loaded nip roller (or drag wheel). The loaded drag wheel is normally down, providing a normal force to any sheet that may be...