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Eliminating unwanted drag in a media path

IP.com Disclosure Number: IPCOM000184047D
Publication Date: 2009-Jun-09
Document File: 3 page(s) / 90K

Publishing Venue

The IP.com Prior Art Database

Abstract

The idea describes a movable portion of the media path baffle which would move into a position that would prevent the media from dragging on the compliant rolls. The idea is not limited to this context, but will be described applied to a media path system where the lower (driven) roll is in the fixed position and upper idler roll is lifted to release the nip on the media. In concert with the lifting of the idler roll, a feature of the lower media path baffle would be lifted to a position slightly higher than the position of the fixed driven roll. This feature would be designed to impart minimal drag on the media such that the system registering the media will experience lower forces than if the media was dragging on the driven roll.

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Eliminating unwanted drag in a media path

This idea improves the transportation of media (paper or other material) in a printer or imaging device that moves cut sheets through a media path in the device.

The process of registering media in a media path, involves opening some nips so that the media remains captured in only one nip at any one point in time.  This allows the media to be registered without buckling.  To open a nip, normally the idler roll is lifted, leaving the driven roll in the media path. This driven roll is normally compliant (turns only when driven) and even when the idler roll is lifted, the media drags on the driven rolls causing an additional load on the registration system.  This can also cause possible damage to the media, possible damage to an image in the case of handling printed media, and possible buckling of the media. It is possible to move the driven roll out of the paper path, but it is a very complex operation.

The idea describes a movable portion of the media path baffle which would move into a position that would prevent the media from dragging on the compliant rolls. The idea is not limited to this context, but will be described applied to a media path system where the lower (driven) roll is in the fixed position and upper idler roll is lifted to release the nip on the media. In concert with the lifting of the idler roll, a feature of the lower media path baffle would be lifted to a position slightly higher than the position of the fixed driven roll. This feature would be designed to impart minimal drag on the media such that the system registering the media will experience lower forces than if the media was dragging...