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Reduce staple build-up in a stack of stapled sets

IP.com Disclosure Number: IPCOM000236338D
Publication Date: 2014-Apr-21
Document File: 2 page(s) / 858K

Publishing Venue

The IP.com Prior Art Database

Abstract

Existing cut sheet printers/finishers have poor stack quality and jams due to staple height build-up on the output stack. As sets are stapled together and ejected onto the stack, the stapled corner of the sets rises significantly higher than the other three corners of the stack due to the thickness of the staple. Consequently, incoming sheets and/or ejected sets will stub on this raised corner causing poor stack quality and/or machine shutdown. This proposal suggests an alternative process to eliminate that problem. The idea consists of image processing and workflow adjustments to enable stapling in each lead edge (LE) corner. Individual sets are structured such that the required staple location alternates from the LE inboard (IB) corner of the set to the LE outboard (OB) corner of the following set. This is accomplished by electronically rotating images of every other set by 180 degrees and using an inverter to invert the resulting set.

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Reduce staple build-up in a stack of stapled sets

Existing cut sheet printers/finishers have poor stack quality and jams due to staple height build-up on the output stack. As sets are stapled together and ejected onto the stack, the stapled corner of the sets rises significantly higher than the other three corners of the stack due to the thickness of the staple. Consequently, incoming sheets and/or ejected sets will stub on this raised corner causing poor stack quality and/or machine shutdown. This proposal suggests an alternative process to eliminate that problem. The idea consists of image processing and workflow adjustments to enable stapling in each lead edge (LE) corner. Individual sets are structured such that the required staple location alternates from the LE inboard (IB) corner of the set to the LE outboard (OB) corner of the following set.  This is accomplished by electronically rotating images of every other set by 180 degrees and using an inverter to invert the resulting set. 

Existing stapled and stacked printed sets have a known issue with staple height build-up on a stack of stapled sets (see Figure1).

Figure 1. Current staple-build up causing poor stack quality

To reduce staple build-up height, a workflow adjustment is proposed such that the images associated with every-other-set are rotated 180 degrees about the lead edge of the image. These rotated images will be printed on sheets and then sent through the output inverter to obtain Orientation “B” (se...