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Browse Prior Art Database

NIP WIDTH SETTING CAM

IP.com Disclosure Number: IPCOM000026534D
Original Publication Date: 1992-Aug-31
Included in the Prior Art Database: 2004-Apr-06
Document File: 2 page(s) / 95K

Publishing Venue

Xerox Disclosure Journal

Abstract

Currently nip width settings between fuser and pressure rolls in xerographic print engines are set using an impression formed by pressing fuser and pressure rolls together with adjusting screws. The impression, taken by offsetting an image from a sheet of paper onto a blank sheet of paper, has "fuzzy" edges, making measurements with a scale difficult and inaccurate. Nip interference measurement accuracy is necessary due to required machine part tolerances.

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XEROX DISCLOSURE JOURNAL

NIP WIDTH SETTING CAM

Karl Joseph Mueller

Proposed Classification US. C1.3551295
Int. C1. G03g 15/20

-40

10

10 70

FIG. I

FIG. 2

FIG. 3

XEROX DISCLOSURE JOURNAL - Vol. 17, No. 3 JulyiAugust 1992 247

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NIP WIDTH SETTING CAM (Cont'd)

Currently nip width settings between fuser and pressure rolls in xerographic print engines are set using an impression formed by pressing fuser and pressure rolls together with adjusting screws. The impression, taken by offsetting an image from a sheet of paper onto a blank sheet of paper, has "fuzzy" edges, making measurements with a scale difficult and inaccurate. Nip interference measurement accuracy is necessary due to required machine part tolerances.

Disclosed is a method of consistently setting nip width settings between fuser and pressure rolls using a nip engaging cam. Nip engaging cam 10 has three positions (or radii), all of which are shown in Figures 1, 2 and 3, respectively. A first position (or maximum radius), shown in Figure 1, forms an engaged nip 20 between fuser roll 30 and pressure roll 40. A second position (or minimum radius), shown in Figure 2, defines a maximum distance fuser roll 30 and pressure roll 40 are apart. A third position with a constant radius over an arc of approximately 10 degrees is positioned between the first and second cam positions as shown in Figure 3. Radius of cam 10 increases from the third position to...