Browse Prior Art Database

LOW STRESS STRIPPER FINGERS

IP.com Disclosure Number: IPCOM000024055D
Original Publication Date: 1979-Aug-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 209K

Publishing Venue

Xerox Disclosure Journal

Abstract

A stripper finger 10 for detaching copy sheets from a heated fuser roll 12 is disclosed. The heated fuser roll comprises a resilient elastomeric layer 14 affixed to a rigid heat conductive cylinder 16. A conventional heat source 18 is supported internally of the cylinder for elevating the surface temperature of the roll. Two or more stripper fingers 20 are provided for detaching copy sheets from the roll 12, which sheets tend to be tacked thereto by thermoplastic particles forming the images on the copy sheets. The stripper fingers are pivotally mounted such that the attack angle of their tips 22 are approximately tangent to the roll surface. In order to alleviate stress concentrations at the corners of the finger-stip due to compression of the elastomeric layer, a rounded tip is provided by machining. To keep the tip from becoming a weak cantilever, a machining technique is employed which brings the tip to a point at an angle of approximately 45┬░withrespect to the bottom surface of the tip.

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XEROX DISCLOSURE JOURNAL

LOW STRESS STRIPPER FINGERS ProposedDexter Dyer Classification

U.S. Cl. 271/174

mt. Cl, B65h 29/54

/5

18

A stripper finger 10 for detaching copy sheets from a heated fuser roll 12 is disclosed. The heated fuser roll comprises a resilient elastomeric layer 14 affixed to a rigid heat conductive cylinder 16. A conventional heat source 18 is supported

internally of the cylinder for elevating the surface temperature of the roll. Two or more stripper fingers 20 are provided for detaching copy sheets from the roll 12, which sheets tend to be tacked thereto by thermoplastic particles forming the images on the copy sheets. The stripper fingers are pivotally mounted such that

the attack angle of their tips 22 are approximately tangent to the roll surface. In order to alleviate stress concentrations at the corners of the finger~stip due to compression of the elastomeric layer, a rounded tip is provided by machining. To keep the tip from becoming a weak cantilever, a machining technique is employed

which brings the tip to a point at an angle of approximately 45°withrespect to the bottom surface of the tip.

14

Volume 4 Number 4 duly/August 1979 '~65

FIG. I FIG, 2

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                  XEROX DISCLOSURE IOURNAL 466 Volume 4 Number 4 duly/August 1979

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