US5512409A — Fusing method and system with hydrofluoroelastome…

Claim 1

Independent Claim 240 words

The method of fusing thermoplastic resin toner images to a substrate comprising providing a heated thermally stable hydrofluoroelastomer fusing surface at elevated temperature, said hydrofluoroelastomer fusing surface having been prepared in the absence of anchoring sites for a functional release agent of heavy metals, heavy metal oxides, or other heavy metal compounds, forming a film of a fluid release agent on said elastomer surface comprising a fluid amino functional oil having the formula: ##STR6## where 50≦n≦200, p is 1 to 5, and R 1 , R 2 and R 3 are selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms, R 4 is selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms and a polyorganosiloxane chain having 1 to 100 diorganosiloxy repeat units, and R 5 is selected from the group consisting of hydrogen, alkyl and arylalkyl radicals having 1 to 18 carbon atoms, said oil having sufficient amino functionality per active molecule to interact with said hydrofluoroelastomer fusing surface in the absence of a heavy metal, heavy metal oxide or other heavy metal compounds anchoring sites to provide an interfacial barrier layer to said toner and a low surface energy film to release said toner from said surface; contacting the toner image on the substrate with the filmed heated elastomer surface to fuse said toner image to said substrate and permitting said toner to cool.

Claim 2

Independent Claim 240 words

The method of fusing thermoplastic resin toner images to a substrate comprising providing a heated thermally stable hydrofluoroelastomer fusing surface at elevated temperature, said hydrofluoroelastomer fusing surface having been prepared in the absence of anchoring sites for a functional release agent of heavy metals, heavy metal oxides, or other heavy metal compounds, forming a film of a fluid release agent on said elastomer surface comprising a fluid amino functional oil having the formula: ##STR6## where 50≦n≦200, p is 1 to 5, and R 1 , R 2 and R 3 are selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms, R 4 is selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms and a polyorganosiloxane chain having 1 to 100 diorganosiloxy repeat units, and R 5 is selected from the group consisting of hydrogen, alkyl and arylalkyl radicals having 1 to 18 carbon atoms, said oil having sufficient amino functionality per active molecule to interact with said hydrofluoroelastomer fusing surface in the absence of a heavy metal, heavy metal oxide or other heavy metal compounds anchoring sites to provide an interfacial barrier layer to said toner and a low surface energy film to release said toner from said surface; contacting the toner image on the substrate with the filmed heated elastomer surface to fuse said toner image to said substrate and permitting said toner to cool.

Claim 3

Dependent Claim 42 words

The method of claim 1 wherein at least 85% of the polyorgano amino functional siloxane chains have p equal to 1 and the ##STR7## groups are situated at random along the chain, said oil having a predominantly monoamino functionality per active molecule.

Claim 4

Dependent Claim 16 words

The method of claim 1 wherein said amino functionality is provided by aminopropyl methyl siloxy groups.

Claim 5

Dependent Claim 24 words

The method of claim 1 wherein said amino functional oil remains functionally fluid at temperatures of from about 30° F. to about 450° F.

Claim 6

Dependent Claim 24 words

The method of claim 1 wherein said amino functional oil has a viscosity of from about 100 to about 1000 centipoise at 20° C.

Claim 7

Dependent Claim 34 words

The method of claim 1 wherein said amino functional oil is present with nonfunctional organosiloxane oil in an amount of from about 0.01 to 0.30 mole percent of the total number of organosiloxy groups.

Claim 8

Dependent Claim 25 words

The method of claim 1 wherein said amino functional oil is prepared in a batch process in the absence of subsequent dilution with nonfunctional oil.

Claim 9

Dependent Claim 240 words

A heated pressure fusing system for fusing thermoplastic toner in an electrostatographic printing apparatus in which a heated fuser member and a backup pressure member define a fusing arc to fuse toner images to a substrate, said fuser member comprising a thermally stable hydrofluoroelastomer fusing surface said FKM hydrofluoroelastomer fusing surface having been prepared in the absence of anchoring sites for a release agent of heavy metals, heavy metal oxides, or other heavy metal compounds, means to deliver a release agent to said surface, said release agent comprising a fluid amino functional oil having the formula: ##STR8## where 50≦n≦200, p is 1 to 5, and R 1 , R 2 and R 3 are selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms, R 4 is selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms and a polyorganosiloxane chain having 1 to 100 diorganosiloxy repeat units, and R 5 is selected from the group consisting of hydrogen, alkyl and arylalkyl radicals having 1 to 18 carbon atoms, said oil having sufficient amino functionality per active molecule to interact with said hydrofluoroelastomer fusing surface in the absence of anchoring sites for said release agent of heavy metals, heavy metal oxides or other heavy metal compounds to provide an interfacial barrier layer to said toner and a low surface energy film to release said toner from said surface.

Claim 10

Dependent Claim 240 words

A heated pressure fusing system for fusing thermoplastic toner in an electrostatographic printing apparatus in which a heated fuser member and a backup pressure member define a fusing arc to fuse toner images to a substrate, said fuser member comprising a thermally stable hydrofluoroelastomer fusing surface said FKM hydrofluoroelastomer fusing surface having been prepared in the absence of anchoring sites for a release agent of heavy metals, heavy metal oxides, or other heavy metal compounds, means to deliver a release agent to said surface, said release agent comprising a fluid amino functional oil having the formula: ##STR8## where 50≦n≦200, p is 1 to 5, and R 1 , R 2 and R 3 are selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms, R 4 is selected from the group consisting of alkyl and arylalkyl radicals having 1 to 18 carbon atoms and a polyorganosiloxane chain having 1 to 100 diorganosiloxy repeat units, and R 5 is selected from the group consisting of hydrogen, alkyl and arylalkyl radicals having 1 to 18 carbon atoms, said oil having sufficient amino functionality per active molecule to interact with said hydrofluoroelastomer fusing surface in the absence of anchoring sites for said release agent of heavy metals, heavy metal oxides or other heavy metal compounds to provide an interfacial barrier layer to said toner and a low surface energy film to release said toner from said surface.

Claim 11

Dependent Claim 43 words

The fusing system of claim 7 wherein at least 85% of the polyorgano amino functional siloxane chains have p equal to 1 and the ##STR9## groups are situated at random along the chain, said oil having a predominantly monoamino functionality per active molecule.

Claim 12

Dependent Claim 17 words

The fusing system of claim 8 wherein said amino functionality is provided by aminopropyl methyl siloxy groups.

Claim 13

Dependent Claim 22 words

The fusing system of claim 8 wherein said amino functional oil remains functionally fluid at temperatures up to at least 400° F.

Claim 14

Dependent Claim 25 words

The fusing system of claim 8 wherein said amino functional oil has a viscosity of from about 100 to about 1000 centipoise at 20° C.

Claim 15

Dependent Claim 26 words

The fusing system of claim 8 wherein said amino functional oil is prepared in a batch process in the absence of subsequent dilution with nonfunctional oil.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1999-04-30	1999-10-30	2000-04-30	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2003-04-30	2003-10-30	2004-04-30	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2007-04-30	2007-10-30	2008-04-30	$7700.00	Window Closed / Lapsed

Fusing method and system with hydrofluoroelastomers fuser member for use with amino functional silicone oils

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