# US 5,705,272 A · Heating member and heat fixing apparatus using the same

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- Number: US 5,705,272 A
- Document ID: US5705272A
- Status: Granted
- Kind: A
- Application number: 08/426,178
- Filed: 1995-04-21
- Granted: 1998-01-06
- Earliest claimed: 1994-04-25
- Assignees: Canon Kabushiki Kaisha
- Inventors: Yasushi Taniguchi
- Web page: https://patentgrep.com/patent/US5705272A

## CPC

- G03G 15/2064: {combined with pressure}
- Y10T 428/30: Self-sustaining carbon mass or layer with impregnant or other layer
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A heating member having a lubricating and protective layer on the surface thereof, wherein the lubricating and protective layer is a vapor deposited layer which is made of carbon or the main component of which is carbon; and the lubricating and protective layer is formed on a separation-preventive layer for preventing separation of the lubricating and protective layer. The heating member according to the present invention for use in a heat fixing apparatus enables the heat fixing apparatus to maintain excellent wear resistance and sliding characteristics for a long time. Furthermore, the fixing speed can be raised and the size of an image that can be fixed can be enlarged, and thus the running cost can be reduced.

## Claims

### Claim 1

A heating member usable with a heater, said heating member comprising:
an insulating protective layer disposed on the surface of the heater;
a separation-preventive layer disposed on said insulating protective layer; and
a lubricating and protective layer disposed on said separation-preventive layer, said lubricating and protective layer comprising a vapor deposited layer that is made of carbon or the main component of which is carbon,
said separation-preventive layer being provided to impede separation of said lubricating and protective layer from the heater,
wherein said separation-preventive layer comprises a substance selected from the group consisting of:
(a) Si;
(b) B;
(c) elements Ti, Zr, and Hf of group IVB of the periodic table;
(d) elements V, Nb, and Ta of group VB of the periodic table;
(e) elements Cr, Mo, and W of group VIB of the periodic table;
(f) an oxide, a carbide, a nitride, a carbon nitride, a carbon oxide, and a carbonate nitride of any of said elements (a)-(e);
(g) a boride and a boron nitride of any of said elements (a) and (c)-(e); and
a compound of at least two types of said elements (a)-(e),
wherein said separation-preventive layer comprises a vapor deposited layer, and a concentration of hydrogen contained in the vapor deposited layer of said separation-preventive layer is higher than a concentration of hydrogen contained in said lubricating and protective layer.

### Claim 2 (depends on 1)

A heating member according to claim 1, wherein said vapor deposited layer comprises a layer selected from the group consisting of a hydrogenated amorphous carbon layer, a diamond-like carbon layer, a diamond layer and a hard carbon layer.

### Claim 3 (depends on 2)

A heating member according to claim 2, wherein said diamond layer comprises a polycrystal layer of diamond.

### Claim 4 (depends on 2)

A heating member according to claim 2, wherein said diamond layer comprises a mixed layer of diamond crystal, graphite crystal and amorphous carbon.

### Claim 5 (depends on 1)

A heating member according to claim 1, wherein a boundary portion between the separation-preventive layer and said lubricating and protective layer comprises a composition that continuously changes in a thickness direction of the separation-preventive layer and said lubricating and protective layer.

### Claim 6 (depends on 1)

A heating member according to claim 1, wherein said insulating protective layer comprises a glass layer.

### Claim 7

A heating member usable with a heater, said heating member comprising:
a separation-preventive layer disposed on the heater; and
a lubricating and protective layer disposed on said separation-preventive layer, said lubricating and protective layer comprising a vapor deposited layer that is made of carbon or the main component of which is carbon,
said separation-preventive layer being provided to impede separation of said lubricating and protective layer from the heater,
wherein said separation-preventive layer comprises a substance selected from the group consisting of:
(a) Si;
(b) B:
(c) elements Ti, Zr, and Hf of group IVB of the periodic table;
(d) elements V, Nb, and Ta of group VB of the periodic table;
(e) elements Cr, Mo, and W of group VIB of the periodic table;
(f) an oxide, a carbide, a nitride, a carbon nitride, a carbon oxide, and a carbonate nitride of any of said elements (a)-(e);
(g) a boride and a boron nitride of any of said elements (a) and (c)-(e); and
a compound of at least two types of said elements (a)-(3); and
wherein said separation-preventive layer comprises a vapor deposited layer, and a concentration of hydrogen contained in the vapor deposited layer of said separation-preventive layer is higher than a concentration of hydrogen contained in said lubricating and protective layer.