EP0349072A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A device for fixing or transferring and fixing powder containing thermoplastic resin on to a receiving material
Assignee: Canon Production Printing Netherlands BV
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Filing: 1989-06-23
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Granted: —
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Expires: 2009-06-23
Abstract
Abstract A device for fixing or transferring and fixing a powder containing thermoplastic resin on to a receiving material under the influence of pressure and heat, in which device the fixing member in pressure contact with the powder during the fixing of the powder image is provided with an outer covering consisting mainly of silicone rubber. The silicone rubber is the reaction product of polyorganosiloxane bearing Si-H groups and polyorganosiloxane which bears Si-(CH=CH₂) groups and which on average contains between 40 and 1000 monomeric units per polymer chain, bears 1.5-4 terminal vinyl groups, bears at most one non-terminal vinyl group per 80 monomeric units and contains at most 2% Si atoms in the form of SiO3/2 or SiO4/2 units. The thickness of the silicone rubber covering is preferably less than 500 micrometers.
Inventors
- 👤 Bauke Schoustra
- 👤 Johannes Hendricus Antonius Kuiper
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 17:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2053; G03G15/2057; C; C08; C08L; C08L83/00; C08L83/04; E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F9/2221; E02F9/2225; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20; G03G2215/00; G03G2215/20; G03G2215/2003; G03G2215/2048; G03G2215/2051; G03G2215/2054; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
A device for fixing or transferring and fixing a powder containing a thermoplastic resin on to a receiving support under the influence of pressure and heat, comprising co-operating fixing members which form a pressure zone in which the powder is pressed against the receiving material and heating means for heating at least one of the fixing members, at least that fixing member which in the pressure zone is in contact with the thermoplastic resin being provided with an outer covering of silicone rubber, characterised in that the outer covering consists mainly of silicone rubber obtained by reaction of polyorganosiloxane bearing Si-H groups with polyorganosiloxane which bears Si-(CH=CH₂) groups and which contains on average between 40 and 1000 monomeric units per polymer chain, bears 1.5-4 terminal vinyl groups, bears at most one non-terminal vinyl group per 80 monomeric units and contains at most 2% Si atoms in the form of SiO3/2 of SiO4/2 units.
Claim 2
Independent Claim
153 words
A device for fixing or transferring and fixing a powder containing a thermoplastic resin on to a receiving support under the influence of pressure and heat, comprising co-operating fixing members which form a pressure zone in which the powder is pressed against the receiving material and heating means for heating at least one of the fixing members, at least that fixing member which in the pressure zone is in contact with the thermoplastic resin being provided with an outer covering of silicone rubber, characterised in that the outer covering consists mainly of silicone rubber obtained by reaction of polyorganosiloxane bearing Si-H groups with polyorganosiloxane which bears Si-(CH=CH₂) groups and which contains on average between 40 and 1000 monomeric units per polymer chain, bears 1.5-4 terminal vinyl groups, bears at most one non-terminal vinyl group per 80 monomeric units and contains at most 2% Si atoms in the form of SiO3/2 of SiO4/2 units.
Claim 3
Dependent Claim
28 words
A device according to claim 1, characterised in that the silicone rubber in the outer covering is derived from polyorganosiloxane in which all the Si-(CH=CH₂) groups are terminal.
Claim 4
Dependent Claim
51 words
A device according to claim 2, characterised in that the silicone rubber is derived from polyorganosiloxane bearing vinyl groups in accordance with the formula: where R denotes a conventional organic radical more particularly a methyl group, and X is an integer between 100 and 450, more particularly between 250 and 350.
Claim 5
Independent Claim
36 words
A device according to one or more of the preceding claims, characterised in that the silicone rubber is derived from polyorganosiloxane which bears Si-H groups and which contains between 6000 and 11000 m.mol/kg reactive Si-H groups.
Claim 6
Dependent Claim
62 words
A device according to claim 4, characterised in that the silicone rubber is derived from polyorganosiloxane which bears Si -H groups, in accordance with the general formula: where R denotes a conventional organic radical, more particularly a methyl group, the total m + n is between 5 and 40 and the ratio m : n is between 1.5 - 2.5 : 1.
Claim 7
Independent Claim
40 words
A device according to one or more of the preceding claims, characterised in that the silicone rubber is obtained from a mixture of the said polyorganosiloxanes in which Si-H groups are present in excess with respect to the Si(CH=CH₂) groups.
Claim 8
Independent Claim
27 words
A device according to one or more of the preceding claims, characterised in that the outer covering contains at least 80% by weight of said silicone rubber.
Claim 9
Independent Claim
25 words
A device according to one or more of the preceding claims, characterised in that the outer covering has an average thickness of 500 micrometers maximum.
Claim 10
Independent Claim
91 words
A device for forming fixed images on a receiving material comprising a fixing member provided with an outer covering of silicone rubber, means for providing the outer covering with a powder image by means of a powder which contains thermoplastic resin, means for bringing a receiving material into pressure contact with the fixing member and heating means for softening the powder image, characterised in that the silicone rubber on the fixing member consists mainly of a silicone rubber as defined in one or more of the preceding claims 1 to 6.
Claim 11
Dependent Claim
41 words
A device according to claim 9, characterised in that the fixing member bears a silicone rubber outer covering obtained from a mixture of polyorganosiloxanes in which Si-H groups are present in a 40 to 60% excess with respect to the Si(CH=CH₂)groups.
References Cited (Backward Citations)
GB2081646A
Cited
EP0062408A1
Cited
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