EP0181198A2
Expired / Lapsed
EP
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Hot melt impulse ink jet ink
Assignee: Ricoh Printing Systems America Inc
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Filing: 1985-11-05
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Granted: —
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Expires: 2005-11-05
Abstract
Abstract A hot melt ink jet ink comprises a dispersed solid pigment which is formulated in a wax, or high molecular weight fatty acid or alcohol vehicle to form a hot melt ink which is solid at room temperature but liquid at above 80°C, that is under the usual conditions of use. In a preferred embodiment, dispersed graphite in a non-evaporative oil carrier, such as mineral oil, is formulated with candelilla wax, stearic acid and/or behenic acid.
Inventors
- 👤 Theodore Michael Cooke
- 👤 An-Chung Robert Lin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 02:12
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
A hot melt ink jet ink composition for use in an impulse ink jet apparatus, comprising a solid pigment dispersed in a vehicle comprising a wax having a melting point above 65°C, or a C 18 -C 24 fatty acid or alcohol, said ink being solid at room temperature.
Claim 2
Dependent Claim
49 words
A hot melt ink jet ink composition for use in an impulse ink jet apparatus, comprising a solid pigment dispersed in a vehicle comprising a wax having a melting point above 65°C, or a C 18 -C 24 fatty acid or alcohol, said ink being solid at room temperature.
Claim 3
Dependent Claim
25 words
An ink as claimed in claim 1, wherein said solid pigment is dispersed in an oil carrier, preferably a mineral oil, compatible with said vehicle.
Claim 4
Dependent Claim
28 words
A hot melt ink as claimed in claim 1 or claim 2, wherein said solid pigment is colloidal graphite having a particle size of less than 25 microns.
Claim 5
Dependent Claim
19 words
A hot melt ink as claimed in any preceding claim, wherein said ink comprises 0.1-5 wt % of graphite.
Claim 6
Dependent Claim
16 words
A hot melt ink as claimed in any preceding claim, wherein said wax is candelilla wax.
Claim 7
Dependent Claim
19 words
A hot melt ink as claimed in any preceding claim, wherein said acid is stearic acid and/or behenic acid.
Claim 8
Dependent Claim
22 words
A hot melt ink as claimed in any preceding claim, wherein said ink includes a ketone having a melting point between 65-120°C.
Claim 9
Dependent Claim
14 words
A hot melt ink as claimed in claim 7, wherein said ketone is stearone.
Claim 10
Dependent Claim
21 words
A hot melt ink as claimed in any preceding claim and having a maximum viscosity of 14 centipoises at above 80°C.
Claim 11
Independent Claim
47 words
A method of ink jet printing comprising: (a) heating an ink defined in any preceding claim to at least 80°C; (b) discharging droplets of said heated ink towards a print substrate; and (c) allowing the ink to solidify upon impact with the substrate to form print thereon.
References Cited (Backward Citations)
No citation records indexed.
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