EP0743572A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A device for direct electrostatic printing (DEP) comprising an intermediate image receiving member
Assignee: Agfa Gevaert NV
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Filing: 1995-05-15
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Granted: —
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Expires: 2015-05-15
Abstract
Abstract A DEP device is provided that comprises a toner delivery means (101), an intermediate image receiving member (111), a printhead structure (106), an array of printing apertures (107) in said printhead structure (106), a back electrode (105), a final image receiving member (109) and transfer means for transferring the toner image from the intermediate image receiving member to the final image receiving member, characterised in that the intermediate image receiving member has a surface coating with surface energy smaller than 40 mN/m and surface roughness Ra smaller than 3.0 µm.
Inventors
- 👤 Guido c/o Agfa-Gevaert N.V. IIE 3800 Desie
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 06:46
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/34; G03G15/344; G03G15/346; G03G15/14; G03G15/16; G03G15/1605; G03G15/162
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A DEP device that comprises : (i) toner delivery means (101) (ii) a back electrode (105) (iii) a printhead structure (106) (iv) an intermediate image receiving member (111) having an outermost surface (v) conveyer means (108) to convey a final image receiving member (109) over said intermediate image receiving member (111) (vi) transfer means (112) to transfer said toner image from said intermediate image receiving member (111) to a final image receiving member (109) (vii) means for fixing (110) said toner onto said final image receiving member, characterised in that said outermost surface of said intermediate receiving member has a surface energy lower than 40 mN/m and surface roughness Ra smaller than 3.0 µm.
Claim 2
Dependent Claim
14 words
A DEP device according to claim 1, wherein transfer means (112) are electrostatic means.
Claim 3
Dependent Claim
108 words
A DEP device that comprises : (i) toner delivery means (101), (ii) a printhead structure (106), (iii) an array of printing apertures (107) in said printhead structure (106) through which a particle flow can be electrically modulated by a control electrode (106a), (iv) an intermediate image receiving member (111), having an outermost surface (v) a back electrode (105), positioned behind said intermediate image receiving member, (vi) a final image receiving member (109), (vii) heating means (113) for tackifying said toner image characterised in that said outermost surface of said intermediate receiving member has a surface energy lower than 40 mN/m and surface roughness Ra smaller than 3.0 µm.
Claim 4
Dependent Claim
42 words
A DEP device according to claim 3, wherein said heating means (103) is located outside said intermediate image receiving means and said heating means is a radiative source that tackifies the toner image upon said intermediate receiving member from the toner side.
Claim 5
Dependent Claim
37 words
A DEP device according to any of claims 1 to 4, wherein said outermost surface of said intermediate image receiving member has a surface energy lower than 30 mN/m and said surface roughness lower than 2 µm.
Claim 6
Dependent Claim
16 words
A DEP device according to claim 5, wherein said surface energy is lower than 20 mN/m.
Claim 7
Dependent Claim
21 words
A DEP device according to any one of the preceding claims, wherein said intermediate image receiving member is a flexible belt.
Claim 8
Dependent Claim
35 words
A DEP device according to claim 7, wherein said flexible belt is a polymeric film having a Young modulus of elasticity larger than 2500 N/mm 2 , and a Tg value higher than 80 °C.
Claim 9
Dependent Claim
19 words
A DEP device according to claim 7, wherein said polymeric film is a polyester film or a polyimide film.
Claim 10
Dependent Claim
19 words
A DEP device according to claim 9, wherein said polyester film is a polyethyleneterephthalate film or a polyethylene-2-6-naphthalate film.
Claim 11
Dependent Claim
21 words
A DEP device according to claim 7, wherein said flexible belt is a polymeric film comprising a vacuum deposited metal layer.
Claim 12
Dependent Claim
16 words
A colour printer comprising at least one DEP device according to any of the preceding claims.
References Cited (Backward Citations)
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