US5477250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device employing multicolor toner particles for generating multicolor images
Assignee: Array Printers AB
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Filing: 1993-11-15
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Granted: 1995-12-19
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Expires: 2013-11-15
Abstract
Abstract Device for generating multicolor images which employs a latent electric charge pattern and development of this on an information carrier (21) using toner particles (16) of different colors. Separate developers (10-13) are used for each color. Each developer (10-13) is individually provided with a toner carrier, preferably a conductive developer roll (14) and a back electrode (23) which cooperates with the developer roll by attraction forces. An electrode unit (29) is arranged between the conductive developer roll and the back electrode 23. The electrode unit (29) includes at least one electrode layer/direction (22), essentially including relative parallel electrodes, which are common for all developers (10-13), and a plurality of apertures (27). The apertures (27) are opened and closed respectively by signals from at least one driving device (25). The toner carriers (14) and/or the back electrode/electrodes (23) is/are arranged to have applied a potential difference with respect to the colour selection, which results in attraction forces between the toner carrier (14) and the back electrode (23). A possible second electrode layer/direction (33), which includes electrodes (33) which are essentially parallel and formed at an angle to the first electrode layer (22), is provided to be controlled individually by at least a second driving device (31).
Inventors
- 👤 Ove Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:27
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/34; G03G15/344; G03G15/346; B; B41; B41J; B41J2/00; B41J2/385; B41J2/41; B41J2/415; B41J2/4155; G03G15/01; G03G15/0142; G03G15/0178; G03G15/0194; G03G2215/00; G03G2215/01; G03G2215/0167; G03G2215/0187; G03G2217/00; G03G2217/0008; G03G2217/0025
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
205 words
Device for generating multicolour images, by means of a latent electric charge pattern and development of this on an information carrier by means of toner particles of different colours, by using separate developers for each colour, which developers are individually provided with a toner carrier, preferably a conductive developer roller and at least one back electrode cooperative with this by means of attraction forces, and an electrode means arranged between these, having pervious apertures, which are opened and closed respectively by means of signals from at least a first driving device, characterized therein, that the electrode means includes at least a first electrode layer/direction, essentially including relative parallel individual electrodes, which are common for all developers, that the toner carriers and the back electrode are arranged to have applied a potential difference with respect to a colour selection, which results in attraction forces between the toner carrier and the back electrode, and that, optionally, the electrode means includes a second electrode layer/direction, which includes individual electrodes which are essentially parallel and formed at an angle to the first electrode layer/direction, and which are to be controlled individually by means of signals from at least a second driving device to open and close the pervious apertures.
Claim 2
Dependent Claim
205 words
Device for generating multicolour images, by means of a latent electric charge pattern and development of this on an information carrier by means of toner particles of different colours, by using separate developers for each colour, which developers are individually provided with a toner carrier, preferably a conductive developer roller and at least one back electrode cooperative with this by means of attraction forces, and an electrode means arranged between these, having pervious apertures, which are opened and closed respectively by means of signals from at least a first driving device, characterized therein, that the electrode means includes at least a first electrode layer/direction, essentially including relative parallel individual electrodes, which are common for all developers, that the toner carriers and the back electrode are arranged to have applied a potential difference with respect to a colour selection, which results in attraction forces between the toner carrier and the back electrode, and that, optionally, the electrode means includes a second electrode layer/direction, which includes individual electrodes which are essentially parallel and formed at an angle to the first electrode layer/direction, and which are to be controlled individually by means of signals from at least a second driving device to open and close the pervious apertures.
Claim 3
Dependent Claim
21 words
Device according to claim 1, characterized therein, that each toner carrier is arranged to be connected separately to a voltage supply.
Claim 4
Dependent Claim
19 words
Device according to claim 1, characterized therein, that all toner carriers are arranged to have applied the same potential.
Claim 5
Dependent Claim
56 words
Device according to claim 1, characterized therein, that the potential of each individual electrode of the first electrode layer/direction and the second electrode layer/direction is selectively controllable, by means of said first and second driving devices for varying the size of the pervious apertures according to the signals generated by the first and second driving devices.
Claim 6
Dependent Claim
28 words
Device according to claim 1, characterized therein, that the electrode means are flexibly suspended by means of suspensions means relative to the toner carrier and the back electrode.
Claim 7
Dependent Claim
17 words
Device according to claim 1, characterized therein, that the back electrode is arranged as a movable belt.
Claim 8
Dependent Claim
42 words
Device according to claim 6, characterized therein, that said belt is provided with pervious holes communicating with a vacuum chamber connected to a vacuum producing means, and that the holes are arranged to suck and hold the information carrier on the belt.
Claim 9
Dependent Claim
22 words
Device according to claim 7, characterized therein, that said belt is arranged with cleaning means, which cleans the electrode means by brushing.
Claim 10
Dependent Claim
15 words
Device according to claim 8, characterized therein, that the cleaning means consist of flock pads.
Claim 11
Dependent Claim
19 words
Device according to claim 8, characterized therein, that cleaning means are provided for cleaning waste toner from said belt.
Claim 12
Dependent Claim
22 words
Device according to claim 7, characterized therein, that said belt is arranged with cleaning means which cleans the electrode means by sucking.
Claim 13
Dependent Claim
25 words
Device according to claim 7, characterized therein, that said belt is arranged with cleaning means which cleans the electrode means by supplying it with charges.
Claim 14
Dependent Claim
29 words
Device according to claim 7, characterized therein, that said belt is arranged with cleaning means which cleans the electrode means by brushing and sucking and supplying it with charges.
Claim 15
Dependent Claim
25 words
Device according to claim 1, characterized therein, that the developers are arranged in a carrier member, having spacer means, for accurate mounting of the developers.
Claim 16
Dependent Claim
14 words
Device according to claim 1, characterized therein, that the toner carrier includes gas flow.
Claim 17
Dependent Claim
12 words
Device according to claim 15, characterized therein, that the gas is air.
Claim 18
Dependent Claim
17 words
Device according to claim 1, characterized therein, that the number of apertures of the electrode means varies.
Claim 19
Dependent Claim
27 words
Device according to claim 1, characterized therein, that the electrode means are extended by means of suspension means relative to the toner carrier and the back electrode.
Claim 20
Dependent Claim
30 words
Device according to claim 1, characterized therein, that the electrode means are flexibly suspended and extended by means of suspension means relative to the toner carrier and the back electrode.
Claim 21
Dependent Claim
18 words
Device according to claim 1, characterized therein, that the size of the apertures of the electrode means varies.
Claim 22
Dependent Claim
23 words
Device according to claim 1, characterized therein, that the number of apertures and the size of the apertures of the electrode means varies.
Claim 23
Dependent Claim
215 words
Device for generating multicolour images, by means of a latent electric charge pattern and development of this on an information carrier by means of toner particles of different colours, by using separate developers for each colour, which developers are individually provided with a toner carrier in the form of a conductive developer roller, the information carrier being arranged as a back electrode which is cooperative with the toner carrier by means of attraction forces, and an electrode means arranged between these, having pervious apertures, which are opened and closed respectively by means of signals from at least a first driving device, characterized therein, that the electrode means includes at least a first electrode layer/direction, essentially including relative parallel individual electrodes, which are common for all developers, that the toner carriers and the information carrier are arranged to have applied a potential difference with respect to a colour selection, which results in attraction forces between the toner carrier and the information carrier, and that, optionally, the electrode means includes a second electrode layer/direction, which includes individual electrodes which are essentially parallel and formed at an angle to the first electrode layer/direction, and which are to be controlled individually by means of signals from at least a second driving device to open and close the pervious apertures.
Claim 24
Dependent Claim
215 words
Device for generating multicolour images, by means of a latent electric charge pattern and development of this on an information carrier by means of toner particles of different colours, by using separate developers for each colour, which developers are individually provided with a toner carrier in the form of a conductive developer roller, the information carrier being arranged as a back electrode which is cooperative with the toner carrier by means of attraction forces, and an electrode means arranged between these, having pervious apertures, which are opened and closed respectively by means of signals from at least a first driving device, characterized therein, that the electrode means includes at least a first electrode layer/direction, essentially including relative parallel individual electrodes, which are common for all developers, that the toner carriers and the information carrier are arranged to have applied a potential difference with respect to a colour selection, which results in attraction forces between the toner carrier and the information carrier, and that, optionally, the electrode means includes a second electrode layer/direction, which includes individual electrodes which are essentially parallel and formed at an angle to the first electrode layer/direction, and which are to be controlled individually by means of signals from at least a second driving device to open and close the pervious apertures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-18 | 1999-06-19 | 1999-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-18 | 2003-06-19 | 2003-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-18 | 2007-06-19 | 2007-12-19 | $7700.00 | Window Closed / Lapsed |