Patent EP0617335A2 successfully refreshed from Google Patents.
EP0617335A2
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EP
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Direct recording method
Assignee: Array Printers AB
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Filing: 1994-03-23
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Granted: —
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Expires: 2014-03-23
Abstract
Abstract In a direct recording method, the toner supplied on a toner carrier (1) contains at least fixing resin and magnetic grains, and has an apparent density of 0.5 g/cc or more and an angle of repose of 45° or less. The magnetic flux density on the toner carrying member (1) is 0.06 T or more. A doctor blade (5) located opposite the toner carrying member (1) is used to restrain the thickness of toner layer formed on the toner carrying member (1) to 5 to 100 µm. When recording on a recording body (4), the image density is improved and fogging is eliminated.
Inventors
- 👤 Masumi C/O Hitachi Metals Ltd. Asanae
- 👤 Masahisa C/O Hitachi Metals Ltd. Ochiai
- 👤 Kouji C/O Hitachi Metals Ltd. Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:47
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/34; G03G15/344; G03G15/346; G03G9/00; G03G9/08; G03G9/0821
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A direct recording method wherein a background electrode (2) is located opposite a toner carrying member (1), which includes a sleeve (1a) provided on the outer circumference of a magnet member (1b) having a plurality of magnetic poles on its surface, a recording electrode (3) in matrix from is located between the toner carrying member (1) and the background electrode (2), wherein toner jumps out from the toner carrying member (1) and becomes attached onto a recording medium (4) disposed between the recording and background electrodes (3, 2) in response to a voltage applied to the recording electrode (3), wherein the toner supplied onto the toner carrying member (1) contains at least fixing resin and magnetic powder and has an apparent density of 0.5 g/cc or more and an angle of repose of 45° or less, and wherein the magnetic flux density on the toner carrying member (1) is 0.06 T or more.
Claim 2
Dependent Claim
152 words
A direct recording apparatus including a background electrode (2) located opposite a toner carrying member (1), which includes a sleeve (1a) provided on the outer circumference of a magnet member (1b) having a plurality of magnetic poles on its surface, a recording electrode (3) in matrix from located between the toner carrying member (1) and the background electrode (2), means for supplying toner onto the toner carrying member (1), the toner containing at least a fixing resin and magnetic powder and having an apparent density of 0.5 g/cc or more and an angle of repose of 45° or less, means for applying a voltage to the recording electrode (3) to extract toner from the toner carrying member (1) and attaching it to a recording medium (4) disposed between the recording and the background electrodes (3, 2), wherein the magnetic flux density on the toner carrying member (1) is 0.06 T or more.
Claim 3
Dependent Claim
43 words
The method of claim 1 or the apparatus of claim 2, wherein a doctor blade (5) is located opposite the toner carrying member (1) to regulate the thickness of toner layer formed on the toner carrying member (11) to 5 to 100 µm.
Claim 4
Dependent Claim
40 words
The method of claim 1 or 3 or the apparatus of claim 2 or 3, wherein the magnetic powder of the toner has an average particle size of 0.1 to 3µm and a coercive force of 40 to 400 A/cm.
Claim 5
Independent Claim
34 words
The method of any one of claims 1, 3 and 4 or the apparatus of any one of claims 2 to 4, wherein the toner contains 10 to 60 wt-% of the magnetic powder.
Claim 6
Independent Claim
56 words
The method of any one of claims 1 and 2 to 4 or the apparatus of any one of claims 2 to 5, wherein an inorganic fine powder such as SiO₂, Al₂O₃ or TiO₂ or metallic salt of stearic acid such as zinc stearate or calcium stearate is added to the outer circumference of toner particles.
References Cited (Backward Citations)
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