US4739348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording head assembly using magnetic toner and image forming apparatus using the same
Assignee: Canon Inc
•
Filing: 1987-08-28
•
Granted: 1988-04-19
•
Expires: 2007-08-28
Abstract
Abstract A recording technique for causing a magnetic toner to pass through needle-like recording electrodes by a magnetic force and forming a toner image on a recording medium by a signal voltage applied to each recording electrode uses an arrangement to allow smooth flow of the toner near the recording electrodes; namely openings are formed in a wiring member along the recording electrodes, and the toner passes through the openings.
Inventors
- 👤 Yujiro Ando
- 👤 Haruo Fujii
- 👤 Takashi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:34
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/385; B41J2/43; G; G03; G03G; G03G15/00; G03G15/22; G03G15/34; G03G15/344; G03G15/348; G03G2217/00; G03G2217/0008; G03G2217/0016
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
72 words
A recording head assembly using a magnetic toner, comprising: recording electrodes arranged in a direction perpendicular to a moving direction of a magnetic field generated by moving magnetic field generating means; and a wiring member, having openings through which toner is moved by a magnetic force of said moving magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers.
Claim 2
Dependent Claim
72 words
A recording head assembly using a magnetic toner, comprising: recording electrodes arranged in a direction perpendicular to a moving direction of a magnetic field generated by moving magnetic field generating means; and a wiring member, having openings through which toner is moved by a magnetic force of said moving magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers.
Claim 3
Dependent Claim
38 words
An assembly according to claim 1, wherein said wiring member comprises a flexible printed circuit board, said openings are formed in said flexible printed circuit board, and said conductive wires contour said openings and reach said recording electrodes.
Claim 4
Dependent Claim
22 words
An assembly according to claim 2, wherein said openings are formed in a staggered form along a direction of said recording electrodes.
Claim 5
Dependent Claim
27 words
An assembly according to claim 1, wherein said openings of said wiring member are defined by insulated conductive wires connecting said recording electrodes and said electrode drivers.
Claim 6
Dependent Claim
24 words
An assembly according to claim 1, wherein said openings are located at a downstream side of said recording electrodes along a toner feed direction.
Claim 7
Dependent Claim
24 words
An assembly according to claim 1, wherein said openings are located at an upstream side of said recording electrodes along a toner feed direction.
Claim 8
Dependent Claim
17 words
An assembly according to claim 1, wherein said recording electrodes are fixed to a nonmagnetic cylindrical sleeve.
Claim 9
Dependent Claim
17 words
An assembly according to claim 1, wherein said openings are formed at positions along said recording electrodes.
Claim 10
Dependent Claim
19 words
An assembly according to claim 1, wherein said openings are formed not to be parallel to said recording electrodes.
Claim 11
Dependent Claim
141 words
An image forming apparatus with a recording head using a magnetic toner, comprising: moving magnetic field generating means; recording electrodes arranged in a direction perpendicular to a moving direction of a magnetic field generated by said moving magnetic field generating means; a wiring member, having openings through which toner is moved by a magnetic force of said moving magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; recording electrode support means located between said recording electrodes and said moving magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said moving magnetic field generating means; and a recording member located opposite said recording electrodes, said recording member being adapted such that a toner image is formed thereon.
Claim 12
Dependent Claim
141 words
An image forming apparatus with a recording head using a magnetic toner, comprising: moving magnetic field generating means; recording electrodes arranged in a direction perpendicular to a moving direction of a magnetic field generated by said moving magnetic field generating means; a wiring member, having openings through which toner is moved by a magnetic force of said moving magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; recording electrode support means located between said recording electrodes and said moving magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said moving magnetic field generating means; and a recording member located opposite said recording electrodes, said recording member being adapted such that a toner image is formed thereon.
Claim 13
Dependent Claim
38 words
An apparatus according to claim 10, wherein said wiring member comprises a flexible printed circuit board, said openings are formed in said flexible printed circuit board, and said conductive wires contour said openings and reach said recording electrodes.
Claim 14
Dependent Claim
22 words
An apparatus according to claim 10, wherein said openings are formed in a staggered form along a direction of said recording electrodes.
Claim 15
Dependent Claim
27 words
An apparatus according to claim 10, wherein said openings of said wiring member are defined by insulated conductive wires connecting said recording electrodes and said electrode drivers.
Claim 16
Dependent Claim
24 words
An apparatus according to claim 10, wherein said openings are located at a downstream side of said recording electrodes along a toner feed direction.
Claim 17
Dependent Claim
24 words
An apparatus according to claim 10, wherein said openings are located at an upstream side of said recording electrodes along a toner feed direction.
Claim 18
Dependent Claim
45 words
An apparatus according to claim 10, wherein said moving magnetic field generating means comprises a rotary magnet roller having opposite magnetic poles alternately formed along a circumferential direction thereof, and said recording electrode support means comprises a nonmagnetic cylindrical sleeve covering said rotary magnet roller.
Claim 19
Dependent Claim
17 words
An apparatus according to claim 10, wherein said openings are formed at positions along said recording electrodes.
Claim 20
Dependent Claim
19 words
An apparatus according to claim 10, wherein said openings are formed not to be parallel to said recording electrodes.
Claim 21
Dependent Claim
141 words
A magnetic head assembly using a magnetic toner, comprising: moving magnetic field generating means having opposite magnetic poles along a circumferential direction thereof and rotated about an axis thereof; recording electrodes arranged in a direction perpendicular to a moving direction of a magnetic field of said moving magnetic field generating means; a wiring member, having openings through which toner is moved by a magnetic force of said moving magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; nonmagnetic recording electrode support means located between said recording electrodes and said moving magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said moving magnetic field generating means; and a toner vessel located below said recording electrode support means.
Claim 22
Dependent Claim
141 words
A magnetic head assembly using a magnetic toner, comprising: moving magnetic field generating means having opposite magnetic poles along a circumferential direction thereof and rotated about an axis thereof; recording electrodes arranged in a direction perpendicular to a moving direction of a magnetic field of said moving magnetic field generating means; a wiring member, having openings through which toner is moved by a magnetic force of said moving magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; nonmagnetic recording electrode support means located between said recording electrodes and said moving magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said moving magnetic field generating means; and a toner vessel located below said recording electrode support means.
Claim 23
Dependent Claim
38 words
An apparatus according to claim 19, wherein said wiring member comprises a flexible printed circuit board, said openings are formed in said flexible printed circuit board, and said conductive wires contour said openings and reach said recording electrodes.
Claim 24
Dependent Claim
22 words
An apparatus according to claim 20, wherein said openings are formed in a staggered form along a direction of said recording electrodes.
Claim 25
Dependent Claim
27 words
An apparatus according to claim 19, wherein said openings of said wiring member are defined by insulated conductive wires connecting said recording electrodes and said electrode drivers.
Claim 26
Dependent Claim
24 words
An apparatus according to claim 19, wherein said openings are located at a downstream side of said recording electrodes along a toner feed direction.
Claim 27
Dependent Claim
24 words
An apparatus according to claim 19, wherein said openings are located at an upstream side of said recording electrodes along a toner feed direction.
Claim 28
Dependent Claim
17 words
An apparatus according to claim 19, wherein said recording electrodes are fixed on said nonmagnetic cylindrical sleeve.
Claim 29
Dependent Claim
17 words
An apparatus according to claim 19, wherein said openings are formed at positions along said recording electrodes.
Claim 30
Dependent Claim
19 words
An apparatus according to claim 19, wherein said openings are formed not to be parallel to said recording electrodes.
Claim 31
Dependent Claim
53 words
A recording head assembly using a magnetic toner, comprising: recording electrodes arranged in series; and a wiring member, having openings through which toner is moved by a magnetic force of magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers.
Claim 32
Dependent Claim
53 words
A recording head assembly using a magnetic toner, comprising: recording electrodes arranged in series; and a wiring member, having openings through which toner is moved by a magnetic force of magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers.
Claim 33
Dependent Claim
123 words
An image forming apparatus with a recording head using a magnetic toner, comprising: magnetic field generating means for conveying said toner; recording electrodes arranged in series; a wiring member, having openings through which toner is moved by a magnetic force of said magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; recording electrode support means located between said recording electrodes and said magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said magnetic field generating means; and a recording member located opposite said recording electrodes, said recording member being adapted such that a toner image is formed thereon.
Claim 34
Dependent Claim
123 words
An image forming apparatus with a recording head using a magnetic toner, comprising: magnetic field generating means for conveying said toner; recording electrodes arranged in series; a wiring member, having openings through which toner is moved by a magnetic force of said magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; recording electrode support means located between said recording electrodes and said magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said magnetic field generating means; and a recording member located opposite said recording electrodes, said recording member being adapted such that a toner image is formed thereon.
Claim 35
Dependent Claim
129 words
A magnetic head assembly using a magnetic toner comprising: magnetic field generating means having opposite magnetic poles along a circumferential direction thereof; recording electrodes arranged in a direction perpendicular to a direction of a magnetic field of said magnetic field generating means; a wiring member, having openings through which toner is moved by a magnetic force of said magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; nonmagnetic recording electrode support means located between said recording electrodes and said magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said magnetic field generating means; and a toner vessel located below said recording electrode support means.
Claim 36
Dependent Claim
129 words
A magnetic head assembly using a magnetic toner comprising: magnetic field generating means having opposite magnetic poles along a circumferential direction thereof; recording electrodes arranged in a direction perpendicular to a direction of a magnetic field of said magnetic field generating means; a wiring member, having openings through which toner is moved by a magnetic force of said magnetic field generating means and conductive wires corresponding to said recording electrodes so as to electrically connect said recording electrodes with electrode drivers; nonmagnetic recording electrode support means located between said recording electrodes and said magnetic field generating means, said recording electrode support means being adapted to support said recording electrodes and being arranged along said magnetic field generating means; and a toner vessel located below said recording electrode support means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |