US4825245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex printing module for an electrographic printer
Assignee: Intel Corp
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Filing: 1987-11-02
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Granted: 1989-04-25
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Expires: 2007-11-02
Abstract
Abstract An electrographic printing apparatus capable of duplex printing comprises a housing, a source of copy material and an output tray for receiving such copy material after it is imprinted, and a photoconductive member for storing a latent electrostatic image of the information to be imprinted. The printer/copier has first and second paper paths located near the top of the housing so that access to the paper may be achieved from the top of the housing. A photoconductive member is located below the first paper path and comes into contact with a first side of the paper from below in a transfer zone located in the first paper path to imprint the first side of the paper. The second paper path is operative to receive paper after it has passed through the transfer zone and information has been transferred to the first side of the paper. As the paper travels along the second paper path, it is turned over and then returned to the first paper path prior to the transfer zone so that the second side of the paper is imprinted from below by the photoconductive member. The invention also encompasses a duplexing unit which is attachable as a module to the body of an electrographic printer to convert it from a simplex printer to a duplex printer.
Inventors
- 👤 Kensuke Fukae
- 👤 Shozo Kaieda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:57
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; B; B41; B41J; B41J13/00; B41J13/0009; B41J13/0045; B41J3/00; B41J3/60; G03G15/23; G03G15/231; G03G15/232; G03G15/234; G06; G06K; G06K15/00; G06K15/02; G06K15/16; G03G2215/00; G03G2215/00362; G03G2215/00535; G03G2215/00556; G03G2215/00586
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
130 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region, and an area of reversion, said first region forming a portion of a first paper path along which said sheet of paper is imprinted on a first side, said second region and area of reversion forming a portion of a second paper path, said second paper path being operative to receive said sheet of paper from said first paper path, to turn said paper over, and to return said paper to said first paper path to imprint said paper on a second side, and means for attaching said unit on top of an electographic printing apparatus.
Claim 2
Dependent Claim
130 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region, and an area of reversion, said first region forming a portion of a first paper path along which said sheet of paper is imprinted on a first side, said second region and area of reversion forming a portion of a second paper path, said second paper path being operative to receive said sheet of paper from said first paper path, to turn said paper over, and to return said paper to said first paper path to imprint said paper on a second side, and means for attaching said unit on top of an electographic printing apparatus.
Claim 3
Dependent Claim
22 words
The duplexing unit of claim 1 further comprising paper transport means for guiding said sheet of paper along said second paper path.
Claim 4
Dependent Claim
13 words
The duplexing unit of claim 1 wherein said attachment means comprises hinging means.
Claim 5
Dependent Claim
17 words
The duplexing unit of claim 3 wherein said hinging means provides access to said first paper path.
Claim 6
Dependent Claim
20 words
The duplexing unit of claim 1 further comprising vacuum transport means for transporting said sheet along said first paper path.
Claim 7
Dependent Claim
17 words
The duplexing unit of claim 1 further comprising alignment correction means located along said second paper path.
Claim 8
Dependent Claim
29 words
The duplexing unit of claim 1 further comprising a top lid located above said second paper path, said top lid providing access to said second paper path from above.
Claim 9
Dependent Claim
25 words
The duplexing unit of claim 1 wherein said first region comprises an upper region and said second region comprises a lower region of said unit.
Claim 10
Dependent Claim
126 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising, a first region, a second region, and an area of reversion, said first region, second region, and area of reversion comprising a paper path, said paper path comprising a loop and a branch extending therefrom, paper transport means for passing said sheet along said loop wherein said sheet is imprinted on a first side, for turning said sheet over, for passing said sheet into said branch, and for returning said sheet to said loop a second time for imprinting a second side of said sheet, and means for attaching said unit on top of an electrographic printing apparatus.
Claim 11
Dependent Claim
126 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising, a first region, a second region, and an area of reversion, said first region, second region, and area of reversion comprising a paper path, said paper path comprising a loop and a branch extending therefrom, paper transport means for passing said sheet along said loop wherein said sheet is imprinted on a first side, for turning said sheet over, for passing said sheet into said branch, and for returning said sheet to said loop a second time for imprinting a second side of said sheet, and means for attaching said unit on top of an electrographic printing apparatus.
Claim 12
Dependent Claim
20 words
The duplexing unit of claim 9 wherein said attachment means comprises hinging means for providing access to said paper path.
Claim 13
Dependent Claim
25 words
The duplexing unit of claim 9 wherein said first region comprises an upper region and said second region comprises a lower region of said unit.
Claim 14
Dependent Claim
15 words
The duplexing unit of claim 9 wherein said paper transport means includes vacuum transport means.
Claim 15
Dependent Claim
11 words
The duplexing unit of claim 9 further comprising alignment correction means.
Claim 16
Dependent Claim
27 words
The duplexing unit of claim 9 further comprising a top lid located above said paper path, said top lid providing access to said paper path from above.
Claim 17
Dependent Claim
140 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region, and an area of reversion, said first region forming a portion of a first paper path along which said sheet of paper is imprinted on a first side, said second region and area of reversion forming a portion of a second paper path, said second paper path being operative to receive said sheet of paper from said first paper path, to turn said paper over, and to return said paper to said first paper path to imprint said paper on a second side, and alignment correction means located along said second paper path, said duplexing unit being attachable as a module to an electrographic printing apparatus.
Claim 18
Dependent Claim
140 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region, and an area of reversion, said first region forming a portion of a first paper path along which said sheet of paper is imprinted on a first side, said second region and area of reversion forming a portion of a second paper path, said second paper path being operative to receive said sheet of paper from said first paper path, to turn said paper over, and to return said paper to said first paper path to imprint said paper on a second side, and alignment correction means located along said second paper path, said duplexing unit being attachable as a module to an electrographic printing apparatus.
Claim 19
Dependent Claim
153 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region, and an area of reversion, said first region forming a portion of a first paper path along which said sheet of paper is imprinted on a first side, said second region and area of reversion forming a portion of a second paper path, said second paper path being operative to receive said sheet of paper from said first paper path, to turn said paper over, and to return said paper to said first paper path to imprint said paper on a second side, and an openable lid located adjacent said first and second paper paths, said lid providing access to said first and second paper paths, said duplexing unit being attahcable as a module to an electrographic printing apparatus.
Claim 20
Dependent Claim
153 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region, and an area of reversion, said first region forming a portion of a first paper path along which said sheet of paper is imprinted on a first side, said second region and area of reversion forming a portion of a second paper path, said second paper path being operative to receive said sheet of paper from said first paper path, to turn said paper over, and to return said paper to said first paper path to imprint said paper on a second side, and an openable lid located adjacent said first and second paper paths, said lid providing access to said first and second paper paths, said duplexing unit being attahcable as a module to an electrographic printing apparatus.
Claim 21
Dependent Claim
27 words
The duplexing unit of claim 15 wherein said lid is located above said second paper path, said lid providing access to said second paper path from above.
Claim 22
Dependent Claim
134 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper to the like, comprising a first region, a second region, and an area of reversion, said first region, second region and area of reversion comprising a paper path, said paper path comprising a loop and a branch stemming therefrom, paper transport means for passing said sheet along said loop wherein said sheet is imprinted on a first side, for turning said sheet over, for passing said sheet into said branch, and for returning said sheet to said loop a second time for imprinting a second side of said sheet, and alignment correction means along said paper path, said duplexing unit being attachable as a module to an electrographic printing apparatus.
Claim 23
Dependent Claim
134 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper to the like, comprising a first region, a second region, and an area of reversion, said first region, second region and area of reversion comprising a paper path, said paper path comprising a loop and a branch stemming therefrom, paper transport means for passing said sheet along said loop wherein said sheet is imprinted on a first side, for turning said sheet over, for passing said sheet into said branch, and for returning said sheet to said loop a second time for imprinting a second side of said sheet, and alignment correction means along said paper path, said duplexing unit being attachable as a module to an electrographic printing apparatus.
Claim 24
Dependent Claim
143 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region and an area of reversion, said first region, second region, and area of reversion comprising a paper path, said paper path comprising a loop and a branch stemming therefrom, paper transport means for passing said sheet along said loop wherein said sheet is imprinted on a first side, for turning said sheet over, for passing said sheet into said branch, and for returning said sheet to said loop a second time for imprinting a second side of said sheet, and an openable lid located adjacent said paper path, said lid providing access to said paper path, said duplexing unit being attachable as a module to an electrographic printing apparatus.
Claim 25
Dependent Claim
143 words
A duplexing unit for attachment to an electrographic printing apparatus which produces hard copies of information to be recorded on a sheet of paper or the like, comprising a first region, a second region and an area of reversion, said first region, second region, and area of reversion comprising a paper path, said paper path comprising a loop and a branch stemming therefrom, paper transport means for passing said sheet along said loop wherein said sheet is imprinted on a first side, for turning said sheet over, for passing said sheet into said branch, and for returning said sheet to said loop a second time for imprinting a second side of said sheet, and an openable lid located adjacent said paper path, said lid providing access to said paper path, said duplexing unit being attachable as a module to an electrographic printing apparatus.
Claim 26
Dependent Claim
25 words
The duplexing unit of claim 16 wherein said lid is located above said paper path, said lid providing access to said paper path from above.
Claim 27
Dependent Claim
169 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said photoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and alignment correction means located along said second paper path.
Claim 28
Dependent Claim
169 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said photoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and alignment correction means located along said second paper path.
Claim 29
Dependent Claim
176 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after it is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said photoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and controller means for formatting the information to be imprinted on both sides of said paper.
Claim 30
Dependent Claim
176 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after it is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said photoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and controller means for formatting the information to be imprinted on both sides of said paper.
Claim 31
Dependent Claim
176 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after it is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said photoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and vacuum transport means located above said first paper path for transporting said paper from above.
Claim 32
Dependent Claim
176 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after it is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said photoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and vacuum transport means located above said first paper path for transporting said paper from above.
Claim 33
Dependent Claim
183 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after it is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said protoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and an openable lid located adjacent said first and second paper paths, said openable lid providing access to said first and second paths.
Claim 34
Dependent Claim
183 words
An electrographic printing apparatus for producing hard copies of information to be recorded on two sides of a sheet of paper or the like, comprising a housing, a source of paper and an output receptacle for receiving said paper after it is imprinted, a first paper path along which said paper travels between said source and said output receptacle, a photoconductive member for storing a latent electrostatic image of the information to be imprinted, said protoconductive member being located adjacent said first paper path and coming into contact with a first side of said paper in a transfer zone located in said first paper path to imprint said first side of said paper, a second paper path operative to receive said paper from said first paper path, to turn said paper over, and to return said paper to said first paper path at a location prior to said transfer zone so that a second side of said paper is imprinted, and an openable lid located adjacent said first and second paper paths, said openable lid providing access to said first and second paths.
Claim 35
Dependent Claim
28 words
The electrographic printing apparatus of claim 24 wherein said lid is located above said second paper path, said lid providing access to said second paper path from above.
References Cited (Backward Citations)
US3672765A
Cited
US3697171A
Cited
US3960445A
Cited
US4214831A
Cited
US4264183A
Cited
US4365886A
Cited
US4362379A
Cited
US4333641A
Cited
US4674866A
Cited
US4708462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |