US4058306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detack and stripping system
Assignee: Xerox Corp
•
Filing: 1976-05-24
•
Granted: 1977-11-15
•
Expires: 1996-05-24
Abstract
Abstract In an electrostatographic copying system where a toner image on a photoreceptor is transferred to a copy sheet with transfer charges, which charges are removed from the copy sheet by passing the copy sheet under a detacking corona generator, the body of the copy sheet is supported to insure its stripping from the photoreceptor at a point under the detack corona generating electrode where the transfer charge thereon is only partially neutralized, while a restricted minor area of the lead edge of the copy sheet is stripped further downstream, where it has been substantially fully neutralized, at a fixed position controlled by a mechanical stripper finger.
Inventors
- 👤 Gerald M. Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:21
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6532; Y; Y10; Y10S; Y10S271/00; Y10S271/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
301 words
In an electrostatic image reproduction system wherein an image on a first image support surface member is transferred to a second image support surface member at a transfer station by means of electrostatic transfer means leaving an electrostatic transfer charge on the second image support member, and wherein the second image support member is then subjected to transfer charge neutralizing corona emissions by movement through a defined corona emission area from neutralizing corona emission means having a corona emitting element therein to neutralize the transfer charge on the second image support member, and wherein the second image support member is stripped from the first image support member by stripping means and transported away from said first image support member with transport means, and wherein said second image support member moves through the transfer station with a lead edge first, the improvement comprising the steps of: stripping the lead edge of the second image support member away from the first image support member at a first fixed stripping position which is after the lead edge has moved through substantially the entire defined area of said neutralizing corona emissions from said neutralizing corona emission means by mechanically preventing the movement of the lead edge on said first image support member beyond said first fixed stripping position by the stripping means, and then, after the lead edge of the second image support member has been stripped away from the first image support member, shifting the stripping position of the remainder of the second image support member to a second fixed stripping position intermediately of said defined area of corona emissions by holding a portion of the second image support member on the transport means at a fixed position spaced relative to the first image support surface and the transfer charge neutralizing corona emitting element.
Claim 2
Dependent Claim
301 words
In an electrostatic image reproduction system wherein an image on a first image support surface member is transferred to a second image support surface member at a transfer station by means of electrostatic transfer means leaving an electrostatic transfer charge on the second image support member, and wherein the second image support member is then subjected to transfer charge neutralizing corona emissions by movement through a defined corona emission area from neutralizing corona emission means having a corona emitting element therein to neutralize the transfer charge on the second image support member, and wherein the second image support member is stripped from the first image support member by stripping means and transported away from said first image support member with transport means, and wherein said second image support member moves through the transfer station with a lead edge first, the improvement comprising the steps of: stripping the lead edge of the second image support member away from the first image support member at a first fixed stripping position which is after the lead edge has moved through substantially the entire defined area of said neutralizing corona emissions from said neutralizing corona emission means by mechanically preventing the movement of the lead edge on said first image support member beyond said first fixed stripping position by the stripping means, and then, after the lead edge of the second image support member has been stripped away from the first image support member, shifting the stripping position of the remainder of the second image support member to a second fixed stripping position intermediately of said defined area of corona emissions by holding a portion of the second image support member on the transport means at a fixed position spaced relative to the first image support surface and the transfer charge neutralizing corona emitting element.
Claim 3
Dependent Claim
22 words
The electrostatic image reproduction system of claim 1, wherein said second fixed stripping position is centrally of said defined corona emission area.
Claim 4
Dependent Claim
46 words
The electrostatic image reproduction system of claim 1, wherein said second fixed stripping portion is centrally of said defined corona emission area and closely adjacent said corona emitting element and said first fixed stripping position is closely adjacent the edge of said defined corona emission area.
Claim 5
Dependent Claim
43 words
The electrostatic image reproduction system of claim 1, wherein the distance by which said stripping position of the second image support member is shifted from said first fixed stripping position to said second fixed stripping position is not more than approximately 1 centimeter.
Claim 6
Dependent Claim
298 words
In an electrostatic image reproduction system wherein an image on a first image support surface member is transferred to a second image support surface member at a transfer station by electrostatic transfer means leaving an electrostatic transfer charge on the second image support member, and wherein the second image support member is then subjected to transfer charge neutralizing corona emissions by movement, with a lead edge first, through a defined corona emission area from neutralizing corona emission means having a corona emitting element therein to neutralize the transfer charge on the second image support member, and wherein the second image support member is stripped from the first image support member by stripping means and transported away from said first image support member by transport means, the improvement wherein: said stripping means strips the lead edge of the second image support member away from the first image support member at a first fixed stripping position located after the lead edge has moved through substantially the entire defined area of said neutralizing corona emissions from said neutralizing corona emission means by said stripping means positively mechanically preventing the movement of the lead edge on said first image support member beyond said first fixed stripping position, and said transport means shifting the stripping position of the remainder of the second image support member to a second fixed stripping position which is intermediate said defined area of corona emissions, and substantially spaced from said first fixed stripping point, by holding a portion of the second image support member on said transport means at a fixed position spaced relative to the first image support surface and the transfer charge neutralizing corona emitting element after the lead edge of the second image support member has been stripped away from the first image support member.
Claim 7
Dependent Claim
298 words
In an electrostatic image reproduction system wherein an image on a first image support surface member is transferred to a second image support surface member at a transfer station by electrostatic transfer means leaving an electrostatic transfer charge on the second image support member, and wherein the second image support member is then subjected to transfer charge neutralizing corona emissions by movement, with a lead edge first, through a defined corona emission area from neutralizing corona emission means having a corona emitting element therein to neutralize the transfer charge on the second image support member, and wherein the second image support member is stripped from the first image support member by stripping means and transported away from said first image support member by transport means, the improvement wherein: said stripping means strips the lead edge of the second image support member away from the first image support member at a first fixed stripping position located after the lead edge has moved through substantially the entire defined area of said neutralizing corona emissions from said neutralizing corona emission means by said stripping means positively mechanically preventing the movement of the lead edge on said first image support member beyond said first fixed stripping position, and said transport means shifting the stripping position of the remainder of the second image support member to a second fixed stripping position which is intermediate said defined area of corona emissions, and substantially spaced from said first fixed stripping point, by holding a portion of the second image support member on said transport means at a fixed position spaced relative to the first image support surface and the transfer charge neutralizing corona emitting element after the lead edge of the second image support member has been stripped away from the first image support member.
Claim 8
Dependent Claim
53 words
The electrostatic image reproduction system of claim 5, wherein said second fixed stripping position is centrally of said defined corona emission area and closely adjacent the peak corona emission area of said corona emission means for stripping said second image support member at a position where said transfer charge thereon is partially neutralized.
Claim 9
Dependent Claim
46 words
The electrostatic image reproduction system of claim 5, wherein said second fixed stripping portion is centrally of said defined corona emission area and closely adjacent said corona emitting element, and said first fixed stripping position is closely adjacent and edge of said defined corona emission area.
Claim 10
Dependent Claim
30 words
The electrostatic image reproduction system of claim 5, wherein the distance between said first fixed stripping position and said second fixed stripping position is not more than approximately 1 centimeter.
Claim 11
Dependent Claim
32 words
The electrostatic image reproduction system of claim 5, wherein said neutralizing corona emission means includes shield means spaced on opposite sides of said corona emitting element defining said defined corona emission area.
Claim 12
Dependent Claim
37 words
The electrostatic image reproduction system of claim 5, wherein said transport means comprises a fixed vacuum manifold guide surface spaced above said first image support member and closely adjacent an edge of said defined corona emission area.
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) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |