US4924273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller transfer apparatus
Assignee: Eastman Kodak Co
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Filing: 1989-04-18
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Granted: 1990-05-08
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Expires: 2009-04-18
Abstract
Abstract An improved transfer apparatus for use in an electrostatographic copier including a dielectric member adapted to carry electrostatically developed marking particle images. The transfer apparatus comprises a cylindrical roller mounted for rotation about its longitudinal axis and located such that its peripheral surface is in operative relation with the dielectric member of the copier. A receiver member is selectively tacked, at least at its lead marginal edge, on the peripheral surface of the roller by vacuum attraction, such vacuum being effective through ports in the roller. At least one trough is formed in the roller substantially aligned with the vacuum ports. Such trough minimizes contact of the tacked lead edge of the receiver sheet to the peripheral surface of the roller, thereby facilitating release of the sheet from the roller at a desired time.
Inventors
- 👤 Brian J. Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:17
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A transfer apparatus located such that its peripheral surface is in operative relation with the dielectric member of an electrostatographic copier, said transfer apparatus comprising: means for selectively tacking at least the lead marginal edge of a receiver member on the peripheral surface of said apparatus along an element thereof; and means defined in the peripheral surface of said apparatus substantially aligned with said tacking means for minimizing contact of the tacked lead edge of the receiver sheet to the peripheral surface of said apparatus, thereby facilitating release of the sheet from said apparatus at a desired time.
Claim 2
Dependent Claim
98 words
A transfer apparatus located such that its peripheral surface is in operative relation with the dielectric member of an electrostatographic copier, said transfer apparatus comprising: means for selectively tacking at least the lead marginal edge of a receiver member on the peripheral surface of said apparatus along an element thereof; and means defined in the peripheral surface of said apparatus substantially aligned with said tacking means for minimizing contact of the tacked lead edge of the receiver sheet to the peripheral surface of said apparatus, thereby facilitating release of the sheet from said apparatus at a desired time.
Claim 3
Dependent Claim
40 words
The invention of claim 1 wherein said tacking means includes a plurality of ports defined in the peripheral surface of said transfer apparatus and aligned along an element of said surface, and a vacuum source selectively coupled to said ports.
Claim 4
Dependent Claim
27 words
The invention of claim 2 wherein said minimizing means includes at least one trough defined in the peripheral surface of said transfer apparatus adjacent to said ports.
Claim 5
Dependent Claim
46 words
The invention of claim 2 wherein said minimizing means includes a pair of troughs defined in the peripheral surface of said transfer apparatus, said troughs being substantially aligned with said ports and extending away from said ports adjacent to the outboard ends of said apparatus respectively.
Claim 6
Dependent Claim
28 words
The invention of claim 4 wherein said minimizing means further includes an additional trough located immediately upstream of said ports and axially spaced between said pair of troughs.
Claim 7
Dependent Claim
134 words
An improved transfer apparatus including a substantially cylindrical roller mounted for rotation about its longitudinal axis and located such that its peripheral surface is in operative relation with the dielectric member of an electrostatographic copier, a plurality of ports defined in the peripheral surface of said transfer roller and aligned along an element of said surface, and a vacuum source selectively coupled to said ports for selectively tacking at least the lead marginal edge a receiver member on the peripheral surface of said roller along an element of said roller, the improvement comprising: means defined in the peripheral surface of said roller for minimizing contact of the tacked lead edge of the receiver sheet to the peripheral surface of said roller, thereby facilitating release of the sheet from said roller at a desired time.
Claim 8
Dependent Claim
134 words
An improved transfer apparatus including a substantially cylindrical roller mounted for rotation about its longitudinal axis and located such that its peripheral surface is in operative relation with the dielectric member of an electrostatographic copier, a plurality of ports defined in the peripheral surface of said transfer roller and aligned along an element of said surface, and a vacuum source selectively coupled to said ports for selectively tacking at least the lead marginal edge a receiver member on the peripheral surface of said roller along an element of said roller, the improvement comprising: means defined in the peripheral surface of said roller for minimizing contact of the tacked lead edge of the receiver sheet to the peripheral surface of said roller, thereby facilitating release of the sheet from said roller at a desired time.
Claim 9
Dependent Claim
30 words
The invention of claim 6 wherein said minimizing means includes at least one trough defined in the peripheral surface of said roller, said trough being located adjacent to said ports.
Claim 10
Dependent Claim
45 words
The invention of claim 6 wherein said minimizing means includes a pair of troughs defined in the peripheral surface of said roller, said troughs being substantially aligned with said ports and extending away from said ports adjacent to the outboard ends of said roller respectively.
Claim 11
Dependent Claim
28 words
The invention of claim 8 wherein said minimizing means further includes an additional trough located immediately upstream of said ports and axially spaced between said pair of troughs.
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |