US4739591A
Expired / Lapsed
US
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Method for producing a screened layer for an electrophotographic element
Assignee: Canon Production Printing Netherlands BV
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Filing: 1986-07-14
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Granted: 1988-04-26
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Expires: 2006-07-14
Abstract
Abstract A method of producing a screened layer on an electrophotographic element by applying a homogeneous layer to a support and removing small areas from the layer by blasting it with particles having a diameter of between 5 and 1000 μm.
Inventors
- 👤 Roelof H. Everhardus
- 👤 Hubertus G. Eggels
- 👤 Ronald Berkhout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:38
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A method of producing a screened layer for an electrophotographic element by applying a homogeneous layer to a support and completely removing small areas having a diameter of between about 1 and 200 μm from the homogeneous layer by blasting the layer in the absence of a screen with particles having a diameter of between 5 and 1000 μm.
Claim 2
Independent Claim
59 words
A method of producing a screened layer for an electrophotographic element by applying a homogeneous layer to a support and completely removing small areas having a diameter of between about 1 and 200 μm from the homogeneous layer by blasting the layer in the absence of a screen with particles having a diameter of between 5 and 1000 μm.
Claim 3
Independent Claim
60 words
A method of producing a screened layer for an electrophotographic element by applying a homogeneous charge-generating layer to a support and completely removing small areas having a diameter of between 1 and 200 μm from the homogeneous charge-generating layer by blasting the layer in the absence of a screen with particles having a diameter of between 5 and 1000 μm.
Claim 4
Independent Claim
60 words
A method of producing a screened layer for an electrophotographic element by applying a homogeneous charge-generating layer to a support and completely removing small areas having a diameter of between 1 and 200 μm from the homogeneous charge-generating layer by blasting the layer in the absence of a screen with particles having a diameter of between 5 and 1000 μm.
Claim 5
Dependent Claim
17 words
The method of claim 2 wherein a charge-transporting layer is applied to the charge-generating layer after blasting.
Claim 6
Independent Claim
59 words
A method of producing a screened layer for an electrophotographic element by applying a homogeneous layer to a support and completely removing small areas having a diameter of between 1 and 200 μm from the homogeneous layer by blasting the layer in the absence of a screen with glass pearls having a diameter of between 5 and 1000 μm.
Claim 7
Independent Claim
59 words
A method of producing a screened layer for an electrophotographic element by applying a homogeneous layer to a support and completely removing small areas having a diameter of between 1 and 200 μm from the homogeneous layer by blasting the layer in the absence of a screen with glass pearls having a diameter of between 5 and 1000 μm.
References Cited (Backward Citations)
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US3702042A
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |