US3561400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer apparatus
Assignee: ANACOMP Inc 11550 NORTH MERIDAN STREET CARMEL INDIANA 46032 A CORP OF INDIANA
•
Filing: 1968-07-23
•
Granted: 1971-02-09
•
Expires: 1988-07-23
Abstract
Abstract Apparatus is described for developing a latent image on a sheet. Toner is deposited on the sheet by passing the sheet over a projecting portion of a cylindrical roller in contact with a film of fluid established by rotating the roller. The fluid has toner entrained therein and is supplied to the roller by a pump via a space between the roller and a shroud, which surrounds the roller except for an opening through which the projecting portion of the roller extends. Wiper means both remove residual material from the roller and prevent the removed material from returning to said space.
Inventors
- 👤 Louis A Smitzer
- 👤 Byung Sik Hong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:03
CPC Classifications
G; G03; G03D; G03D5/00; G03D5/06; G03D5/067; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
161 words
Developer apparatus for developing a latent image on a sheet, comprising, a cylindrical roller, a shroud surrounding said roller and defining a space between said roller and said shroud, said shroud having an opening therein permitting a portion of said roller to project beyond said shroud, means for providing a continuous supply of developer liquid to said space, means for rotating said roller to carry a film of the liquid from one side of said space over the projecting portion of said roller, means for conveying the latent image bearing sheet past the projecting portion of said roller in contact with the film of liquid, a wiper adjacent said roller on one side of said opening in said shroud for preventing partially exhausted liquid from returning to said space after passing over the projecting portion of said roller, and means outside said shroud for collecting partially exhausted liquid after it passes over the projecting portion of said roller and said wiper.
Claim 2
Dependent Claim
161 words
Developer apparatus for developing a latent image on a sheet, comprising, a cylindrical roller, a shroud surrounding said roller and defining a space between said roller and said shroud, said shroud having an opening therein permitting a portion of said roller to project beyond said shroud, means for providing a continuous supply of developer liquid to said space, means for rotating said roller to carry a film of the liquid from one side of said space over the projecting portion of said roller, means for conveying the latent image bearing sheet past the projecting portion of said roller in contact with the film of liquid, a wiper adjacent said roller on one side of said opening in said shroud for preventing partially exhausted liquid from returning to said space after passing over the projecting portion of said roller, and means outside said shroud for collecting partially exhausted liquid after it passes over the projecting portion of said roller and said wiper.
Claim 3
Dependent Claim
44 words
Developer apparatus according to claim 1 including a reservoir for the liquid, said reservoir having a capacity substantially greater than the capacity of said space, and means for circulating liquid from said collecting means to said reservoir and from said reservoir to said space.
Claim 4
Dependent Claim
27 words
Developer apparatus according to claim 2 including agitator means in said reservoir for mixing the liquid entering from said collecting means with the liquid in said reservoir.
Claim 5
Dependent Claim
31 words
Developer apparatus according to claim 1 wherein said collecting means include a pair of squeeze rollers for engaging the top and bottom, respectively, of the sheet and removing excess liquid therefrom.
Claim 6
Dependent Claim
24 words
Developer apparatus according to claim 4 wherein said collecting means include means positioned below said squeeze rollers for collecting liquid removed from the sheet.
Claim 7
Dependent Claim
22 words
Developer apparatus according to claim 4 including means for removing deposits adhering to the lower one of said pari of squeeze rollers.
Claim 8
Dependent Claim
32 words
Developer apparatus according to claim 6 wherein said deposit removing means comprise a wiper blade positioned to contact said lower squeeze roller just after the region of contact thereof with the sheet.
Claim 9
Dependent Claim
19 words
Developer apparatus according to claim 1 for developing electrostatic images wherein said roller is comprised of electrically conductive material.
Claim 10
Dependent Claim
114 words
Developer apparatus for developing a latent electrostatic image on a sheet, comprising, a cylindrical roller of electrically conductive material, means for providing a continuous supply of liquid having entrained charged toner particles to a partially confined region adjacent said roller, means for rotating said roller to carry a film of thE liquid over the top of said rollers, a wiper for preventing liquid from returning to said partially confined region after passing over the top of said roller, and means for conveying the latent image bearing sheet over the top of said roller in contact with the film of liquid, said roller being at an electrical potential to constitute the only intensifier electrode utilized.
Claim 11
Dependent Claim
114 words
Developer apparatus for developing a latent electrostatic image on a sheet, comprising, a cylindrical roller of electrically conductive material, means for providing a continuous supply of liquid having entrained charged toner particles to a partially confined region adjacent said roller, means for rotating said roller to carry a film of thE liquid over the top of said rollers, a wiper for preventing liquid from returning to said partially confined region after passing over the top of said roller, and means for conveying the latent image bearing sheet over the top of said roller in contact with the film of liquid, said roller being at an electrical potential to constitute the only intensifier electrode utilized.
Claim 12
Dependent Claim
29 words
Developer apparatus according to claim 9 wherein said roller is rotated in a direction to cause the top portion to move in the direction of movement of the sheet.
References Cited (Backward Citations)
US2563544A
Cited
US1955414A
Cited
US2590538A
Cited
US2875094A
Cited
US2861541A
Cited
US2995469A
Cited
US3242902A
Cited
US3245341A
Cited
US3368526A
Cited
US3367791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |