Patent US3722453A successfully refreshed from Google Patents.
US3722453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid toning apparatus
Assignee: Photophysics Inc
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Filing: 1971-04-05
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Granted: 1973-03-27
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Expires: 1991-04-05
Abstract
Abstract Liquid toning apparatus is disclosed for developing a latent electrostatic image on the surface of a dielectrically coated sheet of flexible paper. The apparatus comprises a reservoir adapted to contain liquid toner at a predetermined liquid toner surface level. A rotatable cylinder is mounted for rotation about a cylinder axis disposed above and substantially parallel the liquid toner surface level a distance less than the radius of the cylinder whereby a portion of the rotatable cylinder is positioned above the liquid toner surface level, and another portion of the rotatable cylinder is simultaneously positioned beneath the liquid toner surface level. A plurality of juxtapositioned rollers are mounted adjacent the rotatable cylinder for rotation about a plurality of roller axes disposed above and substantially parallel the cylinder axis with the rollers and the rotatable cylinder defining therebetween an arcuate toning station. Guide means are also provided for guiding sheets of flexible paper into the arcuate toning station.
Inventors
- 👤 J Dahlquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:32
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/101
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
280 words
Liquid toning apparatus for developing a latent electrostatic image on the surface of a dielectrically coated sheet of flexible paper comprising: a reservoir adapted to contain liquid toner at a predetermined liquid toner surface level; a rotatable cylinder having a central section and two end sections and mounted for rotation about a cylinder axis disposed above and substantially parallel to said liquid toner surface level, said cylinder axis being disposed above said liquid toner surface level a distance less than the cylinder radius of said central section whereby a portion of the central section of said rotatable cylinder is positioned above said liquid toner surface level and another portion of the central section of said rotatable cylinder is simultaneously positioned beneath said liquid toner surface level, said two end sections being removed from said liquid toner surface; means for rotating said rotatable cylinder whereby successive portions of said central section of said cylinder may be positioned beneath said liquid toner surface level; a plurality of juxtapositioned rollers mounted adjacent each of said end sections of said rotatable cylinder for respective rotation about a plurality of roller axes disposed above and substantially parallel said cylinder axis, said rollers engaging said end sections along an arc over the top of said end sections and serving to drivably engage the edges of the paper between the cylinder end sections and the associated plurality of rollers; means extending over the central section of said rotatable cylinder and spaced therefrom and defining therebetween an arcuate toning station; and guide means for guiding sheets of flexible paper into said arcuate toning station with the edges of the sheet between said rollers and said cylinder end sections.
Claim 2
Dependent Claim
280 words
Liquid toning apparatus for developing a latent electrostatic image on the surface of a dielectrically coated sheet of flexible paper comprising: a reservoir adapted to contain liquid toner at a predetermined liquid toner surface level; a rotatable cylinder having a central section and two end sections and mounted for rotation about a cylinder axis disposed above and substantially parallel to said liquid toner surface level, said cylinder axis being disposed above said liquid toner surface level a distance less than the cylinder radius of said central section whereby a portion of the central section of said rotatable cylinder is positioned above said liquid toner surface level and another portion of the central section of said rotatable cylinder is simultaneously positioned beneath said liquid toner surface level, said two end sections being removed from said liquid toner surface; means for rotating said rotatable cylinder whereby successive portions of said central section of said cylinder may be positioned beneath said liquid toner surface level; a plurality of juxtapositioned rollers mounted adjacent each of said end sections of said rotatable cylinder for respective rotation about a plurality of roller axes disposed above and substantially parallel said cylinder axis, said rollers engaging said end sections along an arc over the top of said end sections and serving to drivably engage the edges of the paper between the cylinder end sections and the associated plurality of rollers; means extending over the central section of said rotatable cylinder and spaced therefrom and defining therebetween an arcuate toning station; and guide means for guiding sheets of flexible paper into said arcuate toning station with the edges of the sheet between said rollers and said cylinder end sections.
Claim 3
Dependent Claim
22 words
Liquid toning apparatus in accordance with claim 1 wherein each of said roller axes is positioned substantially equidistantly from said cylinder axis.
Claim 4
Dependent Claim
54 words
Liquid toning apparatus in accordance with claim 1 wherein said means extending over the central section of said rotatable cylinder comprising a central section in each of the rollers engaging each of the end sections of said rotatable cylinder, each of said central sections of said rollers being spaced from said cylinder central section.
Claim 5
Dependent Claim
69 words
Liquid toning apparatus in accordance with claim 1 wherein one of said end sections of said cylinder comprises a first wheel coaxially mounted to said rotatable cylinder in spaced relation with one end of said rotatable cylinder, and wherein the other of said end sections of said cylinder comprises a second wheel coaxially mounted to said rotatable cylinder in spaced relation with the other end of said rotatable cylinder.
Claim 6
Dependent Claim
35 words
Liquid toning apparatus in accordance with claim 4 wherein said rollers are mounted in contact with said first and second wheels whereby rotation of said wheels by said rotating means imparts rotation to said rollers.
Claim 7
Dependent Claim
44 words
Liquid toning apparatus in accordance with claim 1 wherein said guide means comprises an arcuate scoop having a lip disposed adjacent said rotatable cylinder and said means extending over the central section of said rotatable cylinder at the entrance end of said toning station.
Claim 8
Dependent Claim
41 words
Liquid toning apparatus in accordance with claim 6 comprising a second arcuate scoop having a lip disposed adjacent said rotatable cylinder and said means extending over the central section of said rotatable cylinder at the exit end of said toning station.
Claim 9
Dependent Claim
26 words
Liquid toning apparatus in accordance with claim 1 having a vessel mounted within said reservoir in spaced relation with the central section of said rotatable cylinder.
Claim 10
Dependent Claim
21 words
Liquid toning apparatus in accordance with claim 8 wherein said vessel is cylindrical and is mOunted coaxially with said rotatable cylinder.
Claim 11
Dependent Claim
46 words
Liquid toning apparatus in accordance with claim 9 comprising pump means for pumping liquid toner disposed in said reservoir beneath said vessel up and into said vessel, and drain means for draining liquid toner from said vessel into portions of said reservoir disposed beneath said vessel.
Claim 12
Dependent Claim
27 words
Liquid toning apparatus in accordance with claim 8 comprising capillary means having a portion thereof disposed between the central section of said rotatable cylinder and said vessel.
Claim 13
Dependent Claim
42 words
Liquid toning apparatus in accordance with claim 11 wherein said portion of said capillary means is disposed beneath said predetermined liquid toner surface level and wherein said capillary means has a second portion thereof disposed above said predetermined liquid toner surface level.
Claim 14
Dependent Claim
57 words
Liquid toning apparatus in accordance with claim 12 wherein said second portion of said capillary means is disposed between the central section of said rotatable cylinder and said guide means whereby liquid toner in said vessel may be drawn upwardly into contact with said rotatable cylinder at a point adjacent said guide means and said toning station.
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |