US3854446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for wet treatment of sheet or strip material
Assignee: Agfa Gevaert AG
•
Filing: 1973-05-23
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Granted: 1974-12-17
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Expires: 1993-05-23
Abstract
Abstract Apparatus for wet treatment of sheet- or strip-shaped material which is provided at its underside with a photosensitive layer has a liquid-containing vessel with rolls which advance the material along a substantially horizontal path above one or more liquid applying devices whose hollow tubular housings rotate about horizontal axes and dip into the supply of liquid in the vessel to apply liquid to the underside of the material. Each housing contains a feed screw which rotates therewith and conveys a stream of liquid from openings at one end to openings at the other end of the respective housing. A pump draws liquid from the vessel and discharges the thus withdrawn liquid into the vessel at right angles to the direction of transport of material so that the chemical activity of liquid which is being fed by the pump decreases in a direction from one marginal portion toward the other marginal portion of the material. Each housing discharges liquid at the other marginal portion of the material whereby such liquid flows transversely of the path and its chemical activity decreases in a direction counter to that of the chemical activity of liquid which is being fed by the pump. This insures a more uniform treatment of each portion of the photosensitive layer.
Inventors
- 👤 E Stievenart
- 👤 H Deconinck
- 👤 J Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:32
CPC Classifications
G; G03; G03D; G03D5/00; G03D5/06; G03D5/067; G03D3/00; G03D3/02; G03D3/04; G03D3/06; G03D3/065
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
180 words
In an apparatus for wet treatment of running sheet or strip material, combination comprising a vessel for a supply of treating liquid, said vessel having an inlet for introduction and an outlet for evacuation of material whereby the material which travels lengthwise between said inlet and said outlet advances along a predetermined path; at least one elongated roll mounted in said vessel and including an elongated hollow cylindrical housing having a peripheral surface contacting the material in said path, an internal surface, at least one liquid-admitting first opening in the region of one end and at least one liquiddischarging second opening in the region of the other end thereof, said housing being rotatable about a substantially horizontal axis extending transversely of said path and at least a portion thereof dipping into said supply of liquid; and liquid conveying means including a feed screw provided in said housing and arranged to establish a flow of liquid from said first to said second opening, said feed screw having threads in at least partial sealing engagement with said internal surface of said housing.
Claim 2
Dependent Claim
180 words
In an apparatus for wet treatment of running sheet or strip material, combination comprising a vessel for a supply of treating liquid, said vessel having an inlet for introduction and an outlet for evacuation of material whereby the material which travels lengthwise between said inlet and said outlet advances along a predetermined path; at least one elongated roll mounted in said vessel and including an elongated hollow cylindrical housing having a peripheral surface contacting the material in said path, an internal surface, at least one liquid-admitting first opening in the region of one end and at least one liquiddischarging second opening in the region of the other end thereof, said housing being rotatable about a substantially horizontal axis extending transversely of said path and at least a portion thereof dipping into said supply of liquid; and liquid conveying means including a feed screw provided in said housing and arranged to establish a flow of liquid from said first to said second opening, said feed screw having threads in at least partial sealing engagement with said internal surface of said housing.
Claim 3
Dependent Claim
37 words
A combination as defined in claim 1, wherein said peripheral surface transfers liquid from said supply to the underside of material in said and the underside of material in said path is provided with a photosensitive layer.
Claim 4
Dependent Claim
19 words
A combination as defined in claim 1, further comprising means for rotating said feed screw relative to said vessel.
Claim 5
Dependent Claim
73 words
A combination as defined in claim 1, further comprising at least one liquid applying device mounted in said vessel at level below said path, said device being rotatable in said vessel about a second axis extending transversely of said path and having a peripheral surface dipping into said supply of liquid and contacting the material in said path, and drive means for rotating said housing and said additional device about the respective axes.
Claim 6
Dependent Claim
32 words
A combination as defined in claim 4, wherein said drive means includes means for rotating said housing at a first RPM and means for rotating said device at a lower second RPM.
Claim 7
Dependent Claim
20 words
A combination as defined in claim 5, wherein said feed screw which rotates with said housing at said first RPM.
Claim 8
Dependent Claim
32 words
A combination as defined in claim 1, further comprising drive means for rotating said housing so that said peripheral surface rotates counter to the direction of transport of material along said path.
Claim 9
Dependent Claim
19 words
A combination as defined in claim 7, wherein approximately one-third of said housing dips into said supply of liquid.
Claim 10
Dependent Claim
50 words
A combination as defined in claim 1, wherein said first and second openings are respectively located at a first and a second side of said path, and further comprising means for circulating the liquid of said supply in a direction from said first toward said second side of said path.
Claim 11
Dependent Claim
20 words
A combination as defined in claim 1, wherein said second opening is provided in said peripheral surface of said housing.
Claim 12
Dependent Claim
21 words
A combination as defined in claim 10, wherein said second opening is arranged to discharge liquid substantially tangentially of said housing.
Claim 13
Dependent Claim
29 words
A combination as defined in claim 1, wherein said housing has a cylindrical shell and two end walls, said first opening being provided in one of said end walls.
Claim 14
Dependent Claim
59 words
A combination as defined in claim 1, further comprising means for advancing sheet or strip material along said path, said means for advancing comprising a first pair of rolls in the region of said inlet and a second pair of rolls in the region of said outlet, said housing being located between said first and second pairs of rolls.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |