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Patent US3893410A successfully refreshed from Google Patents.
US3893410A
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US
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Cascade coater
Assignee: Agfa Gevaert AG
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Filing: 1973-07-30
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Granted: 1975-07-08
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Expires: 1993-07-30
Abstract
Abstract In a cascade coater for the multiple coating of material in sheet form, the delivery gaps for the coating liquid which open onto the flow plane are each connected with a pressuredistributing chamber. This pressure-distributing chamber in turn communicates with another pressure-distributing chamber either through a narrow connecting gap or through a number of openings. The arrangement of pressure-distributing chambers one behind the other provides for an extremely uniform coating over the entire sheet width.
Inventors
- 👤 Peter Herzhoff
- 👤 Hans Gref
- 👤 Fritz Maus
- 👤 Wolfgang Schweicher
- 👤 Hans Frenken
- 👤 Kurt Browatzki
- 👤 Karl Voss
- 👤 Willi Wasser
- 👤 Heinrich Bubmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:10
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; B; B05; B05C; B05C5/00; B05C5/007; B05C9/00; B05C9/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
A cascade coater for coating sheet material, comprising a coating block extending over the entire sheet width with an inclined flow plane interrupted by a delivery gap for the delivery or each coating liquid, and a coating roller arranged at a short distance from the coating block over which the sheet to be coated is guided, wherein the delivery gaps open into a second pressure-distributing chamber which is connected to a first pressure-distributing chamber through a narrow connecting gap means, the cross section of the connecting gap means being small in relation to the cross section of the delivery gap.
Claim 2
Dependent Claim
100 words
A cascade coater for coating sheet material, comprising a coating block extending over the entire sheet width with an inclined flow plane interrupted by a delivery gap for the delivery or each coating liquid, and a coating roller arranged at a short distance from the coating block over which the sheet to be coated is guided, wherein the delivery gaps open into a second pressure-distributing chamber which is connected to a first pressure-distributing chamber through a narrow connecting gap means, the cross section of the connecting gap means being small in relation to the cross section of the delivery gap.
Claim 3
Dependent Claim
32 words
A coater as claimed in claim 1, wherein the cross section of the connecting gap means is at least 5 to 10 times smaller than the cross section of the delivery gap.
Claim 4
Dependent Claim
60 words
A coater as claimed in claim 1, wherein the connecting gap means is a single connecting gap, the width of the connecting gap is between 0.3 and 0.5 mm and its length is between 10 and 20 mm, while the width of the delivery gap is between 1.5 and 5 mm and its length is between 10 and 20 mm.
Claim 5
Dependent Claim
53 words
A coater as claimed in claim 1, wherein the first pressure-distributing chamber consists of a pipe running parallel to the coating roller which, at one end, is provided with an inlet for the coating liquid and is connected to the second pressure-distributing chamber through a connecting gap means comprising a number of bores.
Claim 6
Dependent Claim
31 words
A coater as claimed in claim 4, wherein the bores are arranged at intervals of 1 to 8 mm from one another and have a diameter of 0.3 to 1 mm.
Claim 7
Dependent Claim
30 words
A coater as claimed in claim 4, wherein the pipe is arranged within the second pressure-distributing chamber and is provided along the lowest generatrix with the bores directed vertically downwards.
Claim 8
Dependent Claim
51 words
A coater as claimed in claim 4, wherein the bores are arranged at equal intervals apart, but increase in diameter from the inlet for the coating liquid to the end of the pipe in such a way that the same quantity of coating liquid flows through each bore per unit time.
Claim 9
Dependent Claim
47 words
A coater as claimed in claim 4, wherein all the bores have the same diameter, but the intervals separating them decrease towards the end of the pipe in such a way that the same quantity of coating liquid flows into the second pressure chamber per unit width.
Claim 10
Dependent Claim
58 words
A coater as claimed in claim 4, wherein the intervaLs between and the diameters of the bores are constant and their diameters are sufficiently small that the flow-induced drop in pressure between the inlet for the coating liquid and the end of the pipe amounts to at most 5 percent of the overall pressure prevailing in the pipe.
Claim 11
Dependent Claim
17 words
A coater as claimed in claim 1, wherein the second pressure-distributing chamber has a funnel-shaped cross section.
References Cited (Backward Citations)
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US3442304A
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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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |