US3828725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curtain coater with restricted flow
Assignee: Armstrong World Industries Inc
•
Filing: 1970-09-29
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Granted: 1974-08-13
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Expires: 1990-09-29
Abstract
Abstract Curtain coaters are utilized to provide a curtain of coating material through which an object to be coated passes. The coater head cavity herein is provided with means to restrict the flow of material from the curtain coater and thereby prevent the flooding of a slow moving article which is meant to be coated with a controlled, relatively thin layer of material. The means restricting the flow may be an open-celled material or a group of nested spheres.
Inventors
- 👤 W Lewicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:31
CPC Classifications
B; B05; B05C; B05C5/00; B05C5/005; Y; Y10; Y10S; Y10S118/00; Y10S118/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
Apparatus for creating a uniformly thin, continuous curtain of liquid comprising a substantially elongated coating head structure having a cavity in which liquid is contained, at the bottom of the head structure there is provided an elongated slot which communicates with the cavity within the head structure, the improvement comprising reticulated open-celled foam material completely within the cavity of the coating head to occupy a portion of the cavity and to reduce the amount of fluid within the cavity and to restrict the downward flow of liquid through the cavity towards the slot.
Claim 2
Dependent Claim
93 words
Apparatus for creating a uniformly thin, continuous curtain of liquid comprising a substantially elongated coating head structure having a cavity in which liquid is contained, at the bottom of the head structure there is provided an elongated slot which communicates with the cavity within the head structure, the improvement comprising reticulated open-celled foam material completely within the cavity of the coating head to occupy a portion of the cavity and to reduce the amount of fluid within the cavity and to restrict the downward flow of liquid through the cavity towards the slot.
Claim 3
Dependent Claim
93 words
Apparatus for creating a uniformly thin, continuous curtain of liquid comprising a substantially elongated coating head structure having a cavity in which liquid is contained, at the bottom of the head structure there is provided an elongated slot which communicates with the cavity within the head structure, the improvement comprising a plurality of spheres completely within the cavity of the coating head to occupy a portion of the cavity and to reduce the amount of fluid within the cavity and to restrict the downward flow of liquid through the cavity towards the slot.
Claim 4
Dependent Claim
93 words
Apparatus for creating a uniformly thin, continuous curtain of liquid comprising a substantially elongated coating head structure having a cavity in which liquid is contained, at the bottom of the head structure there is provided an elongated slot which communicates with the cavity within the head structure, the improvement comprising a plurality of spheres completely within the cavity of the coating head to occupy a portion of the cavity and to reduce the amount of fluid within the cavity and to restrict the downward flow of liquid through the cavity towards the slot.
Claim 5
Dependent Claim
23 words
The apparatus of claim 2 wherein the spheres are combined with a layer of open-celled foam positioned beneath a nested arrangement of spheres.
References Cited (Backward Citations)
CA601546A
Cited
US3365325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |