US3884182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidised bed apparatus
Assignee: Individual
•
Filing: 1974-06-07
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Granted: 1975-05-20
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Expires: 1994-06-07
Abstract
Abstract A fluidized bed forming apparatus is provided which includes a filter extending partly across a base to define a plenum chamber beneath the filter. At least two end base portions are not above the plenum chamber and no fluidization occurs above those portions. Means are provided for supplying powder on to the base to form a fluidized bed which is retained by the unfluidized powder over those end base portions and else where either by solid walls or further walls of unfluidized powder.
Inventors
- 👤 Peter Charles Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:16
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/18; B05D1/22; B05D1/24; B05C; B05C19/00; B05C19/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
An apparatus for forming a fluidised bed, which comprises a base arranged to receive powder; a filter extending across part of the base but not across at least two base portions at opposite ends of the base, thereby to define a plenum chamber; a gas inlet leading into the plenum chamber; and means for supplying powder on to the base whereby a fluidised bed is formed over the filter and unfluidised powder accumulates above the said at least two base portions thereby to retain the fluidised powder against movement out of the fluidised bed.
Claim 2
Independent Claim
94 words
An apparatus for forming a fluidised bed, which comprises a base arranged to receive powder; a filter extending across part of the base but not across at least two base portions at opposite ends of the base, thereby to define a plenum chamber; a gas inlet leading into the plenum chamber; and means for supplying powder on to the base whereby a fluidised bed is formed over the filter and unfluidised powder accumulates above the said at least two base portions thereby to retain the fluidised powder against movement out of the fluidised bed.
Claim 3
Dependent Claim
20 words
An apparatus as claimed in claim 1, wherein the fluidised bed is retained entirely by unfluidised powder surrounding the bed.
Claim 4
Dependent Claim
39 words
An apparatus as claimed in claim 1, wherein the sides of the bed are defined by a pair of walls one of which has a knife edge at the top thereof to determine the level of the fluidised bed.
Claim 5
Dependent Claim
53 words
An apparatus as claimed in claim 3, wherein means for forming a second fluidised bed are positioned to receive material overflowing the knife edge and material escaping from the regions of unfluidised powder, the second fluidised bed having an outlet through which material from the second bed can pass to a powder reservoir.
Claim 6
Dependent Claim
30 words
An apparatus as claimed in claim 1, wherein means are providEd for feeding articles to be coated by the powder in the bed longitudinally through the first mentioned fluidised bed.
Claim 7
Dependent Claim
25 words
An apparatus as claimed in claim 5, wherein the articles are passed first through a heating zone and then through the first mentioned fluidised bed.
Claim 8
Dependent Claim
24 words
An apparatus as claimed in claim 5, wherein the articles are passed successively through a plurality of alternately arranged heating zones and fluidised beds.
Claim 9
Dependent Claim
55 words
An apparatus as claimed in claim 5, wherein means are provided for reciprocating the base in a direction parallel to the direction of travel of the articles, a greater velocity being given to the base in the same direction as that in which the articles travel than is given to it in the reverse direction.
Claim 10
Dependent Claim
62 words
An apparatus as claimed in claim 5, wherein the means for feeding the articles comprises a pair of chains each of which carries resilent material thereon so disposed that the articles are clamped between the resilient material carried by the one chain, means being provided for urging the resilient material on the one chain against the resilient material on the other chain.
Claim 11
Dependent Claim
83 words
An apparatus as claimed in claim 1, wherein the articles to be coated are components each having a lead wire extending from opposite faces thereof, further comprising means for rotating the components about an axis defined by the leads at a level such that the leads are just above the level of the fluidised bed, and comprising means for feeding powder on to a radially inner region of each face of the component which is not coated by passage through the fluidised bed.
Claim 12
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein means are provided for vibrating the base transversely.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |