Patent US3719030A successfully refreshed from Google Patents.
US3719030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic powder spraying recovery method and apparatus
Assignee: Metokote Precision Inc
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Filing: 1971-03-12
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Granted: 1973-03-06
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Expires: 1991-03-12
Abstract
Abstract A method and apparatus for reclaiming excess powder spray in a coating process utilizes portable filtering units connected between a spray booth and an exhausting hood. Flexible bellows and a camming lock permit a rapid connection of a different filtering unit for each color plastic or type of plastic to prevent contamination.
Inventors
- 👤 J Blankemeyer
- 👤 D Blankemeyer
- 👤 R Blankemeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:30
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/66; B01D46/74; B01D46/76; B01D46/0002; B01D46/0013; B01D46/02; B01D46/04; B05; B05B; B05B14/00; B05B14/40; B05B14/43; B05B16/00; B05B16/40; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A method of reclaiming excess powder spray during a coating process of articles using separate plastic powder materials having different properties without contamination comprising the steps of: spraying in successive steps a separate plastic powder for coating an article in accordance with a predetermined coating process; collecting the excess plastic powder from the spraying step with an exhausting gas flow; filtering the excess plastic powder from the gas flow with a portable filtering unit; removing the portable filtering unit and replacing it with another each time a separate plastic powder material is used in accordance with the predetermined coating process; reusing the reclaimed plastic powder in the spraying step whereby the separate plastic powder materials are not contaminated.
Claim 2
Dependent Claim
22 words
The method of claim 1 where the plastic powder materials sprayed for coating an article differ only in the property of color.
Claim 3
Dependent Claim
154 words
A filtering and Collecting apparatus for reclaiming excess plastic powder spray during a coating process of articles using separate plastic powder materials having different properties without intermixing, comprising: means for spraying in successive steps different plastic powders on the articles to be coated; means for collecting the overspray material including a source of gas flow to transport the overspray material; means for filtering the overspray plastic powder material from the gas flow including a plurality of portable filtering units used one at a time and a stationary hood connected to the gas flow; means for removably connecting the portable filtering units to the stationary hood so that each individual filtering unit is capable of being quickly fastened and released from the stationary hood, and means for collecting the overspray plastic powder material so that the plastic powder can be resprayed and one portable filtering unit can be used with each separate plastic powder material.
Claim 4
Dependent Claim
52 words
The filtering and collecting apparatus of claim 3 where the means for collecting the overspray material includes a pipe for carrying the overspray material, and the portable filtering unit having an entrance port with a resilient gasket for permitting the pipe to be rapidly connected to the portable filtering unit without leakage.
Claim 5
Dependent Claim
26 words
The filtering and collecting apparatus of claim 3 where the means for removably connecting the portable filtering units and the stationary hood includes a flexible bellows.
Claim 6
Dependent Claim
38 words
The filtering and collecting apparatus of claim 5 where the means for removably connecting the portable filtering units and the stationary hood further includes a camming lock to securely fasten a portable filtering unit and the stationary hood.
Claim 7
Dependent Claim
29 words
The filtering and collecting apparatus of claim 5 where the portable filtering units include filtering bags and means for shaking the filtering bags to remove accumulated excess plastic powder.
Claim 8
Dependent Claim
16 words
The filtering and collecting apparatus of claim 7 where the portable filtering unit includes swivel wheels.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |