US3958758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spraying apparatus
Assignee: OI Glass Inc
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Filing: 1975-05-27
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Granted: 1976-05-25
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Expires: 1995-05-27
Abstract
Abstract Apparatus for spraying powdered materials. A spray gun for applying hot powdered thermoplastic materials to a substrate to be coated may be constructed in such a fashion as to have no moving parts. A first fluid amplifier section inspirates the powdered material and cool air from the outside atmosphere. A second fluid amplifier section also inspirates outside air. This air is heated as it is inspirated. A transition section connects the two fluid amplifier sections. The powdered material inspirated by the first fluid amplifier section mixes with the heated air inspirated by the second fluid amplifier section. This causes partial melting of the powdered material so that as it exits from the second fluid amplifier toward the substrate to be coated, the material is in a condition to allow more uniform coating of the substrate.
Inventors
- 👤 Joseph Piorkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:20
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/02; B05B7/04; B05B7/0416; B05B7/0425; B05B7/0491; B05B7/16; B05B7/1606; B05B7/1613; B05B7/162; B05B7/1626; B05B7/168
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
An apparatus for spraying heated, powdered material onto a substrate to be coated with said powdered material which comprises, in combination: a first fluid amplifier section; a cool air inlet section connected to said first fluid amplifier section for furnishing an amplified flow of air; a source of said powdered material connected to said first fluid amplifier section; a second fluid amplifier section; a transition section connecting said first and said second fluid amplifier sections; at least one heated air inlet section in communication with said transition section adjacent to said second fluid amplifier section; means, positioned in said heated air inlet section, for heating air which passes therethrough; and a source of air under pressure connected to both said first and said second fluid amplifier sections.
Claim 2
Independent Claim
127 words
An apparatus for spraying heated, powdered material onto a substrate to be coated with said powdered material which comprises, in combination: a first fluid amplifier section; a cool air inlet section connected to said first fluid amplifier section for furnishing an amplified flow of air; a source of said powdered material connected to said first fluid amplifier section; a second fluid amplifier section; a transition section connecting said first and said second fluid amplifier sections; at least one heated air inlet section in communication with said transition section adjacent to said second fluid amplifier section; means, positioned in said heated air inlet section, for heating air which passes therethrough; and a source of air under pressure connected to both said first and said second fluid amplifier sections.
Claim 3
Dependent Claim
92 words
The apparatus of claim 1 wherein said first fluid amplifier section comprises: a main body member; a first diverging nozzle section formed substantially longitudinally in said main body member; an annular chamber formed in said main body member and having a circumferential slot in communication within the smaller end of said first diverging nozzle section, said source of air under pressure being connected to said annular chamber; and a back plate, positioned to seal said annular chamber and define a gap of no more than one-thousandths of an inch for said slot.
Claim 4
Dependent Claim
58 words
The apparatus of claim 2 wherein said cool air inlet section is defined by an enclosed chamber with one wall thereof being said back plate and having said smaller end of said first diverging nozzle section opening into said enclosed chamber, said enclosed chamber also including an opening in one wall thereof in communication with the outside atmosphere.
Claim 5
Dependent Claim
34 words
The apparatus of claim 3 which further includes a tube, connected to said source of powdered material, extending through said enclosed chamber and terminating adjacent said smaller end of said first diverging nozzle section.
Claim 6
Dependent Claim
108 words
The apparatus of claim 2 wherein said transition section smoothly merges with the larger end of said first diverging nozzle section and wherein said second fluid amplifier section comprises: a second diverging nozzle section, formed substantially longitudinally in said main body member, having its smaller end smoothly merging with said transition section and its larger end opening to the outside atmosphere; and a second annular chamber, formed in said main body member, having a circumferential slot formed therein to bring said annular chamber into communication with the smaller end of said second diverging nozzle section, said source of air under pressure being connected to said second annular chamber.
Claim 7
Dependent Claim
23 words
The apparatus of claim 5 wherein said slot in said second annular chamber is no greater than twentyfive-ten-thousandths of an inch in width.
Claim 8
Dependent Claim
46 words
The apparatus of claim 5 wherein a portion of the air exiting from said slot in said second annular chamber flows along the surface of said second diverging nozzle section thereby preventing contact of heated air and said powdered material with said second diverging nozzle section.
References Cited (Backward Citations)
US2929436A
Cited
US3715076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |