US3814002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder spray booth
Assignee: Nordson Corp
•
Filing: 1973-04-26
•
Granted: 1974-06-04
•
Expires: 1993-04-26
Abstract
Abstract An electrostatic powder spray booth for facilitating the cleaning of the booth and the recovery of powder spray material. The booth has a bottom divided into troughs, each one of which is individually connected to a powder recovery system through a suction hose and manifold connection. Within each trough there is a baffle plate configurated so as to create a high velocity air stream along the side walls of the trough and an air turbulence chamber beneath the plate so that powder is swept from the side and bottom walls of the trough and out of the turbulence chamber into the powder recovery system. The baffle plates are adjustably mounted within the bottom troughs so that the velocity of the air stream over the side walls of the trough may be controlled and varied and the ports which connect the trough to the recovery system are adjustable in size so that the system may be balanced to maximize the cleansing effect of the suction air streams.
Inventors
- 👤 F Rombach
- 👤 C Venlet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:40
CPC Classifications
B; B05; B05B; B05B14/00; B05B14/40; B05B14/48; Y; Y10; Y10S; Y10S55/00; Y10S55/46
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
192 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having at least one opening, said bottom wall opening being adapted to establish communication between the interior of said booth and a pulverant material recovery system, said bottom wall defining at least one generally open top trough having downwardly and inwardly sloping side walls, and means for generating a high velocity air stream directed downwardly along the side walls of said trough to sweep pulverant material from said side walls, said high velocity air stream generating means including a baffle located within said trough, said baffle having generally upwardly and inwardly sloping side walls and having bottom edges spaced from but located closely adjacent the inside surface of said trough side walls so as to define a high velocity air flow passage between each of said baffle bottom edges and said trough side walls.
Claim 2
Dependent Claim
192 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having at least one opening, said bottom wall opening being adapted to establish communication between the interior of said booth and a pulverant material recovery system, said bottom wall defining at least one generally open top trough having downwardly and inwardly sloping side walls, and means for generating a high velocity air stream directed downwardly along the side walls of said trough to sweep pulverant material from said side walls, said high velocity air stream generating means including a baffle located within said trough, said baffle having generally upwardly and inwardly sloping side walls and having bottom edges spaced from but located closely adjacent the inside surface of said trough side walls so as to define a high velocity air flow passage between each of said baffle bottom edges and said trough side walls.
Claim 3
Dependent Claim
22 words
The spray booth of claim 1 in which said baffle is generally shaped as an inverted V when viewed in cross section.
Claim 4
Dependent Claim
52 words
The spray booth of claim 1 in which said baffle has a flange along each of its bottom edges, said flanges extending generally parallel to said side walls of said trough and being operable to direct air flow through said air flow passages and parallel to said side walls of said trough.
Claim 5
Dependent Claim
28 words
The spray booth of claim 1 in which said baffle has a handle attached and is portable and removable from said trough for purposes of cleaning said booth.
Claim 6
Dependent Claim
72 words
The spray booth of claim 1 in which said trough is generally W shaped when viewed in cross section so as to define a pair of generally parallel channels at the bottom of said trough, each channel being rounded at the bottom so as to provide a smoothly curved air flow path for a high velocity stream of air directed downwardly over the inside surface of the side walls of said trough.
Claim 7
Dependent Claim
40 words
The spray booth of claim 5 in which said bottom wall opening of said booth is located between said two bottom channels of said trough and has its peripheral edge spaced upwardly from the bottom of each of said channels.
Claim 8
Dependent Claim
72 words
The spray booth of claim 3 in which said trough is generally W shaped when viewed in cross section so as to define a pair of generally parallel channels at the bottom of said trough, each channel being rounded at the bottom so as to provide a smoothly curved air flow path for a high velocity stream of air directed downwardly over the inside surface of the side walls of said trough.
Claim 9
Dependent Claim
22 words
The spray booth of claim 1 which further includes means to adjust the velocity of air flow in said air flow passages.
Claim 10
Dependent Claim
115 words
The spray booth of claim 1 in which said bottom wall includes a plurality of openings for establishing communication between the interior of said booth and a pulverant material recovery system, said booth further including an exhaust manifold having a smoothly curved inside surface, a plurality of entrance ports into said exhaust manifold, each of said entrance ports being tangentially located relative to said curved inside surface of said exhaust manifold, a plurality of fluid conduits, each of said conduits connecting one of said bottom openings to one of said entrance ports of said exhaust manifold and being so sized and directed that pulverant material is introduced tangentially into said exhaust manifold from said conduits.
Claim 11
Dependent Claim
17 words
The spray booth of claim 9 in which said inside surface of said exhaust manifold is circular.
Claim 12
Dependent Claim
32 words
The spray booth of claim 10 in which said exhaust manifold entrance ports are circular and have a diameter which is no more than one-half the inside diameter of said exhaust manifold.
Claim 13
Dependent Claim
80 words
The spray booth of claim 1 which includes a plurality of open top troughs defined by said bottom wall and a plurality of bottom wall openings, each of said bottom wall openings entering into one of said troughs, said booth further including means to balance air flow from said openings so as to enable the quantity of air pulled through each opening into the pulverant material recovery system to be adjusted relative to the quantity pulled through any other opening.
Claim 14
Dependent Claim
33 words
The spray booth of claim 12 in which said air flow balancing means includes a plurality of plates having varying size openings therein and shaped so as to fit over said bottom openings.
Claim 15
Dependent Claim
66 words
The spray booth of claim 13 which further includes a vacuum attachment for cleaning said booth, said attachment comprising a vacuum plate having an opening therein, and shaped so as to fit over said bottom openings, a vacuum hose sealingly connected at one end to said opening in said vacuum plate, and a vacuum pick up nozzle sealingly attached to the opposite end of said hose.
Claim 16
Dependent Claim
170 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having at least one opening, said opening being adapted to establish communication between the interior of said booth and a pulverant material recovery system, said bottom wall defining at least one generally open top trough having downwardly and inwardly sloping side walls, and a baffle located within said trough, said baffle having generally upwardly and inwardly sloping side walls and having a flange along each of its bottom edges which extends parallel to and is spaced from said side walls of said trough so as to define passages for directing air flow parallel to and along said side walls of said trough so as to sweep pulverant material from said side walls.
Claim 17
Dependent Claim
170 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having at least one opening, said opening being adapted to establish communication between the interior of said booth and a pulverant material recovery system, said bottom wall defining at least one generally open top trough having downwardly and inwardly sloping side walls, and a baffle located within said trough, said baffle having generally upwardly and inwardly sloping side walls and having a flange along each of its bottom edges which extends parallel to and is spaced from said side walls of said trough so as to define passages for directing air flow parallel to and along said side walls of said trough so as to sweep pulverant material from said side walls.
Claim 18
Dependent Claim
72 words
The spray booth of claim 15 in which said trough is generally W shaped when viewed in cross section so as to define a pair of generally parallel channels at the bottom of said trough, each channel being rounded at the bottom so as to provide a smoothly curved air flow path for a high velocity stream of air directed downwardly over the inside surface of the side walls of said trough.
Claim 19
Dependent Claim
40 words
The spray booth of claim 16 in which said bottom wall opening of said booth is located between said two bottom channEls of said trough and has its peripheral edge spaced upwardly from the bottom of each of said channels.
Claim 20
Dependent Claim
42 words
The spray booth of claim 15 which further includes means for adjusting the clearance between said flanges of said baffle and said side walls of said trough so as to enable the velocity of air passing through said channels to be varied.
Claim 21
Dependent Claim
28 words
The spray booth of claim 18 in which said adjusting means includes screws which are threaded through said side walls and abut against said flanges of said baffle.
Claim 22
Dependent Claim
115 words
The spray booth of claim 15 in which said bottom wall includes a plurality of openings for establishing communication between the interior of said booth and a pulverant material recovery system, said booth further including an exhaust manifold having a smoothly curved inside surface, a plurality of entrance ports into said exhaust manifold, each of said entrance ports being tangentially located relative to said curved inside surface of said exhaust manifold, a plurality of fluid conduits, each of said conduits connecting one of said bottom openings to one of said entrance ports of said exhaust manifold and being so sized and directed that pulverant material is introduced tangentially into said exhaust manifold from said conduits.
Claim 23
Dependent Claim
17 words
The spray booth of claim 20 in which said inside surface of said exhaust manifold is circular.
Claim 24
Dependent Claim
32 words
The spray booth of claim 21 in which said exhaust manifold entrance ports are circular and have a diameter which is no more than one-half the inside diameter of said exhaust manifold.
Claim 25
Dependent Claim
153 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having at least one opening for establishing communication between the interior of said booth and a pulverant material recovery system, said bottom wall defining at least one generally long open top trough which is generally W shaped when viewed in cross section so as to define a pair of generally parallel channels at the bottom of said trough, each channel being rounded at the bottom so as to provide a smoothly curved air flow path for a high velocity stream of air directed downwardly over the inside surface of the side walls of said trough.
Claim 26
Dependent Claim
153 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having at least one opening for establishing communication between the interior of said booth and a pulverant material recovery system, said bottom wall defining at least one generally long open top trough which is generally W shaped when viewed in cross section so as to define a pair of generally parallel channels at the bottom of said trough, each channel being rounded at the bottom so as to provide a smoothly curved air flow path for a high velocity stream of air directed downwardly over the inside surface of the side walls of said trough.
Claim 27
Dependent Claim
40 words
The spray booth of claim 23 in which said bottom wall opening of said booth is located between said two bottom channels of said trough and has its peripheral edge spaced upwardly from the bottom of each of said channels.
Claim 28
Dependent Claim
115 words
The spray booth of claim 23 in which said bottom wall includes a plurality of openings for establishing communication between the interior of said booth and a pulverant material recovery system, said booth further including an exhaust manifold having a smoothly curved inside surface, a plurality of entrance ports into said exhaust manifold, each of said entrance ports being tangentially located relative to said curved inside surface of said exhaust manifold, a plurality of fluid conduits, each of said conduits connecting one of said bottom openings to one of said entrance ports of said exhaust manifold and being so sized and directed that pulverant material is introduced tangentially into said exhaust manifold from said conduits.
Claim 29
Dependent Claim
17 words
The spray booth of claim 25 in which said inside surface of said exhaust manifold is circular.
Claim 30
Dependent Claim
32 words
The spray booth of claim 26 in which said exhaust manifold entrance ports are circular and have a diameter which is no more than one-half the inside diameter of said exhaust manifold.
Claim 31
Dependent Claim
162 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed iNto the interior of said booth and said bottom wall having a plurality of openings for establishing communication between the interior of said booth and a pulverant material recovery system, said booth further including an exhaust manifold having a smoothly curved inside surface, a plurality of entrance ports into said exhaust manifold, each of said entrance ports being tangentially located relative to said curved inside surface of said exhaust manifold, a plurality of fluid conduits, each of said conduits connecting one of said bottom openings to one of said entrance ports of said exhaust manifold and being so sized and directed that pulverant material is introduced tangentially into said exhaust manifold from said conduits.
Claim 32
Dependent Claim
162 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed iNto the interior of said booth and said bottom wall having a plurality of openings for establishing communication between the interior of said booth and a pulverant material recovery system, said booth further including an exhaust manifold having a smoothly curved inside surface, a plurality of entrance ports into said exhaust manifold, each of said entrance ports being tangentially located relative to said curved inside surface of said exhaust manifold, a plurality of fluid conduits, each of said conduits connecting one of said bottom openings to one of said entrance ports of said exhaust manifold and being so sized and directed that pulverant material is introduced tangentially into said exhaust manifold from said conduits.
Claim 33
Dependent Claim
17 words
The spray booth of claim 28 in which said inside surface of said exhaust manifold is circular.
Claim 34
Dependent Claim
32 words
The spray booth of claim 29 in which said exhaust manifold entrance ports are circular and have a diameter which is no more than one-half the inside diameter of said exhaust manifold.
Claim 35
Dependent Claim
73 words
The spray booth of claim 28 which includes a plurality of open top troughs defined by said bottom wall, each of said bottom wall openings entering said one of said troughs, said booth further including means to balance air flow from said openings so as to enable the quantity of air pulled through each opening into the pulverant material recovery system to be adjusted relative to the quantity pulled through any other opening.
Claim 36
Dependent Claim
33 words
The spray booth of claim 31 in which said air flow balancing means includes a plurality of plates having varying size openings therein and shaped so as to fit over said bottom openings.
Claim 37
Dependent Claim
66 words
The spray booth of claim 32 which further includes a vacuum attachment for cleaning said booth, said attachment comprising a vacuum plate having an opening therein, and shaped so as to fit over said bottom openings, a vacuum hose sealingly connected at one end to said opening in said vacuum plate, and a vacuum pick up nozzle sealingly attached to the opposite end of said hose.
Claim 38
Dependent Claim
125 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having a plurality of bottom wall openings, said bottom wall openings being adapted to establish communication between the interior of said booth and a pulverant material recovery system, and means to balance air flow from said openings so as to enable the quantity of air pulled through each opening into the pulverant material recovery system to be adjusted relative to the quantity pulled through any other opening.
Claim 39
Dependent Claim
125 words
A spray booth for use in the coating of objects with pulverant material and for facilitating the recovery of surplus pulverant material, which booth comprises side walls, end walls, and a bottom wall, at least one of said side walls having an opening for a spray gun directed into the interior of said booth and said bottom wall having a plurality of bottom wall openings, said bottom wall openings being adapted to establish communication between the interior of said booth and a pulverant material recovery system, and means to balance air flow from said openings so as to enable the quantity of air pulled through each opening into the pulverant material recovery system to be adjusted relative to the quantity pulled through any other opening.
Claim 40
Dependent Claim
33 words
The spray booth of claim 34 in which said air flow balancing means includes a plurality of plates having varying size openings therein and shaped so as to fit over said bottom openings.
Claim 41
Dependent Claim
66 words
The spray booth of claim 35 which further includes a vacuum attachment for cleaning said booth, said attachment comprising a vacuum plate having an opening therein, and shaped so as to fit over said bottom openings, a vacuum hose sealingly connected at one end to said opening in said vacuum plate, and a vacuum pick up nozzle sealingly attached to the opposite end of said hose.
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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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |