Source: http://www.google.com/patents/US6669780?dq=7,346,545
Timestamp: 2015-05-25 03:34:01
Document Index: 167268492

Matched Legal Cases: ['arts 54', 'art 54', 'art 54', 'art 54', 'art 54', 'art 54', 'art 54', 'art 54', 'art 54', 'art 54']

Patent US6669780 - Color change booth - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA booth of a powder coating system is designed for quick color changes. The booth includes a bottom wall supported above a floor. An inner space of the booth is defined above the bottom wall and an equipment-receiving space is defined beneath the bottom wall. The bottom wall has an opening providing...http://www.google.com/patents/US6669780?utm_source=gb-gplus-sharePatent US6669780 - Color change boothAdvanced Patent SearchPublication numberUS6669780 B2Publication typeGrantApplication numberUS 09/982,581Publication dateDec 30, 2003Filing dateOct 18, 2001Priority dateOct 24, 2000Fee statusPaidAlso published asUS20020046701Publication number09982581, 982581, US 6669780 B2, US 6669780B2, US-B2-6669780, US6669780 B2, US6669780B2InventorsJames M. Browning, Timothy C. Buyck, James E. Johnson, Michael S. Smith, Michael J. ThiesOriginal AssigneeIllinois Tool Works Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (27), Referenced by (2), Classifications (19), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetColor change booth
US 6669780 B2Abstract
A booth of a powder coating system is designed for quick color changes. The booth includes a bottom wall supported above a floor. An inner space of the booth is defined above the bottom wall and an equipment-receiving space is defined beneath the bottom wall. The bottom wall has an opening providing communication between the inner space and the equipment-receiving space. The booth is adapted to receive a powder-recovery module beneath the bottom wall in the equipment-receiving space.
This patent application claims priority under 35 U.S.C. �119(e) to U.S. Provisional Patent Application Serial No. 60/242,937, filed Oct. 24, 2000, the disclosure of which is hereby incorporated herein by reference.
The present invention relates to a powder coating system and particularly, to a color change booth used in a powder coating system. More particularly, the present invention relates to a color change booth configured to permit recovery of powder that fails to adhere to objects being coated in the booth.
FIG. 11 illustrates a fragmentary sectional view of a portion of the booth and one of the powder-recovery carts, taken generally along section lines 11—11 of FIG. 10. FIG. 11 illustrates the air-powder mixture moving downwardly from an inner space of the booth into the separator assembly, recovered powder moving downwardly from the separator assembly into the hopper assembly, and air moving upwardly from the separator assembly into an air duct of the booth that overlies the separator assembly;
A powder coating system 30 includes a color change booth 10 in which objects 26 are coated with particles of powder 28. Powder coating system 30 also includes powder-recovery modules or carts 54 that are each individually insertable into an equipment-receiving space 24 provided by booth 10. Powder coating system 30 further includes a powder station 300, best illustrated in FIGS. 2 and 3, and powder applicators 42, best illustrated in FIGS. 1-3. Powder applicators 42 can be of any of a member of known types that electrostatically charge and spray powder 28 provided from powder station 300 toward objects 26 in booth 10. Air circulation equipment 258 of powder coating system 30 operates to create an air stream that flows through booth 10 and the cart 54 received in space 24. Some of the sprayed powder 28 adheres to objects 26 and some doesn't. The non-adherent powder 28 that becomes entrained in the air stream flowing through booth 10 forms an air-powder mixture 29. Air-powder mixture 29 flows from booth 10 into the powder-recovery cart 54 received in space 24 where powder 28 is separated from air-powder mixture 29 and returned to powder station 300 for reuse. When powder coating system 30 is changed from coating objects 26 with powder 28 of a first color to coating objects 26 with powder 28 of a second color, the cart 54 which has been used in the recovery of the powder 28 of the first color is exchanged for another cart 54 which will be used in the recovery of the powder 28 of the second color, and various components of powder coating system 30 are cleaned so that powder 28 of the first color is not inadvertently mixed with powder 28 of the second color.
As described previously, when powder coating system 30 is changed over from coating objects 26 with powder 28 of a first color to coating objects 26 with powder 28 of a second color, the cart 54 situated in equipment-receiving space 24 during powder coating operations with the powder 28 of the first color (hereinafter “first cart 54”) is removed from space 24 and a new cart 54 (hereinafter “second cart 54”) is moved into space 24. Prior to removal of first cart 54 from space 24, guns 48 of powder applicators 42 are turned off to permit one or more operators to perform certain cleaning operations as described below. In addition, conveyor 34 is operated to clear objects 26 out of booth 10.
It will be appreciated that other types of actuators, including electrically powered linear actuators, hydraulic actuators, motors, and other electromechanical devices in combination with transmission elements or linkages, may be used in lieu of pneumatic actuators. Thus, the term “actuator” or “actuators” as used in the specification and in the claims is intended to cover all of these types of actuators, as well as the equivalents thereof unless otherwise specified.
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