IMPROVED PARTICULATE MATERIAL APPLICATION SYSTEM
First Claim
1. A material application system comprising:
- a dense phase pump having an output connectable to a material inlet of a material applicator;
said material applicator comprising a feed tube from an inlet end to an outlet end; and
an air cap at an outlet end of the applicator for directing air at a flow of material exiting the applicator outlet end.
1 Assignment
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Accused Products
Abstract
A material supply for a material application system such as a powder coating application system includes a feed hopper in the form of a duct. The duct is connectable to negative pressure during a color change process and is disconnected from the negative pressure during a spray application process. The negative pressure can be provided from a powder overspray recovery system such as an after filter blower. Dampers are provided to control air flow through the hopper duct and to allow the duct to be at ambient pressure during a supply mode of operation. The hopper duct also includes a suction interface for pumps, in the form of a siphon ring, as well as a fluidizing function. A removable sieve is provided with an optional vibration feature. Powder may be added to the duct via an access door or transfer pumps for new powder and/or reclaimed powder overspray.
60 Citations
32 Claims
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1. A material application system comprising:
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a dense phase pump having an output connectable to a material inlet of a material applicator;
said material applicator comprising a feed tube from an inlet end to an outlet end; and
an air cap at an outlet end of the applicator for directing air at a flow of material exiting the applicator outlet end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In a material application system of the type including a pump and a spray gun, the improvement comprising:
the pump being a dense phase pump, the spray gun having an uninterrupted material flow path therethrough from an inlet to an outlet, an air cap at the gun outlet to apply a flow of air to material exiting said outlet, and a control circuit for adjusting the flow of pattern air from said air cap to adjust a spray pattern of material from the gun. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A material application system comprising:
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a dense phase pump having an output connectable to a material inlet of a material applicator;
said material applicator comprising a feed tube from an inlet end to an outlet end;
a spray booth and a material overspray recovery system for removing material overspray from the booth, a supply of material, said supply comprising a duct that is connectable to said recovery system and a fluidizing bed, wherein material flows from said duct through said pump and applicator completely in a dense phase. - View Dependent Claims (18, 19)
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20. A particulate material application system comprising:
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an applicator pump having a pump chamber, a source of negative air pressure connectable to said pump chamber to draw particulate material into said pump chamber, and a source of positive air pressure connectable to said pump chamber to discharge particulate material from said pump chamber, said pump having an outlet;
a particulate material applicator having a material inlet which is connected to said outlet of said applicator pump, said material applicator having an outlet; and
an air cap being positioned at said outlet for directing air at a flow of particulate material exiting said applicator outlet. - View Dependent Claims (21, 22, 23, 24, 26, 27, 28, 29, 30, 31, 32)
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25. The system of claim to 24 wherein when said fluidizing plate is removed, said supply chamber is connectable to a source of negative air pressure to pull air through said bottom of said supply chamber.
Specification