| ITW GEMA GMBH Patent applications |
| Patent application number | Title | Published |
|---|
| 20110162579 | POWDER FEEDING METHOD, POWDER FEEDING APPARATUS AND ELECTROSTATICAL POWDER SPRAY COATING APPARATUS - A coating powder feed method, coating powder feeding device, electrostatic powder spraycoating apparatus containing such a coating powder feeding device. The invention includes a dense phase powder pump fitted with at least one feed chamber. A control signal to create a partial vacuum in the feed chamber is generated no earlier than simultaneously with, preferably by a predetermined delay time after, a control signal opening a powder intake valve of the feed chamber, as a result of which the beginning of partial vacuum buildup in the feed chamber shall take place no earlier than simultaneously with the initial opening of the powder intake valve or by a defined time delay after the opening of the powder intake valve. | 07-07-2011 |
| 20100243759 | POWDER SPRAY COATING DEVICE AND POWDER TRANSPORT DEVICE THEREFOR - The invention relates to a powder feed apparatus of a powder spraycoating equipment, containing a dense phase powder pump fitted with at least one feed chamber, preferably two feed chambers, alternatingly discharging coating powder, each feed chamber having one powder intake valve at a powder intake to aspirate coating powder during a suction stage and one powder outlet valve at a powder outlet to discharge coating powder during a discharge stage; further control valves to operate the dense phase powder pump; further an electric control unit containing at least one computer controlling the dense phase powder pump by means of said control valves, characterized in that a dependence mode of the total open time (t | 09-30-2010 |
| 20100221421 | POWDER SPRAY COATING METHOD AND DEVICE THEREFOR - A powder spraycoating method and powder spraycoating equipment. A dense phase powder pump is used. According to a predetermined conveying-air function in a control unit, different rates of compressed conveying air can be defined for different powder rates. In one predetermined total-air function in the control unit, the sum of total-air rate composed of the rate of compressed conveying air and of the rate of supplemental compressed air can be kept constant even if the rate of compressed conveying air changes. | 09-02-2010 |
| 20100213281 | FEEDING DEVICE FOR POWDER SPRAY COATING DEVICE - A powder spraycoating equipment's powder feed apparatus containing a dense phase powder pump fitted with at least one, preferably two feed chambers each of which comprises at one chamber end a powder intake valve and at the opposite chamber end a powder outlet valve and further comprises at least one air exchange aperture to alternatingly apply compressed conveying air or a partial vacuum to the feed chamber, characterized by an integral structural block, by the feed chambers being constituted in the structural block, by all those first control valves that are connected in fluid communication to the minimum of one feed chamber for the purpose of applying compressed conveying air and a partial vacuum to it, being configured at the structural block and being directly connected, in fluid communication and by means of ducts constituted in the structural block, to the minimum of one feed chamber. | 08-26-2010 |
| 20100212589 | POWDER SPRAYCOATING CONTROL SYSTEM AND ITS COMBINATION WITH POWDER FEEDING DEVICE OR WITH POWDER SPRAYCOATING DEVICE - A powder spraycoating control system and its combination with a powder pump or with a powder spraycoating unit. The control system contains an controller programmed to alternatingly operate a powder spraycoating unit in turn containing an injector serving as the powder pump or a powder spraycoating unit containing a dense phase powder pump serving as the powder pump. | 08-26-2010 |
| 20080257257 | Powder Spray Coating Device and Powder Feeding Device Therefor - Powder spraycoating equipment and powder supply system for same. The powder supply system comprises a closed or closable powder receptacle which is fitted with a cleaning fixture to remove residual powder from a powder chamber of the powder receptacle using compressed cleaning air. | 10-23-2008 |
