公开(公告)号：US3635340A

公开(公告)日：1972-01-18

申请号：US3635340D

申请日：1969-01-31

Applicant: F I N D INC

Inventor： DUNN JOHN P

IPC: B03C7/04

CPC classification number: B03C7/04 ,  Y10S101/37

Abstract: The transfer of powder particles of the type which are capable of movement in an electric field which is created by applying potential between two spaced electrodes. The particles are charged and propelled from the first electrode towards the second electrode and due to the particle momentum, they can travel through the second electrode if it is apertured and beyond the second electrode if it is not apertured. Once the particle travels past the second electrode it may be utilized for various useful purposes such as electrostatic printing, particle classifying, or transfer to a series of successively arranged electrodes as in a particle pump.

Abstract translation: 能够在通过在两个间隔开的电极之间施加电位而产生的电场中能够移动的类型的粉末颗粒的转移。 颗粒从第一电极向第二电极充电并推进，并且由于颗粒动量，如果它们是多孔的并且超过第二电极，则它们可以穿过第二电极，如果它不是有孔的。 一旦粒子行进通过第二电极，它可以用于各种有用的目的，例如静电印刷，颗粒分级或转移到一系列连续排列的电极，如在颗粒泵中。

公开(公告)号：US3558052A

公开(公告)日：1971-01-26

申请号：US3558052D

申请日：1968-10-31

Applicant: F I N D INC

Inventor： DUNN JOHN P

IPC: B05B5/03 ,  B05B5/16 ,  B05B7/14 ,  B05B5/02

CPC classification number: B05B7/1468 ,  B05B5/032 ,  B05B5/1683 ,  B05B7/1477

Abstract: Dry nonconductive powder passes from a hopper by means of a vibrating plate through an adjustable, nonclogging eductor and is directed by means of a current of air issuing through a rectangular orifice from a variable volume plenum chamber into a venturi. The powder particles pass into the entrance of the venturi in a stream of air having a rectangular flow pattern or cross section and from the venturi through a discharge nozzle and from the discharge nozzle onto a substrate to be coated. Corona wires are located in the proximity of the issuing end of the discharge nozzle so as to charge the powder particles in order to direct them onto a substrate. A positive draft is maintained downstream from the venturi entrance and serves to pick up excess powder particles which are pneumatically conveyed back to the feed hopper.