SHEET STABILIZER WITH SUCTION NOZZLE HAVING CENTER PROTRUSION

摘要

This invention is related to suction nozzles having a center protrusion for stabilizing a continuous web for various web property measurements. Suction nozzles blow air out of the nozzle, yet produce a vacuum proximate thereto. Two nozzles are disclosed, a single sided sheet-contact stabilizer and a non-contact sheet stabilizer. An air-bearing may be formed between the end surface of the center protrusion and the moving web.

主权项

1. A web stabilizer for stabilizing a moving web, the stabilizer comprising:
a nozzle body including a first surface facing the web; a protrusion including a second surface facing the web, said second surface being offset from said first surface and including at least one orifice; an air chamber located within said nozzle body and including at least one air inlet port that directs compressed air into said air chamber; an annular opening formed between said protrusion and said first surface and in fluid communication with said air chamber; an insert including an insert chamber that is in fluid communication with said at least one orifice and receiving pressurized air therein; and wherein compressed air evacuates said air chamber through said annular opening and wherein compressed air evacuates said insert chamber through said at least one orifice.