Patent ID: 6302353
Filing Date: 2001-10-16
Classification: B65H

Abstract:
A turning bar apparatus comprising:a stationary turning bar assuming a form of a hollow cylinder and adapted to change a running direction of a web looped therearound, the turning bar having a plurality of air outlet openings formed in a plurality of rows and along a longitudinal direction of the turning bar such that the air outlet openings extend through a wall of the turning bar between a hollow interior of the turning bar and an outer circumferential surface of the turning bar; anda compressed-air supply unit for supplying compressed air into the hollow interior of the turning bar,wherein the rows of air outlet openings are not located at a web-looping-region upstream-end-portion, which is a circumferential position of the turning bar where the web running toward the turning bar begins to be looped around the turning bar, at a web-looping-region downstream-end-portion, which is a circumferential position of the turning bar where the web looped around the turning bar begins to leave the turning bar, or at a web-looping-region center-portion, which is a circumferentially center position of the turning bar between the web-looping-region upstream-end-portion and the web-looping-region downstream-end-portion; andat least a single row of air outlet openings is arranged in each of a web-looping-region upstream-portion extending between the web-looping-region upstream-end-portion and the web-looping-region center-portion and a web-looping-region downstream-portion extending between the web-looping-region-center portion and the web-looping-region downstream-end-portion.