Patent ID: 7451902
Filing Date: 2008-11-18
Classification: B65H,G03G

Abstract:
1. A web transporting mechanism of a printing apparatus for forming an image on a web to be transported comprising: a transporting section for forming the image on the web; web transporting means for transporting the web from the transporting section; a web discharging mechanism located in a rear portion of the transporting section, for discharging the web on which the image is transported in the transporting section; and a buffer mechanism giving a tension to the web, and absorbing a fluctuation of a web length from the transporting section to the web discharging mechanism generated by a difference between a web transporting speed of the transporting section and a web transporting speed of the web discharging mechanism, wherein the buffer mechanism includes a movable buffer, a position of which is changed according to the web length, wherein the web transporting mechanism includes at least one brake member, located in the buffer mechanism, for suppressing a motion of the movable buffer, and wherein drive means is provided in the brake member, wherein, before a transporting of the web is started, the brake member suppresses the motion of the movable buffer to reduce a shock generated immediately after a start of said transporting, and wherein a suppression of the movable buffer by the brake member is released after said transporting is started.