Web processing device
The present invention provides a web processing device comprising: a coating unit which coats a long strip of web by using a bar having in an axial direction at least two spiral grooved portions differing in the spiraling direction of the spiral groove; and a cutting unit which cuts the coated web in the lengthwise direction in a coating position along the boundary between the two spiral grooved portions. By using the bar having two spiral grooved portions, any foreign matter can be quickly shoved out to prevent it from inviting a seam flaw and, moreover, the adverse effect of any seam flaw occurring along the boundary between the two spiral grooved portions can be eliminated, with the result that high-quality processed webs can be manufactured at a high yield.
1 . A web processing device comprising:
a coating unit which coats a long strip of web by using a bar having in an axial direction at least two spiral grooved portions differing in the spiraling direction of the spiral groove; and
a cutting unit which cuts the coated web in the lengthwise direction in a coating position along the boundary between the two spiral grooved portions.
2 . The web processing device according to claim 1 , wherein the coating unit is provided with a coating position adjusting device which adjusts a coating position in a widthwise direction of the web by shifting in the bar or the web relative to the widthwise direction of the web.
3 . The web processing device according to claim 1 , wherein the cutting unit is provided with a cutting position adjusting device which adjusts a cutting position in the widthwise direction of the web according to the coating position in the widthwise direction of the web in the coating unit.
4 . The web processing device according to claim 1 , wherein the boundary between the spiral grooved portions is so formed as not to let the spiral grooves overlap each other.
5 . The web processing device according to claim 1 , wherein the boundary between the spiral grooved portions is so formed as to overlap each other on the boundary between the grooved portions and the length of the overlapping part is kept not less than 10 mm but not more than 30 mm in the axial direction of the bar.
6 . The web processing device according to claim 1 , wherein the bar is formed by joining together rods at the end face in which spiral grooves differing in spiraling direction are cut.
7 . The web processing device according to claim 2 , wherein the cutting unit is provided with a cutting position adjusting device which adjusts a cutting position in the widthwise direction of the web according to the coating position in the widthwise direction of the web in the coating unit.
8 . The web processing device according to claim 2 , wherein the boundary between the spiral grooved portions is so formed as not to let the spiral grooves overlap each other.
9 . The web processing device according to claim 2 , wherein the boundary between the spiral grooved portions is so formed as to overlap each other on the boundary between the grooved portions and the length of the overlapping part is kept not less than 10 mm but not more than 30 mm in the axial direction of the bar.
10 . The web processing device according to claim 2 , wherein the bar is formed by joining together rods at the end face in which spiral grooves differing in spiraling direction are cut.
11 . The web processing device according to claim 3 , wherein the boundary between the spiral grooved portions is so formed as not to let the spiral grooves overlap each other.
12 . The web processing device according to claim 3 , wherein the boundary between the spiral grooved portions is so formed as to overlap each other on the boundary between the grooved portions and the length of the overlapping part is kept not less than 10 mm but not more than 30 mm in the axial direction of the bar.
13 . The web processing device according to claim 3 , wherein the bar is formed by joining together rods at the end face in which spiral grooves differing in spiraling direction are cut.
14 . The web processing device according to claim 7 , wherein the boundary between the spiral grooved portions is so formed as not to let the spiral grooves overlap each other.
15 . The web processing device according to claim 7 , wherein the boundary between the spiral grooved portions is so formed as to overlap each other on the boundary between the grooved portions and the length of the overlapping part is kept not less than 10 mm but not more than 30 mm in the axial direction of the bar.
16 . The web processing device according to claim 7 , wherein the bar is formed by joining together rods at the end face in which spiral grooves differing in spiraling direction are cut.