Processing system and control method for handling continuous sheet of material

Patent metadata

Field	Value
Publication number	US-11472173-B2
Application number	US-202016823283-A
Country	US
Kind code	B2
Filing date	Mar 18, 2020
Priority date	Sep 19, 2017
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

A web processing system which includes two rollers configured to rotate at the same phase while being in contact with a web which continuously exists along a movement passage and a suppressing mechanism for suppressing a tension variation of the web between the two rollers.

First claim

What is claimed is:

1. A high-precision web processing system comprising:
a first roller and a second roller configured to rotate at a same phase while being in contact with a web, which is continuous along a movement passage; and
a first drive motor configured to drive the first roller and a second drive motor configured to drive the second roller
a suppressing mechanism for suppressing a variation in a tension of the web between the two rollers, the variation in tension arising of the first drive motor and the second drive motor,
wherein the suppressing mechanism includes a dancer roller configured to come into contact with the web between the two rollers, wherein the suppression mechanism applies and then maintains a reference pressure to control the position of the dancer roller, and
wherein the reference pressure is obtained by detecting a pressure when the dancer roller is maintained at a certain position while in contact with the web while the web is being transported.

2. The high-precision web processing system according to claim 1 ,
wherein the suppressing mechanism is configured such that a path length of the web between the two rollers changes when the tension of the web between the two rollers is varied.

3. The high-precision web processing system according to claim 1 , wherein
the suppressing mechanism includes:
an actuator that applies a force to the dancer roller; and
a control unit that controls the actuator, wherein
the control unit controls the actuator to cause the dancer roller be in a position to maintain the reference pressure in the suppressing mechanism.

4. The high-precision web processing system according to claim 1 , wherein
the suppressing mechanism includes:
a hydraulic actuator having a rod connected to the dancer roller; and
a control unit that controls the position of the dancer roller to maintain the reference pressure by controlling the hydraulic actuator, wherein
the control unit controls a pressure in the hydraulic actuator to the reference pressure, wherein the reference pressure is obtained by detecting a pressure in the hydraulic actuator when the control unit controls the hydraulic actuator to the dancer roller to be kept at a certain position while the web is being transported.

5. The high-precision web processing system according to claim 1 , wherein the tension of the web is continuously adjusted throughout the entire length of the web.

6. A high-precision web processing system comprising:
two rollers configured to rotate at a same phase while being in contact with a web which is continuous along a movement passage; and
a suppressing mechanism for suppressing a variation in a tension of the web between the two rollers, the variation in tension arising due to wind disturbances,
wherein the suppressing mechanism includes a dancer roller configured to come into contact with the web between the two rollers, wherein the suppression mechanism applies and then maintains a reference pressure to control the position of the dancer roller, and
wherein the reference pressure is obtained by detecting a pressure when the dancer roller is maintained at a certain position while in contact with the web while the web is being transported.

7. A control method of a web processing system including
two rollers that are configured to rotate at the same phase while being in contact with a web which is continuous along a movement passage; and
a dancer system that includes:
a dancer roller disposed between the two rollers,
an actuator with a rod,
a tip of the rod is connected to the dancer roller,
a position sensor that detects a position of the rod,
a pressure sensor that detects a pressure in the actuator, and
a control unit;

the method comprising:
first, controlling the rod to maintain a certain position based on a detected value from the position sensor, wherein the control unit records the pressure detected by the pressure sensor as a reference pressure; and
second, the control unit controls the actuator to maintain the reference pressure, with reference to a detected value from the pressure sensor.

Assignees

• Sumitomo Heavy Industries
• Asahi Chemical Ind

Inventors

• Miyoshi Kiyoto
• Ando Takatora
• Suzuki Keita
• Matsubara Shinya
• Hitomi Taishi
• Ikeda Makoto

Classifications

• B41F3/06

  continuously · CPC title

• B65H23/048

  by positively actuated movable bars or rollers · CPC title

• B41F9/003

  Web printing presses (B41F9/023 takes precedence) · CPC title

• B65H23/044

  Sensing web tension (B65H23/06, B65H23/18 take precedence) · CPC title

• B41F27/1237 Primary

  by translatory motion substantially perpendicular to support surface · CPC title