Active center pivot device for controlling sheet tension and method of using same
US-9309081-B2 · Apr 12, 2016 · US
Web tension control
US11117771B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11117771-B2 |
| Application number | US-202016970472-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 31, 2020 |
| Priority date | Jan 31, 2019 |
| Publication date | Sep 14, 2021 |
| Grant date | Sep 14, 2021 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The current invention is generally directed to apparatuses and methods for controlling tension and tension disturbances in a web being continuously unwound from a roll of spirally wound web material. In accordance with the present disclosure, a rotary dancer mechanism is used for applying active and variable forces to a moving web in response to irregularities, such as variations in tension. In one aspect, the apparatus and method of the present disclosure may be used to attenuate undesired disturbances in the web as the web is being fed into a process.
First claim
Opening claim text (preview).
What is claimed is: 1. An apparatus for unwinding a web comprising: a. a roll of spirally wound web material; b. a first motor for rotating the roll of spirally wound web material; a rotary dancer mechanism for controlling the tension of web material unwound from the roll of spirally wound web material comprising a rotatable arm having a longitudinal axis and first and second ends, a non-driven roller disposed on rotatable arm and movable along the longitudinal axis, a counterweight disposed on the rotatable arm opposite of the non-driven roller and movable along the longitudinal axis; and a second motor attached to the rotatable arm by a shaft, wherein the arm is rotatable about the shaft 360° and the second motor is configured to supply a controllable amount of torque to the arm and d. a position sensor configured to sense the position of the rotatable arm. 2. The apparatus according to claim 1 further comprising a load cell and a controller, wherein the controller is in communication with the second motor and the load cell and configured to sense the tension of web material unwound from the roll upon exiting the rotary dancer mechanism. 3. The apparatus of claim 2 , wherein the controller is configured to control the amount of torque applied to the arm. 4. The apparatus of claim 2 , wherein the controller is configured to control the position of the non-driven roller along the longitudinal axis of the arm.
Assignees
Inventors
Classifications
strip, tape, narrow web · CPC title
Tensile forces · CPC title
and controlling web tension · CPC title
Orientation, e.g. with respect to direction of movement · CPC title
relative to diameter, eccentricity or circularity · CPC title
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Frequently asked questions
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- What does patent US11117771B2 cover?
- The current invention is generally directed to apparatuses and methods for controlling tension and tension disturbances in a web being continuously unwound from a roll of spirally wound web material. In accordance with the present disclosure, a rotary dancer mechanism is used for applying active and variable forces to a moving web in response to irregularities, such as variations in tension. In…
- Who is the assignee on this patent?
- Kimberly Clark Co
- What technology area does this patent fall under?
- Primary CPC classification B65H23/048. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 14 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).