Method for cold film transfer with dynamic film tensioning
US8206527B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2010 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Sep 13, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41P2219/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A cold film transfer method with dynamic film tensioning guides a film web intermittently through a transfer nip with dancers to use less film web. The intermittent drive and action of a transfer cylinder channel result in undesired fluctuations in film tension or web force, which directly affect dancer motors. A control system is used to avoid high loads on the motors and the web. A control circuit acts on the dancer movement, a first process variable is mapped in the control circuit and the first process variable is a function of a force acting on the dancers as a result of the transfer film or is a function of the actual current movement profile of the dancers. A measure for web tension is calculated as a function of the first process variable and/or the amplitude of the web tension is at least limited by the control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.