Fluid flow web tension device for roll-to-roll processing
US12157650B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2020 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Jan 1, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2406/113
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A web tension device includes a pressure source and a stationary housing. A translatable unit is translatable into and out of a cavity of the housing and includes an inlet that is connectable to the pressure source. A distal end of the translatable unit includes a tensioning surface with openings to enable outflow of pressurized fluid to apply a pushing force to a web in a roll-to-roll process. Proximal openings enable outflow of the fluid into a gap between the housing and the translatable unit. When tension of the web is reduced, an outward force that is exerted by pressure in the gap pushes the translatable unit outward, pushing the web outward until an inward force that is exerted by the web balances the outward force. When tension of the web increases, the inward force pushes the translatable unit inward until the inward force is balanced by the outward force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.