Liquid applicator for cut sheets
US6176180A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1998 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Apr 27, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41F23/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed a liquid application system for the printing, copying, imaging, converting, and related industries, and more particularly a liquid applicator means for applying moisture and coatings to cut sheets using a system of rolls and controlling surfaces, speeds, pressures, and directions of rotation of same relative to successive sheets passing through the system. In the use of the method and apparatus herein described, the liquid applied to the sheet is supplied from a reservoir or other liquid supply source to the nip between a smooth, resilient surfaced metering roll and a smoothly finished hydrophilic transfer roll. An abundant supply of liquid is supplied at the nip between the rolls which is metered by pressure contact between the resilient surfaced metering roll and the transfer roll to an exactly controlled film which adheres to the surface of the transfer roll, which rotates into contact with a cut sheet to apply the liquid thereto. A backup roll serves to propel the sheet through a pressure nip formed between the transfer roll surface and the surface of the backup roll. Sheet guides and feed rolls carry the sheets to and away from the pressure nip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.