Variably changing nip feeding speeds to maintain optimal sheet buckle
US9108811B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2014 |
| Grant date | Aug 18, 2015 |
| Priority date | — |
| Expiry date | Oct 9, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2557/23
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Various methods and devices maintain a registration nip and a transfer nip at the same sheet feeding speed when the leading edge of a sheet is between them. These methods and devices create a buckle in the sheet by increasing the sheet feeding speed of the registration nip while maintaining the transfer nip at the original sheet feeding speed during a first portion of when the sheet is simultaneously within the registration nip and the transfer nip. Such methods and devices then decrease the sheet feeding speed of the registration nip after creating the amount of buckle in the sheet and maintain the registration nip and the transfer nip at the same sheet feeding speed to maintain that specific amount of buckle in the sheet during the remaining portion of when the sheet is simultaneously within the registration nip and the transfer nip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.