Side registration with subtle transverse corrugation
US4809968A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 21, 1988 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Mar 21, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00675
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Side registering a sheet during forward movement of the sheet with lateral movement of the sheet causing one side edge of the sheet to engage a registration edge guide, by moving the sheet with skewed rollers providing a sheet engaging and driving nip, wherein the registration edge guide is substantially in one plane but has a small localized arcuate deformation out of that plane adjacent the nip, causing localized arcuate deformation of the sheet, the nip also being spaced from the plane by a corresponding amount, the localized arcuate deformation of the edge guide and the spacing of the nip providing localized bending of a portion of the sheet at the nip for improved side registering. The registration edge guide is preferably substantially linear V-shaped slot engaging one edge of the sheet therein and directing it toward a smooth bottom comprising only a small portion of the slot and lying substantially in the plane except at the localized arcuate deformation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.