Guideplate assembly having substrate velocity control arrangement
US5402221A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1992 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Jul 31, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/00652
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging apparatus having a drive roller in an imaging zone includes a guideplate assembly for controlling the velocity of a substrate. The assembly has a guideplate with the inlet end disposed adjacent to a dispensing magazine and the outlet end disposed adjacent to the imaging zone. The guideplate assembly has a pushing finger movable therealong, a velocity-controlling sidewall and a spring-loaded biasing member disposed along opposed edges of the guideplate. The biasing member urges an edge of the substrate into frictional contact against a portion of the sidewall directly opposite the member while the pushing finger simultaneously engages the substrate to propel the substrate at a predetermined controlled velocity toward the outlet end of the guideplate against the frictional force imposed on the substrate by the sidewall. The predetermined controlled velocity is at least ninety percent of the rotational speed of the drive roller. Upon engagement with an idler roller in the imaging zone substantially no velocity perturbation is imparted to the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.