Sheet-feeding mechanism
US4974680A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1989 |
| Grant date | Dec 4, 1990 |
| Priority date | — |
| Expiry date | Nov 6, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2511/224
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet-feeding mechanism comprises feed rollers attached to a first driving shaft and spaced from each other by a predetermined distance, two of the feed rollers being end feed rollers located at both ends of the first driving shaft. A pair of end ball rollers are attached to a second driving shaft and located in correspondence to the end feed rollers. A double-structure bail roller is attached to the second driving shaft in correspondance to the feed rollers, except for the end feed rollers. The double-structure bail roller includes an inner core and an outer layer having a small friction coefficient. The iner core is elastically deformable in a direction in which the end feed rollers are pressed against the corresponding bail rollers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.