Sheet feeder
US5599015A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | Jun 28, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2801/06
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet feeder including at least a pair of variable outer diameter rollers and having a compact, simple and long life construction. The variable outer diameter roller includes a generally cylindrical pipe having four equally spaced penetrating holes radially disposed in its cylindrical wall, a sealing means having a diaphragm positioned adjacent each of the penetrating holes and fitted to the pipe support, and sliders forming a roller peripheral face fitted into each penetrating hole to be able to slide smoothly. Each slider is moved by diaphragms in a direction so the roller outer diameter expands by compressed air supplied through a fluid supply passage in a rotary axle which supports the roller. Exhausting the compressed air causes the roller outer diameter to decrease and restores the roller to its original size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.