Paper feed system for a typewriter or the like
US4297045A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1979 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Sep 21, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J13/076
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A paper feed system for a typewriter has its rear feed rollers formed to have minimum shingling and prevent treeing when a plurality of sheets of paper is fed between the platen and the rear feed rollers by rotation of the platen. Each of the rear feed rollers includes an annular outer portion, which is formed of an elastomeric material having a hardness of 30 to 35 Shore A durometer, supported on a hub, which is non-flexible so as to be relatively rigid, having a pair of flanges on opposite sides of the annular outer portion. Each of the annular outer portions has its thickness equal to or less than its width with the spacing between adjacent annular outer portions being greater than the width of each of the annular outer portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.