Sheet feeding apparatus
US4350328A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1980 |
| Grant date | Sep 21, 1982 |
| Priority date | — |
| Expiry date | Nov 10, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H1/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet feeding apparatus includes a pivotally disposed tray for supporting a stack of sheets thereon, a sheet feeding roller positionally fixed proximate the leading edge of the uppermost sheet of a stack on the tray, a biasing member for urging the tray in opposition to the fixed feeding roller so that the uppermost sheet of the stack is pressed into frictional contact with the roller, and a wedge-shaped supplemental displacement member of a relatively light specific gravity material disposed intermediate the tray and a sheet stack supported thereon to displace the tray with respect to the feeding roller by an amount greater than that displacement otherwise imparted to the tray by sheets stacked thereon so as to increase the frictional feeding force with which the uppermost sheet is pressed against the feeding roller by the biasing member and thereby facilitate feeding of sheets having properties that might otherwise interfere with normal feeding from the tray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.