Paper feeder usable with a copier and others
US4770403A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1986 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Sep 12, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H43/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A paper feeder is disclosed which has a plurality of trays arranged one above another and a paper feed unit movable up and down to one of the trays selected. To control paper transport speed, a paper sensor is actuated prior to a level sensor during movement of the paper feed unit to a paper feed position, and a paper feed unit drive motor begins to be decelerated in response to an "on" signal of the paper sensor. The amount of papers remaining in any of the trays is detected by counting drive pulses applied to a pulse motor, which is adapted to drive the paper feed unit. After a power source has been turned on, the amounts of remaining papers in all the trays are detected and displayed prior to a copying operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.