Sheet supply detector and indicator
US4319742A · kind A · utility
21Cited by
7References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 23, 1980 |
| Grant date | Mar 16, 1982 |
| Priority date | — |
| Expiry date | Jun 23, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S271/901
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A device for detecting and indicating a depletion of the supply of sheets in a sheet feeder of the type having a lifting arm used to lift the sheets toward a feeding member. The device utilizes the increased movement of the lifting arm due to the depleting stack to energize an indicator. The device also has the capability of utilizing magnetic members to latch the indicator in an energized condition until the supply of sheets is replenished, which then automatically de-energize the indicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.