Multiple document detector
US5011127A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1990 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Jan 17, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2701/1912
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A multiple document detector uses a driven wheel (40) opposed by an idler wheel (44) on a castoring arm (60). The wheels (40,44) each have a coefficient of friction against a document greater than the coefficient of friction of a document against another document. When a sensor (14A,14B) senses the presence of a document (26) a solenoid (70) operates to attract a magnetic slug (58). If only one document (26) is present the idler wheel (44) stays in a preferred position. If two documents are present the solenoid (70) has sufficient force to cause the idler wheel (44) to push one document (26) to slide against another. In doing so the movement of the idler wheel (44) is detected by a microswitch (18) which signals the presence of multiple documents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.