Sheet drive system having an encoder apparatus
US4979730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H7/02
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An envelope drive assembly for assuming displacement control over an envelope along a deck supported on a support assembly including a drive means for receiving the envelope traversing the deck and assuming displacement control over the envelope. The drive means has a shaft having a drive roller fixably mounted centrally around a portion of the shaft such that a radial portion of the drive roller extent into an opening in the deck. A motor drive is provided for rotating the shaft. A support member having at least one biasing roller rotatively mounted thereto is positioned radially opposite the drive roller. The support member is pivotally mounted and biased such that the biasing roller is biased against the drive roller. A processor controls the drive motor. A sensor is provided for sensing the presence of the leading and trailing edge of the envelope in the nip area of the biasing roller and drive roller and informing the processor thereof. An encoder wheel is rotatively mounted to the shaft for informing the processor of the change in displacement of the envelope in the drive means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.