Sheet media handling apparatus
US5379999A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Jul 23, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H5/22
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet media handling apparatus includes an air plenum having a first set of openings for passing air in the vicinity of a sheet media being handled and a second opening; and a fan including a flat brushless DC motor mounted adjacent the second opening and a centrifugal impeller attached to the motor and positioned so as to move air through the second opening when rotated by the motor. A pressure sensor connected to the motor drive circuit controls the speed of the motor in an inverse relationship to atmospheric pressure so that sufficient air pressure is provided for the sheet handling apparatus while minimizing the noise generated by the apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.