Film handling apparatus blower system
US4019815A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1975 |
| Grant date | Apr 26, 1977 |
| Priority date | — |
| Expiry date | Mar 26, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film handling apparatus blower system. The system includes a blower having a high-pressure, low-volume section and low-pressure, high-volume section. The high-pressure, low-volume section is a scroll-type centrifugal blower with a circular impeller of cellular material to minimize discernible noise, an axial intake port, and a high-pressure outlet port. The high-pressure outlet port is coupled to a duct which directs the output high-pressure air flow into a film cassette. The low-pressure, high volume section is also a scroll-type centrifugal blower having a bladed fan wheel, an axial intake port, and three low-pressure outlet ports. One low-pressure outlet port is coupled to a duct which directs output air flow to a location for flow adjacent the rearward portion of a projection lamp. A second low-pressure outlet port is coupled to a duct which directs output air flow to a location for flow adjacent the frontal portion of the projection lamp. A third low-pressure outlet port is coupled to a duct which directs output air flow across the AC drive motor of the film handling apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.