Cartridge for web-type media material
US4878581A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1988 |
| Grant date | Nov 7, 1989 |
| Priority date | — |
| Expiry date | Oct 17, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B27/588
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cartridge or cassette for light and pressure sensitive web-type media material includes a generally rectangular housing board received between a pair of identical housing ends, to retain a spool of such media material therein. The housing is formed with an exit opening in a front wall defined by an inwardly-extending flap parallel to the top forming a light-trap passage. Media material from the spool is guided through the light-trap passage with the outer pressure sensitive surface in noncontacting relation to the housing. The spool is formed with a central core which has an outer cylindrical surface free of discontinuities or irregularities. A pair of end flanges are received on the core having radial surfaces in close relation to the convolutions of the web. The housing ends are formed with annular inwardly-extending rings which terminate in close running relation to the adjacent outside surface of a spool end flange to support the media material and to prevent telescoping in the event the cartridge or cassette is mishandled or dropped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.