Data card cassette
US4700840A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Feb 14, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A cassette having a drawer composed of a rigid support shelf and one or two data cards mounted to the shelf, and a rigid cassette case having sides defining a slot at a front end in the case for edgewise insertion of the drawer into the case. The drawer has at least one and preferably two holes at a front end therein coinciding with notches in sides of the case. A boss on either the drawer or the case is received by a groove in the other when the cassette is closed, thereby forming a detent. A second boss and groove may be provided on the opposite side. Each data card may be composed of a thin backing sheet adhered to the shelf, a strip of laser recording material disposed on the backing sheet and a transparent scratch-resistant plastic cover disposed over the strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.