Tape cassette
US4706149A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1985 |
| Grant date | Nov 10, 1987 |
| Priority date | — |
| Expiry date | Sep 10, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/26
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a tape cassette, which comprises a cassette casing which consists of upper and lower halves which are molded by injection molding from a synthetic resin, reels mounted for rotation in the cassette casing and having at least lower flanges, and a groove formed in an outer surface of a bottom wall of the lower half in a region which is adjacent the lower flanges of the reels, an improvement comprises at least a projection being formed on at least a portion of an inner surface of the bottom wall of the lower half which overlies the guide groove so as to facilitate a flow of a molten resin injection near the guide groove during molding of the lower half.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.