Molded magnetic tape cassette case having improved gate mark location
US4646916A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1985 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Sep 30, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/0027
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a case for holding a magnetic tape cassette comprising a lid and an inner enclosure formed of a planar bottom wall portion having a pair of spool stops projecting inwardly from its inner side and edge walls formed along the periphery of the bottom portion excepting a part of it and extending perpendicularly to that portion, one of the edge walls being formed with a thumb recess, the inner enclosure is made by a mold with a gate inlet so that the bottom portion has a gate mark on its outer side at a point where that portion meets the edge wall formed with the thumb recess, at a right angle to it, and underneath the recess. The planar bottom portion and peripheral edge walls are molded together in one piece. The gate mark is located at the point on an extension of a line intersecting the midpoint of a straight line that connects the two spool stops, on the outer side of the planar bottom portion, and extending at right angles to the straight line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.