Show case for keeping and exhibiting objects
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 28, 1990
Grant Date -
N/A
app pub date -
Feb 17, 1989
filing date -
Feb 19, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Show case (1) for keeping and exhibiting objects, the sides (4), the bottom (3) and the cover construction (2) of which encompass the interior of the show case more or less hermetically, wherein filter means (7) comprising preferably dust and/or gas protection filters and being accommodated in an air vent (5) clean air flowing into or being directed into said show case. When air flows in automatically due to changed pressure and temperature conditions inside and outside the show case, the show case is vented preferably through an air vent (6, 9) formed as an outlet valve. When it is impossible to seal the show case sufficiently, it will be ventilated forcibly with the least possible quantity of air by means of a pump or ventilating device connected to the interior of the show case through the filter means, which quantity of air is adapted to the air volumes flowing automatically into the show case when the air pressure increases suddenly or the temperature varies.
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