B - Operations – Transporting – 01 – L
Patent
B - Operations, Transporting
01
L
18/680, 18/708,
B01L 3/00 (2006.01) B29C 45/00 (2006.01) B29C 45/26 (2006.01) C12M 1/22 (2006.01)
Patent
CA 2030680
ABSTRACT A Petri dish is disclosed in which the flat bottom is provided with a plurality of preferably radial ribs. The upwardly projecting portions of the ribs do not project more than about 0.050 inches above the upper surface of the bottom. Preferably, the ribs do not project more than about 0.030 inches above the upper surface of the bottom. The thickness of the bottom portion other than at the ribs is not greater than about 0.030 inches. Preferably, this thickness is not greater than about 0.025 inches. In the preferred embodiment, there are at least three radial ribs. Preferably, there are four ribs which are spaced 90 degrees from each other. A lid having the same basic structure may also be produced. The ribs need not necessarily be radial, nor need they necessarily be straight, but could be curved. Also, the ribs need not necessarily be continuous nor need they necessarily run all the way from the centre to the side wall or from side wall to side wall. The ribs could project downwardly instead of or in addition to upwardly. Generally, any suitable rib layout could be selected. A large number of ribs could be provided, if desired, though this is not a requirement.
Hall David
Zygo Mould Limited
LandOfFree
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