1. A lid for closing a centrifuge rotor, wherein the lid comprises a form-fitting, rotation-actuated closure mechanism, and wherein the closure mechanism is capable of moving automatically into a closed position when positioned on the centrifuge rotor by virtue of the intrinsic weight of the lid.
2. The lid according to claim 1, wherein the closure mechanism is rotationally actuated about a substantially vertical axis.
3. The lid according to claim 1, wherein the closure mechanism is a thread.
4. The lid according to claim 3, wherein the closure mechanism is a multi-turn thread.
5. The lid according to claim 1, wherein the closure mechanism comprises a locking means for placing the lid into a completely closed position.
6. The lid according to claim 5, wherein the locking means is form-fitting.
7. The lid according to claim 1, wherein the closure mechanism is a bayonet.
8. The lid according to claim 1, wherein the closure mechanism is arranged centrally on the lid.
9. The lid according to claim 1, wherein the closure mechanism has a rotary knob.
10. The lid according to claim 1, wherein the closure mechanism is capable of being actuated single-handedly.
11. The lid according to claim 1, wherein the closure mechanism is designed to provide an acoustic indication that the lid is in the closed position.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An ordered liquid crystalline phase cleansing composition comprising:
a. at least about 1% by wt. of a non-soap anionic surfactant;
b. at least about 0.1% by wt. of an amphoteric surfactant;
c. an effective amount of an ordered liquid crystalline phase inducing structurant for inducing liquid crystal structure formation in said cleansing composition;
d. wherein the density of said cleansing composition is in the range of about 0.5 to 1.2 gmscm3 at 25\xb0 C.;
e. a water soluble or dispersible thickening agent selected from proteins, mono, di, oligo and polysaccharides; cellulosic materials, gums, clays, or blends or derivatives thereof;
f. a yield point in the range of about 3 to 100 Pascals at 25\xb0 C.;
g. wherein the volume percent of air suspended in the composition is about 10 to 60%; and
h. wherein the composition is stable at 50\xb0 C. temperature for 14 days without noticeable phase separation or a decrease in viscosity of more than about 20% or both.
2. The cleansing composition of claim 1 wherein the liquid crystalline phase inducing structurant is selected from a C8 to C24 alkenyl or branched alkyl fatty acid or ester thereof with a melting point below 25 C, a C8 to C24 alkenyl or branched alkyl fatty alcohol or ether thereof with melting point below 25 C, a C5 to C12 alkyl fatty acid; and trihydroxystearin.
3. The cleansing composition of claim 1 further comprising a cationic skin feel agent.
4. The cleansing composition of claim 1 further comprising a hydrophilic and a hydrophobic emollient.
5. The cleansing composition of claim 4 wherein the particle size range of the hydrophobic emollient is in the range of about 1 to 1000 microns.
6. The cleansing composition of claim 1 wherein the ratio of the anionic to amphoteric surfactant is in the range of about 10:1 to 1:1.
7. The cleansing composition of claim 1 wherein the composition has lamellar structure.
8. The cleansing composition of claim 1 where the pH of the composition is in the range of about 4.5-8.0.
9. The cleansing composition of claim 1 wherein the composition contains less than about 5% by wt. of soap.