摘要:
A gas-introduction system useful, for example, in biotechnology for supplying cells or microorganisms with oxygen. The gas-introduction system has a bubble column and a distributor. In the vessel there is situated a liquid medium which is to be supplied with gas. A vector is used as transport medium for the gas. The gas is introduced into the bubble column and here taken up by the vector. The vector is applied to the liquid surface via the distributor in droplet form, falls downward in the medium and releases to the medium some of the gas that has been taken up. At the bottom of the vessel is situated a collecting device in which the vector droplets coalesce and pass back into the bubble column. Disclosed are a bioreactor comprising the gas-introduction system and a method for introducing gas into a liquid medium, preferably an aqueous suspension containing cells or microorganisms.
摘要:
An apparatus for aligning sheet stacks in a feeder of sheet processing machines includes a motor-driven aligning plate and a movement converter situated between a motor drive and the aligning plate. The movement converter forces a movement describing approximately a circular path onto the aligning plate. A vertical speed component of the aligning plate during aligning corresponds to an upward speed of a feeder stack. A method for aligning sheet stacks in a feeder of a sheet processing machine as well as a sheet processing machine, are also provided.
摘要:
A feeder is provided for a punching or embossing apparatus. The feeder has a configuration for feeding sheets from a multiplicity of stacks. The stacks are disposed next to one another in the transport direction. In a method for punching or embossing sheets using a punching or embossing apparatus, sheets are fed to the punching or embossing apparatus from stacks disposed next to one another.