Related to this, Graf mentioned a 1940 paper which must have included a similar description of a wire-mesh cage.
In order to accelerate the delousing of clothing, special chambers were installed that operated according to the so-called Degesch Circulation Procedure. In these chambers, the Zyklon-B cans were opened by means of a mechanism operated from outside. The pellets fell into a cage, onto which a fan blew warm air; this caused the swift evaporation of the hydrogen cyanide, and quickly spread the toxic vapors throughout the entire chamber (Peters/Wüstinger 1940).
Auschwitz: Eyewitness Reports and Perpetrator Confessions of the Holocaust by Jürgen Graf, p.77