(under subclass 279) Infusion apparatus in which means are provided to vary or adjustably determine the duration or character of contact between the infusible material and the infusing fluid, other than by manipulation of the infusible material or the supply of infusing fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
282, and 283, for automatic control of the infusive contact.
292, 293, 296, 305, and 306, and any indented subclass, for control of the infusive contact by regulation of the time or rate of supply of infusing fluid.
297, and 318+, for control of the infusive contact by manipulation of the infusible material.
