US PATENT SUBCLASS 241 / 227
.~.~.~.~ Both cooperating surfaces rotate (e.g., roll mills)

Current as of: June, 1999
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241 /   HD   SOLID MATERIAL COMMINUTION OR DISINTEGRATION

*  DD  APPARATUS {41}
198.1  DF  .~ Cooperating comminuting surfaces (e.g., jaw crusher) {5}
220  DF  .~.~ Rotary surface (or surfaces) {2}
221  DF  .~.~.~ Circumferential or tangential flow of material (e.g., roll mills or roll and concave mills) {7}
227.~.~.~.~ Both cooperating surfaces rotate (e.g., roll mills) {4}
228  DF  .~.~.~.~.~> Internal comminuting surface
229  DF  .~.~.~.~.~> Surfaces rotate in same direction and/or mounted on non-horizontal axis
230  DF  .~.~.~.~.~> Adjustably or yieldably mounted rotary surface {3}
235  DF  .~.~.~.~.~> Cooperating non-smooth surface characteristic {1}

DEFINITION

Classification: 241/227

(under subclass 221) Apparatus in which both of the cooperating surfaces rotate.

(1) Note. The devices classified in this group are those generally termed "roll mills". Devices in a number of classes treat material between rotating roll members for various purposes. A partial list of analogous devices will be found under "Search Class" below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

113, for devices in which plural rotary surfaces cooperate with each other as well as a common surface.

143+, and 159, for plural devices of this type.

187, for such devices in which the cooperating surfaces are rotary striking members. SEE OR SEARCH CLASS

68, Textiles: Fluid Treating Apparatus,

99, and 244+.

72, Metal Deforming, appropriate subclasses.

99, Foods and Beverages: Apparatus,

520, 574, 584, 620, 624, and 627 for cooperating, rotating or moving surfaces used to separate a food item.

100, Presses,

155+, and see the notes thereto for roll type presses not elsewhere classified.

222, Dispensing,

281,.

425, Plastic Article or Earthernware Shaping or Treating: Apparatus,

363+,. 451, Abrading,

194+, for a machine using opposed rotary cylinder abrading tools.

452, Butchering,

142,.

460, Crop Threshing or Separating, appropriate subclasses.