US PATENT SUBCLASS 400 / 138.2
.~.~.~ On rotatable carrier (e.g., for scarifying elements, etc.)

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

135  DF  TYPING TO PRODUCE PIERCED CHARACTER {2}
137  DF  .~ Check-protection character {1}
138  DF  .~.~ By type-die mounted on carrier movable for selection of character {2}
138.2.~.~.~ On rotatable carrier (e.g., for scarifying elements, etc.) {3}
138.3  DF  .~.~.~.~> Actuated by key-board control
138.4  DF  .~.~.~.~> Including plural-character type-die {1}
138.6  DF  .~.~.~.~> For type-die including piercing or cutting elements

DEFINITION

Classification: 400/138.2

On rotatable carrier (e.g., for scarifying elements, etc.):

(under subclass 138) Subject matter wherein the support for the type-die elements is a member that turns about an axis to select the type-die to be impressed against the record-medium*.

(1) Note. In the typewriter of this subclass the type-die elements usually pierce one surface of the record-medium to roughen that surface beyond a level where the surface may be made smooth again. The intent is not necessarily for the type-die to perforate both surfaces of the record-medium, but rather to scarify at least one surface.