US PATENT SUBCLASS 400 / 204
.~ For typing plural copies simultaneously with ribbon(s) (e.g., duplicate typing)

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

191  DF  INCLUDING INTERPOSED INKING DEVICE (E.G., RIBBON) FOR RECORD-MEDIUM {15}
204.~ For typing plural copies simultaneously with ribbon(s) (e.g., duplicate typing) {2}
205  DF  .~.~> Including holder for short length of ribbon {1}
206  DF  .~.~> Using plural ribbons (e.g., additional ribbon(s) {4}

DEFINITION

Classification: 400/204

For typing plural copies simultaneously with ribbon(s) (e.g.,

duplicate typing):

(under subclass 191) Subject matter wherein the transfer-medium* is a ribbon* and wherein plural portions of the same ribbon, or plural ribbons, are positionable relative to plural record-medium* pieces so that a single impact of a type-face* against the record-medium* imprints an identical character* on each of said pieces at the same time.

(1) Note. Proper placement of a patent into this or an indented subclass requires recitation of a transfer-medium in ribbon form. Usually the typewriter of these subclasses is used to type "duplicate original copy" texts of typed material. The term "original copy" refers to typed text that is imprinted with the use of a ribbon coated with ink* to form characters that are not

easily erased from the record-medium. The ribbon used may be an inked fabric ribbon, although in some typewriters a different form of ribbon, called a "carbon ribbon" or a "carbon-ink ribbon" has come into use. An " original copy" is distinguished from a "carbon copy" in at least two respects: an original copy is on a record-medium that is located adjacent to a fabric ribbon or a carbon ribbon at the print-point*, so that a type-face will impact directly or through the ribbon to cause transplacing of ink directly onto the surface of the record-medium, and the character imprinted onto the original may be erased only with difficulty; a carbon copy is on a record medium that under lies an original copy and a sheet of transfer-medium, usually consisting of "carbon paper", and the character imprinted onto a carbon copy is erased easily.

(2) Note. In placing a patent as an original into this or one of the subclasses indented hereunder, consideration must be taken of the intent of the patent as determined by various criteria. The primary criterion is the intent to produce a plurality of original copy texts. This is determined by a positive disclosure of at least one of the following criteria: (a) at least two record-medium pieces are imprinted each via a ribbon with "permanent" (i.e., not easily erasable) ink, (b) the ribbon(s) being used are reversible (i.e., fed in two opposite directions so that the ribbon is used and reused). If the specification is not clear as to plural original copy texts, the patent may be cross-referenced herein, but placed as an original patent into subclass 497 as appropriate. The use of carbon paper in typing carbon copies is found in this class, subclass 497.

SEE OR SEARCH THIS CLASS, SUBCLASS:

497, and see (2) Note above.