US PATENT SUBCLASS 400 / 497
WITH CONTROL OF "CARBON PAPER" FOR TYPING PLURAL SIMULTANEOUS COPIES BY SINGLE IMPRESSION (E.G., ON "MANIFOLD SET")

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

497WITH CONTROL OF "CARBON PAPER" FOR TYPING PLURAL SIMULTANEOUS COPIES BY SINGLE IMPRESSION (E.G., ON "MANIFOLD SET") {10}
498  DF  .~> Including prevention of full imprint on "carbon copy" record-medium
499  DF  .~> On record-medium wound around platen together with carbon paper
500  DF  .~> With means for causing slack in web of manifold set {2}
503  DF  .~> By use of other than rectangular sheet carbon paper (e.g., disc, etc.) {1}
505  DF  .~> By multicolor carbon paper
506  DF  .~> With means to prevent creep (e.g., relative movement) between record-media
507  DF  .~> Including means for creep feed of carbon paper
508  DF  .~> Including spool or support for roll of carbon paper {4}
513  DF  .~> Including relative movement between carbon paper and record-medium {5}
520  DF  .~> Carbon paper holder (e.g., loading board, etc.)

DEFINITION

Classification: 400/497

WITH CONTROL OF "CARBON PAPER" FOR TYPING PLURAL SIMULTANEOUS COPIES BY SINGLE IMPRESSION (E.G., ON "MANIFOLD SET"):

(under the class definition) Subject matter wherein one typewriter, using one set of key* elements and one type-set-assemblage*, types one "original copy" and at least one "carbon copy", the carbon copy being produced by use of "carbon paper" adjacent to the carbon copy, and wherein significance is attributed to the use of, movement of, or position of, carbon paper in the typing of the carbon copy.

(1) Note. The term carbon paper is a typewriter industry term for a transfer-medium* coated on one of its surfaces with a substance containing carbon or other pigment, this form of transfer-medium having the property that a character* symbol imprinted therewith is easily erased. In contrast to an ink* that impregnates the fibers of a record-medium* or adheres tightly to the surface thereof, a carbon paper includes a pigment that lightly coats the surface of a record-medium and can be easily removed from said surface. In the early technology of carbon paper manufacture, it was made using carbon as the pigment of the coating, therefore its name, despite recent development which has produced carbon paper having other colors and pigments and made without carbon. In use, a sheet or web or ribbon* of carbon

paper is placed with its coated surface adjacent to a surface of a record-medium (which is to be the carbon copy) and its uncoated surface adjacent to the undersurface of the record-medium which is to be the "original copy". The impact of a single type-face* will effect the imprint of a corresponding character on both copies. To produce additional carbon copies, a corresponding number of pieces of carbon paper and record-medium are used underlying the first of the carbon copies.

(2) Note. A manifold set is an assemblage that includes at least one piece of carbon paper with its coated surface adjacent to a surface of one piece of a record-medium that is to be the carbon copy. To produce an original copy a piece of record-medium must be placed over the assemblage, and to produce additional carbon copies, other assemblages may be placed under the first-mentioned assemblage.

(3) Note. Use of carbon paper to produce one or more carbon copies is found in this and the indented subclasses. However, other subclasses found higher in the schedule reflect the use of carbon paper for other purposes. One of these subclasses is subclass 190 wherein carbon paper is used to type on the reverse surface of a record-medium. Another of these subclasses is subclass 206.1 wherein carbon paper in the form of a narrow elongated ribbon is used. Also in subclass 227 a narrow carbon ribbon which is usually a carbon-ink film, but may be a carbon-paper ribbon, is fed by a ribbon-feed mechanism.

(4) Note. The typewriter of this subclass includes a structure for changing the feed direction of a sheet or web of carbon paper.

SEE OR SEARCH THIS CLASS, SUBCLASS:

37+, for a flat-platen* typewriter for typing on a manifold set. 190, 206.1 and 227+, and see (3) Note above.

204+, for typing of plural original copies simultaneously.