US PATENT SUBCLASS 400 / 23
FOR TYPING ON FLAT RECORD-MEDIUM OR AGAINST FLAT PLATEN

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

23FOR TYPING ON FLAT RECORD-MEDIUM OR AGAINST FLAT PLATEN {14}
24  DF  .~> For typing on a book {4}
29  DF  .~> For typing on flat blueprint or drawing (e.g., "platenless" typewriter)
30  DF  .~> For typing on carton or package
31  DF  .~> By multidirectional movement of typewriter structure (e.g., "Elliot-Fisher" structure)
32  DF  .~> Bottom-strike typewriter including type-bar action or bar platen or anvil platen
33  DF  .~> Top-strike typewriter including pivoted type-bar
34  DF  .~> Including carriage-return mechanism
35  DF  .~> Including case-shift by shifting platen
36  DF  .~> Including ribbon-feed mechanism
37  DF  .~> For typing on manifold set (e.g., with type-die, etc.) {5}
43  DF  .~> Including feed of tally strip
44  DF  .~> Including line-spacing mechanism {3}
48  DF  .~> Work support (e.g, sheet or card holddown or guide, sheet-size platen, etc.)
49  DF  .~> Collating-table attachment

DEFINITION

Classification: 400/23

FOR TYPING ON FLAT RECORD-MEDIUM OR AGAINST FLAT PLATEN:

(under the class definition) Subject matter wherein the significance is attributed to a typewriter in which the record-medium* that is being typed on is planar or in which the record-medium is backed by a platen* that is planar.

(1) Note. In the definition of the term platen in the Glossary, section III, there is a discussion of some of the various forms of platen. Included therein is a discussion of the difference between a flat or planar platen and a cylindrical platen. This and indented subclasses are the loci of disclosures wherein a typewriter is provided with a significant flat or planar platen.

SEE OR SEARCH THIS CLASS, SUBCLASS:

648, for a cylindrical platen in a typewriter.