US PATENT SUBCLASS 400 / 188
FOR TYPING ON REVERSE SURFACE OF RECORD-MEDIUM


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



400 /   HD   TYPEWRITING MACHINES

188FOR TYPING ON REVERSE SURFACE OF RECORD-MEDIUM {2}
189  DF  .~> By simultaneous use of both surfaces of same ribbon
190  DF  .~> By use of "carbon paper"


DEFINITION

Classification: 400/188

FOR TYPING ON REVERSE SURFACE OF RECORD-MEDIUM:

(under the class definition) Subject matter wherein a record-medium* has a first surface which faces toward a platen*, and the record-medium has a second surface which faces toward a type-face* when the type-face is at a print-point*, and wherein significance is attributed to imprinting character* symbols on the first surface of the record-medium.

(1) Note. The characters are usually in mirror image, and the record-medium is either transparent so as to be able to read the characters through the record-medium, or the record-medium is a "hectograph" master. See Glossary, section III, for further discussion of hectograph under terms ribbon* and transfer-medium*.