US PATENT SUBCLASS 400 / 581
.~.~ To find last-produced slit or hole or notch in sheet

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

578  DF  SHEET OR WEB (E.G., RECORD-MEDIUM FEEDING MECHANISM) {13}
580  DF  .~ Including forming indicia on record-medium during typing to find next line to be typed {1}
581.~.~ To find last-produced slit or hole or notch in sheet

DEFINITION

Classification: 400/581

To find last-produced slit or hole or notch in sheet:

(under subclass 580) Subject matter wherein the record-medium* is in sheet form and said mark on the sheet is formed thereon by (a) piercing the sheet without removing material therefrom, or by (b) perforating the sheet through both opposite surfaces thereof, or by (c) cutting out a portion of the edge of the sheet, and wherein any of the marks described is made concurrently with the typing of the print-line* that is to be used as a reference location of a new print-line that the typist wishes to type.