Abstract: An improved sheet feeding mechanism for an automatically driven typewriter. The feeder mechanism includes a housing which is mounted on the typewriter and defines a supply magazine for storing a stack of sheets to be typed and a finish magazine for storing typewritten sheets. When it is desired to feed a sheet through the platen of the typewriter, a platen clutch is disengaged to disconnect the platen from the typing mechanism and connect the platen to a feed roll. A pressure plate is actuated to force the pack of sheets in the supply magazine against the feed roll, and the feed roll will scrub the outermost sheet from the pack and move the sheet downwardly through a tapered chute and around the platen. After passing around the platen, the leading edge of the sheet actuates a sensing mechanism to release the pressure plate and engage the platen clutch to thereby begin the automatic typing on the sheet.

Abstract: An automatic sheet feeder for a tape driven typewriter includes a blank-sheet magazine and a filled-sheet magazine mounted above the platen. Sheet feed rollers are mounted to transfer the sheets to and from the platen and are coupled to a motor in combination with the typewriter platen. An electric clutch connects the platen to the normal line step drive. The clutch is disengaged simultaneously with energization of the motor so as to disengage the platen from the normal step drive during automatic feeding. A photoelectric encoder is coupled to the normal step drive and is activated to record the movement of the sheet through the typewriter. A presetable memory counter and a run counter detect a predetermined output of the encoder. The encoder is first connected to the memory counter. The first sheet is manually fed into the typewriter and the memory counter stores a record of the selected number of lines through which the sheet passes.