Printer apparatus
AssigneeSheldon-Sodeco Printer, Inc.
InventorsJohn D. Pylant, Paul R. Lozeau, Newton R. Packard
Life of this patent
Estimating the term…
Abstract
High speed, on-the-fly line printer apparatus including an inked ribbon advancing mechanism, a print sheet advancing mechanism, and drive structure coupled with both the advancing mechanisms to interruptedly advance them. Also, the inked ribbon advancing mechanism may be bodily shiftable between different positions associated with different color printing modes, the drive structure accommodating such shifting. Furthermore, a drum having multiple columns of type font segments is provided.
Claims16
In compact printer apparatus operable to rapidly print characters on a print sheet in lines and columns,
- a. a frame,
- b. a continuously rotating rotary drum carried by the frame and having type font means thereon,
- c. hammer means carried by the frame for movement toward and away from the drum and the type font means thereon during rotation of the drum,
- d. an inked ribbon and carrier therefor carried by the frame to feed a local ribbon extent between the hammer means and rotating drum, there being ribbon advancing means engaging the ribbon and operable to effect endwise transport of the ribbon onto and off the carrier,
- e. print sheet advancing means carried by the frame to advance the sheet endwise between the drum and said local ribbon extent, and
- f. drive means operatively connected with the ribbon advancing means and with the sheet advancing means to interruptedly advance the sheet and the ribbon advancing means,
- g. said print sheet advancing means including a sheet advancing friction rotor peripherally and frictionally engageable with the sheet, the drive means including shoulders on the rotor, and pawl means engageable with the shoulders to interruptedly rotatably index the rotor, the frame supporting said friction rotor to rotate independently of but coaxially with said continuously rotating drum at one end thereof, the friction rotor periphery being annular and having a diameter approximately the same as the drum outer diameter.
Dependencies are inferred from the claim text.