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Browse Prior Art Database

Ribbon Plate Lift Amplifier

IP.com Disclosure Number: IPCOM000046863D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 53K

Publishing Venue

IBM

Related People

Kacmarcik, DJ: AUTHOR [+2]

Abstract

In daisy wheel printers or typewriters employing a ribbon cartridge, it is necessary to clear the ribbon cartridge and associated mechanism from the area of the printwheel to facilitate printwheel removal and replacement. Typically, the ribbon plate 10, illustrated in the drawing in solid lines, is elevated or must reciprocate during the printing operation to maximize ribbon usage and to present a fresh portion of the ribbon to the printwheel (not shown) for each character or indicia to be printed. This elevation or reciprocation is most easily accomplished by the use of a sector gear, such as the sector gear 11, which is driven by a drive gear 12 attached, for example, to a motor (not shown).

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Ribbon Plate Lift Amplifier

In daisy wheel printers or typewriters employing a ribbon cartridge, it is necessary to clear the ribbon cartridge and associated mechanism from the area of the printwheel to facilitate printwheel removal and replacement. Typically, the ribbon plate 10, illustrated in the drawing in solid lines, is elevated or must reciprocate during the printing operation to maximize ribbon usage and to present a fresh portion of the ribbon to the printwheel (not shown) for each character or indicia to be printed. This elevation or reciprocation is most easily accomplished by the use of a sector gear, such as the sector gear 11, which is driven by a drive gear 12 attached, for example, to a motor (not shown). When it is desired to elevate the ribbon plate 10 to the dotted line position to facilitate printwheel removal, in order to limit the throw of the sector gear which would require excessive clearance in the machine, means are provided for amplifying the sector gear 11 movement after a predetermined arcuate movement of the gear. To this end, the ribbon plate 10 includes a depending member 13 having a slot 14 extending rearwardly therein. The plate 10 is pivoted as at 15, and a sliding link 16, substantially L-shaped in configuration, is pivoted as at 17 on the sector gear 11. The opposite end of the link 16 includes a guide stud or the like 18 which is configured to ride in the slot 14 of the member 13. The opposite end of the link 16 rests on a lo...