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Browse Prior Art Database

Erase Ribbon Lift and Advancing Mechanism

IP.com Disclosure Number: IPCOM000087015D
Original Publication Date: 1976-Dec-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Mathews, RD: AUTHOR

Abstract

An erase ribbon lift and advancing mechanism is structured for mounting below a print element in order to improve operator writing line visibility.

This text was extracted from a PDF file.
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Erase Ribbon Lift and Advancing Mechanism

An erase ribbon lift and advancing mechanism is structured for mounting below a print element in order to improve operator writing line visibility.

In Fig. 1, a cartridge 1, operator insertable, carries erase ribbon 7 wound on spool 8. Following insertion, ribbon 7 is threaded around guides 2, 3 and 4 and attached to spool 5 in take-up cartridge 6. With ribbon 1 attached to spool 5, portion 9 is in a position to be brought up into alignment with the print line along platen 10. The above identified elements are housed in housing 11.

Referring to Fig. 2, housing 11 is pivotally connected to up-stop member 12 about pivot point 13. When it is desired to erase a printed character, erase solenoid 14 is activated. Upon activation of solenoid 14, housing 11 is rotated until top 25 of cartridge 6 contacts stop 26, and crank 15 is rotated in a counterclockwise direction about pivot 16. Rotation of crank 15 causes pawl 17 to be displaced to the left for engagement with teeth 18 on outboard ratchet 19, connected to spool 5. This will result in rotation of spool 5 in the clockwise direction for winding ribbon 7 on spool 5.

The extent of rotation of spool 5 upon displacement of pawl 17 to the left is controlled by follower 20, which is in contact with ribbon 7 as it is wound on spool
5. As the wrap of ribbon 7 on spool 5 increases, the extent of rotation of spool 5 by pawl 17 must be reduced, if ribbon is to be conserved. That is, ribb...