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Class 400/220 - Alternative pawl-and-ratchet drive including ratchet directly connected to spool or spindle


Subclass of Class 400 - Typewriting machines
Definition: Subject matter wherein opposite ends of the ribbons* are
No. of patents: 2
Last issue date: 03/05/1985


NumberTitleIssue Date
4502803Reversible ink ribbon feed mechanism
The ink ribbon feed mechanism comprises a pair of spool shafts adapted for carrying ribbon spools, a pair of feed pawls selectively engaged with one of the ratchet wheels on said spool shafts for imparting intermittent rotation to the spool shafts, and a ... 		03/05/1985
3976185Typewriter ribbon conveying mechanism
A ribbon cassette support is pivotally mounted on the printing head carriage of a typewriter. The support includes driving pawls for driving the cassette hubs and a member selectively disengaging one pawl from one hub to allow driving of the other hub by ... 		08/24/1976
 
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