Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material

BPERFORMING OPERATIONS TRANSPORTING B41Printing, stamps B41JTYPEWRITERS SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS

B41J33/00Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material

B41J33/003Ribbon spools B41J33/006Arrangements to attach the ribbon to the spool B41J33/02Ribbon arrangements B41J33/04mounted on moving carriages B41J33/06Ribbons associated, but not moving, with typewriter platens B41J33/08and extending parallel to the length of the platen B41J33/10Arrangements of endless ribbons B41J33/12Ribbons carried by coaxially-mounted spools B41J33/14Ribbon-feed devices or mechanisms B41J33/16with drive applied to spool or spool spindle B41J33/18by ratchet mechanism B41J33/20by friction B41J33/22by gears or pulleys B41J33/24with drive applied directly to ribbon B41J33/26by rollers engaging the ribbon B41J33/28by mechanism pulling or gripping the ribbon B41J33/30Escapement mechanisms B41J33/32Electromagnetic devices B41J33/34driven by motors indepently of the machine as a whole B41J33/36with means for adjusting feeding rate B41J33/38Slow B41J33/382the ribbon being fed only during carriage return B41J33/384and attached to the carriage during writing B41J33/386the ribbon being fed only by operation of the line spacing mechanism B41J33/388the ribbon being fed only when type impression takes place B41J33/40with arrangements for reversing the feed direction B41J33/42manually B41J33/44automatically B41J33/46and characterised by its application to mechanism in which two spools are driven by pawl-and-rachet mechanism B41J33/48comprising two pawls and ratchets, one for each spool B41J33/50comprising a single pawl or integral double-tooth pawl selectively engageable with two ratchets, one for each spool B41J33/51and characterised by the use of particular reversing control means B41J33/512using a pivoted reversing-feeler engaging the external periphery of the wound ribbon B41J33/514using a pivoted reversing-feeler engaging the interior of the wound ribbon B41J33/516using a reversing-feeler responsive to the tension of the ribbon B41J33/518the reversing-feeler engaging buttons or the like secured to the ribbon near its end B41J33/52Braking devices therefor B41J33/54for ensuring maximum life of the ribbon B41J33/56Ribbon adjusted transversely B41J33/58Ribbon fed angularly B41J33/60responsive to telegraph code or other extraneous signals