Typewriting machines – Including interposed inking device for record-medium – Endless ribbon or cartridge therefor
Patent
1994-12-16
1997-04-15
Burr, Edgar S.
Typewriting machines
Including interposed inking device for record-medium
Endless ribbon or cartridge therefor
2423432, 2423452, B41J 3200
Patent
active
056202652
ABSTRACT:
An ink ribbon cartridge includes a detachable ink ribbon spool which may be rotatably mounted in a lower shell of the cartridge via first and second shank portions axially projected from opposite sides of the spool. The first shank is of a rod shaped configuration, and includes at least large and small circumference sections which are longitudinally spaced apart. According to such configuration, the spool may be installed only in a compatible ink ribbon cartridge having a lower shell including a first bearing member formed with a first bearing groove rotatably supporting the large circumference section of the first shank and having a width proportional thereto. A second bearing member is disposed adjacent to, and spaced apart from, the first bearing member. The second bearing member includes a second bearing groove having a width proportional to the small circumference section of the first shank. A third bearing member is formed at a location in said lower shell opposing the first bearing member such that the second shank of the spool is rotatably supported thereby. According to this, various configurations of spools and compatible lower shells may be realized which may be utilized for distinguishing between various types of ink ribbon, etc. Since a spool may only be mounted in a lower shell of compatible configuration, misassembly during manufacturing is prevented. In addition, user error, such as accidental installation of an inappropriate ink ribbon, may be surely prevented.
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Burr Edgar S.
Colilla Daniel J.
Kananen Ronald P.
Sony Corporation
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