Single use ribbon cartridge with frangible resistive element for

Details Single use ribbon cartridge with frangible resistive element for Single use ribbon cartridge with frangible resistive element for

1980-12-08

1982-05-11

Pieprz, William

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

400234, 242199, B41J 3200

Patent

active

043290736

ABSTRACT:
In ribbon cartridges which are utilized in cooperation with a spacially fixed driving member engageable with a takeup spool at its periphery to feed the ribbon, it is necessary for the takeup spool to translate away from the spacially fixed driving member as the spool accumulates ribbon and the consumed ribbon forms disks of increasing diameter. A frangible portion of the cartridge may be utilized in conjunction with its transverse engagement with an extending axle coaxial with the takeup spool to resist the movement of the takeup spool into the chamber of the cartridge except as is forced by the increasing diameter of the ribbon disk formed on the takeup spool. The frangible section of the cartridge may be formed either during molding operation or as an additional member being added during assembly and will break or tear as the axle of the takeup spool is forced away from the end of the cartridge by the increasing diameter of the ribbon disk and the force of a driving member engaging the ribbon periphery. The frangible web section of the cartridge is sufficiently weakened to prevent structural damage to the ribbon mechanism while at the same time providing sufficient resistance to insure engagement of the exterior of the ribbon disk with the driver.

REFERENCES:
patent: 459379 (1891-09-01), Sander
patent: 769928 (1904-09-01), Ziegler
patent: 2717101 (1955-09-01), Van Handel
patent: 2804508 (1957-08-01), Mastling et al.
patent: 3011691 (1961-12-01), McGlynn et al.
patent: 3520495 (1970-07-01), Sotani
patent: 4010839 (1977-03-01), Guerrini et al.
patent: 4272201 (1981-06-01), Steger
Okcnogln, "Ribbon Cartridge", IBM Technical Disclosure Bulletin, vol. 22, No. 9, p. 4120, 2/80.

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