Ing C. Olivetti C., S.p.a.

Olivetti Lexikon S.p.a.

Baltea S.p.a.

Sergio Uggetti

Remo Falconieri

Endless printing ribbon cartridge

Inked ribbon cartridge

Printing ribbon feeding device

This invention relates to a cartridge 11 for a printing ribbon 13 comprising a container 12 which houses an inked ribbon 12, a ribbon feeding roller 18 and a ribbon inking element 14. The inking element 14 is selectively actuated from a rest condition in which, during the cartridge utilization initial phase, the inking element does not supply the ribbon 13 with ink, to a work condition in which the inking element 14 supplies the ribbon with ink. A reducing unit 34 and a cam 33,42 are provided for automatically actuating the inking element 14 and guide it from the rest to the work condition, when a predetermined number of turns is reached by the feeding roller 18 for advancing the ribbon.

Inked ribbon cartridge with a ribbon inking element

A cassette for a printing ribbon comprises a casing accommodating a supply spool which has a tube on which the printing ribbon is wound. An anti-unrolling element of plastics material comprises two portions of elongate shape, which are connected by means of an integral elastic hinge. The first portion performs a guiding and positioning function and is accommodated by means of a slot within the casing. The second portion has a blocking function with regard to the tube, and is movable on the outside of the casing, by means of the elastic hinge, from an inoperative position in which it is aligned with the first portion to an operative position in which it is rotated through 180.degree. and is substantially in superposed relationship with the first portion. The second portion is provided with a hook element which, in its operative position, engages the tube through an opening in the casing for positively blocking the supply spool both during storage and during transportation of the cassette to inhibit unrolling in a simple and reliable manner.

Cassette for a printing ribbon for typewriters

A cartridge for a correction ribbon for typewriters comprises a container for a supply reel and a receiving reel. A tensioning device comprises a toothed ring on the supply rell and a spring which is pivoted in the container and which has one end engaged with the toothed ring to tension the ribbon. The container can be removably fixed to the lower part of a cartridge for a typing ribbon which in turn can be fitted on a support of the machine. The support is movable from a viewing position to a typing position in which the typing ribbon is in front of the point of typing and to a correction position in which the correction ribbon is in front of the point of typing. The receiving reel of the cartridge, in use, is capable of co-operating with a feed mechanism which provides for forward feed movement of the ribbon in each correction cycle. For that purpose the receiving reel comprises a series of frontal teeth provided in the lower part of its flange, the container comprises an opening and the feed mechanism comprises a ratchet co-operating with the frontal teeth through the opening for a forward feed cycle of the correction ribbon when the support moves between the viewing position and the correction position.

Cartridge including tension means for a typewriter correction ribbon

A cartridge for a typewriter typing ribbon comprises a container for accommodating the typing ribbon which can be of correctable or non-correctable type. A corrector cartridge can be removably fixed on the lower part of the container by engagement means. The corrector cartridge accommodates a correction ribbon which can be of the lift-off type suitable for the typing ribbon of correctable type, or of the cover-up correction type which is suitable for the typing ribbon of non-correctable type. Coupling means on the cartridge and the corrector cartridge permit the engagement means removably to fix the corrector cartridge to the container only when the caartridge houses the typing ribbon of correctable type and the corrector cartridge houses the correction ribbon of lift-off type or alternatively when the typing ribbon is of non-correctable type and the correction ribbon is of the cover-up type. In the event of a different choice, the coupling means prevent the engagement means from operating when the ribbons are not compatible with each other. Fixing means removably fix the container to a support of the typewriter either by itself or with the corrector cartridge attached and the fixing means do not cooperate and interfere with the engagement means and the coupling means.

Connectable cartridges for compatible typing and correction ribbons

A cartridge for a printing ribbon for a typewriter having a character-carrying disc comprises a casing and two oscillating arms between the ends of which a run of the ribbon extends in a straight line on the outside of the casing between the disc and the platen. The arms oscillate from a rest position in which they make the typing point visible, to three or more working positions in which they make it possible to print using one of three tracks of the ribbon. The two oscillating arms are pivoted by means of pins on seats of fixed supports of the casing. Pivotally mounted at the free end of each arm is a guide element, a stem of the guide element being received in a sleeve of the arm. Each guide element is thus capable of modifying its angular position with respect to the respective arm in response to the selection movement so that the ribbon is always held in tension in a uniform manner, irrespective of the track selected.

Cartridge for a printing ribbon

The sheet feeder can be mounted on a typewriter or on a printer in a system for processing data. The sheets which are accommodated in a feed magazine are passed to the platen roller by friction stripper rollers. After the printing operation, the sheets are passed on to a collection table positioned in front of the feed magazine. The stripper rollers are permanently connected to the platen roller by way of a mechanical transmission and rotate in the same direction as the platen roller. The stripper rollers are mounted on an oscillating arm to be selectively moved towards or away from the first sheet to be fed, by means of a first cam. Before a fresh sheet is fed, a second cam, also coupled to the platen roller, has to be brought to a reference position by rotating the platen roller enough to expel the current sheet. The platen roller is then rotated in the reverse direction, whereby the second cam actuates a lever, thereby to close a clutch. During subsequent rotation of the platen roller in the forward direction, the clutch rotates the first cam through one revolution for engaging the stripper rollers with the top sheet, thereby effecting stripping and feed of a sheet. At the end of the rotary movement through one revolution of the cam, the stripper rollers are moved away from the sheets and the clutch is opened, making the cams inoperative independently of subsequent rotary movements of the platen roller in one direction or the other.

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Ivrea, Italy

Sergio Uggetti