Cartridge for a typewriter correction ribbon

Claim 2

A cartridge (11) for use in a correcting ribbon (19) for a hammer typewriter of the type comprising a platen (16) which defines a typing point (17), support means for removably supporting the cartridge (11) and means pivoting the support means between a rest position in which the typing point (17) is visible and a working position in which the cartridge (11) has the correcting ribbon (19) in front of the typing point (17); wherein the cartridge (11) comprises: a container (12) having a cover lying in a plane (13), a feed-spool (22) and a take-up spool (24) for said correcting ribbon disposed side by side in the container (12); a lateral arm (14) for guiding the correcting ribbon (19) towards the typing point, wherein said lateral arm lies on a plane disposed above the horizontal plane of the cover (13) and extends at a side of said container towards the typing point (17) parallel to said cover (13); and a distance piece (25) which projects upwardly from the horizontal plane of of the cover at a corner of the container (12) and connects the container (12) with the lateral arm (14), and wherein said distance piece (25) comprises deviation surfaces (53, 54, 56 and 57) for guiding the correcting ribbon (19) among the feed-spool (22), the lateral arm (14) and the take-up spool (24).

Claim 3

A cartridge as claimed in claim 1, wherein the lateral arm comprises at its end a fork element, and the distance piece comprises a support adjacent the feed spool and two strips parallel therebetween, each having two inclined surfaces disposed opposite and parallel therebetween and wherein the deviation surfaces comprise said four inclined surfaces.

Claim 4

A cartridge as claimed in claim 2, wherein the correcting ribbon unwinds from the feed-spool and, guided by the support, engages a first inclined surface of one strip, said inclined surface turns the correcting ribbon through 90° vertically parallel to the platen, the correcting ribbon slides upwardly until a second inclined surface of one strip turns the correcting ribbon through 90° horizontally disposed along and guided by the lateral arm, engages the fork element which guides the correcting ribbon adjacent to the typing point and successively guides the correcting ribbon towards a third inclined surface of the second strip which turns the correcting ribbon through 90° vertically for sliding downwardly until a fourth inclined surface of the second strip turns the correcting ribbon through 90° horizontally for rewinding on to the take-up spool.

Claim 5

A cartridge as claimed in claim 1, wherein the lateral arm is flexible and approaches the platen in response to the striking of the correction ribbon.

Claim 6

A cartridge as claimed in claim 3, further comprising reaction element which opposes the lateral arm in order to prevent the bending of the arm away from the platen.

Claim 7

A cartridge as claimed in claim 5, further comprising a feed element which cooperates with the take-up spool for winding the ribbon which tends to bend the lateral arm in the direction opposed by the reaction element.

Claim 8

A cartridge as claimed in claim 1, wherein the container further comprises a base, and wherein the distance piece is in one piece with the lateral arm and is fixed between the base and the cover of the container.

Claim 9

A cartridge as claimed in claim 7, wherein the cover comprises a part which projects upwards from the horizontal plane of the cover and extends parallel to the lateral arm for protecting the distance piece.

Claim 10

A cartridge as claimed in claim 5, wherein the container comprises a cover including a protection part for the lateral arm and the reaction element is constituted by a shoulder on said protection part.

Claim 11

A cartridge as claimed in claim 1, wherein the deviation surfaces of said distance piece are constituted by inclined edges which impose a double 90° deviation on the correcting ribbon emerging and re-entering the container respectively.

Claim 12

A cartridge as claimed in claim 1, wherein the deviation surfaces between the feed spool and the lateral arm constitute a friction device for the ribbon emerging from the container.

Claim 13

A cartridge (11) for use in a correcting ribbon (19) for a hammer typewriter of the type comprising a platen (16) which defines a typing line and a typing point (17), support means for removably supporting the cartridge (11) and means pivoting the support means between a rest position in which the typing point (17) is visible and a working position in which the cartridge (11) has the correcting ribbon (19) in front of the typing point (17); wherein the cartridge (11) comprises; a substantially parallelepipedal container (12) having a cover (13), and including a feed-spool (22) and a take-up spool (24) for said correcting ribbon rotatably mounted in said container (12) and wherein said cover comprises an upper surface which lies on a substantially horizontal plane when the cartridge is supported by said support means in said rest position; a lateral arm (14) for guiding the correcting ribbon (19) towards the typing point, wherein said lateral arm lies on a horizontal plane disposed above the upper surface of said cover (13) and said typing line, wherein said lateral arm includes a terminal end which spans an external area of said correcting ribbon to lie above said typing point in the rest position of said support means and wherein the external area of said correcting ribbon is caused to be positioned in front of said typing point in the working position of said support means; and a distance piece (25) which projects upwards from the horizontal plane of said cover adjacent the platen and connects the container (12) with the lateral arm (14), wherein said distance piece (25) comprises first and second deviation surfaces (53, 54) for guiding the correcting ribbon (19) from said feed spool upwardly and laterally to said lateral arm and third and fourth deviation surfaces for guiding the correcting ribbon from the lateral arm downwardly and laterally to said take-up spool.

Claim 14

A cartridge (11) for use in a correcting ribbon (19) for a hammer typewriter of the type comprising a platen (16) which defines a typing line and a typing point (17), support means for removably supporting the cartridge (11) and means pivoting the support means between a rest position in which the typing point (17) is visible and a working position in which the cartridge (11) has the correcting ribbon (19) in front of the typing point (17); wherein the cartridge (11) comprises; a substantially parallelepipedal container (12) having a cover (13), and including a feed-spool (22) and a take-up spool (24) for said correcting ribbon rotatably mounted in said container (12) and wherein said cover comprises an upper surface which lies on a substantially horizontal plane when the cartridge is supported by said support means in said rest position; a lateral arm (14) for guiding the correcting ribbon (19) towards the typing point, wherein said lateral arm lies on a horizontal plane disposed above the upper surface of said cover (13) and said typing line, wherein said lateral arm includes a terminal end which spans an external area of said correcting ribbon to lie above said typing point in the rest position of said support means and wherein the external area of said correcting ribbon is caused to be positioned in front of said typing point in the working position of said support means; and a distance piece (25) which projects upwards from the horizontal plane of said cover adjacent the platen and connects the container (12) with the lateral arm (14), wherein said distance piece (25) comprises first and second deviation surfaces (53, 54) for guiding the correcting ribbon (19) from said feed spool upwardly and laterally to said lateral arm and third and fourth deviation surfaces for guiding the correcting ribbon from the lateral arm downwardly and laterally to said take-up spool.

Claim 15

A cartridge for a correcting ribbon for a hammer typewriter of the type comprising a platen which defines a typing point, a support for removably supporting the cartridge and means pivoting the support between a rest position in which the typing point is visible and a working position in which the cartridge has the correcting ribbon in front of the typing point, wherein the cartridge comprises a container for housing the correcting ribbon, a lateral arm having a fork element for guiding the correcting ribbon between the container and the typing point, wherein the fork element comprises a vertical shoulder, an edge inclined at 45° with respect and adjacent to the vertical shoulder, a pair of horizontal guides disposed upwards from the vertical shoulder and a horizontal shoulder disposed away from the vertical shoulder, wherein the pair of the horizontal guides are disposed between the vertical shoulder and the horizontal shoulder, wherein the correcting ribbon emerges from the container substantially vertically and engages the vertical shoulder which bends the correcting ribbon through 90° horizontally, perpendicular to the platen, in order to guide the correcting ribbon towards the inclined edge, the correcting ribbon undergoes at the inclined edge a double bending operation which rotates the correcting ribbon through 90° vertically to convey the correcting ribbon towards the first of the pair of the horizontal guides over which the correcting ribbon turns through 90° parallel to the platen and wherein the second horizontal guide of the pair guides the correcting ribbon downwards and towards the horizontal shoulder which conveys the correcting ribbon towards the container.

Claim 16

A cartridge for a correcting ribbon for a hammer typewriter of the type comprising a platen which defines a typing point, a support for removably supporting the cartridge and means pivoting the support between a rest position in which the typing point is visible and a working position in which the cartridge has the correcting ribbon in front of the typing point, wherein the cartridge comprises a container for housing the correcting ribbon, a lateral arm having a fork element for guiding the correcting ribbon between the container and the typing point, wherein the fork element comprises a vertical shoulder, an edge inclined at 45° with respect and adjacent to the vertical shoulder, a pair of horizontal guides disposed upwards from the vertical shoulder and a horizontal shoulder disposed away from the vertical shoulder, wherein the pair of the horizontal guides are disposed between the vertical shoulder and the horizontal shoulder, wherein the correcting ribbon emerges from the container substantially vertically and engages the vertical shoulder which bends the correcting ribbon through 90° horizontally, perpendicular to the platen, in order to guide the correcting ribbon towards the inclined edge, the correcting ribbon undergoes at the inclined edge a double bending operation which rotates the correcting ribbon through 90° vertically to convey the correcting ribbon towards the first of the pair of the horizontal guides over which the correcting ribbon turns through 90° parallel to the platen and wherein the second horizontal guide of the pair guides the correcting ribbon downwards and towards the horizontal shoulder which conveys the correcting ribbon towards the container.