EP0038215A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Actuation device for two typewriter functions
Assignee: Olivetti SpA
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Filing: 1981-04-14
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Granted: —
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Expires: 2001-04-14
Abstract
Abstract A cartridge 47 for a typing ribbon 48 and spools for a correcting ribbon 52 are mounted on a common frame which can tilt about a spindle 46. In a lowered position of the frame the typing line behind a daisy wheel 28 is visible. The frame is raised by a first stroke to the position shown to dispose the typing ribbon 48 over the typing point on the platen 11. A longer stroke raises the correcting ribbon 52 to the typing point and this longer stroke also actuates an automatic ratchet wheel and pawl type of feed mechanism for the correcting ribbon. The two strokes of the frame are controlled by a disc comprising two cam tracks with a common part 83 and separate parts 84 and 86 having different degrees of eccentricity relative to the common part. The grooved cam tracks are so shaped that a follower pin 87 on an arm 88 depending from the frame enters the radially inner track 84 when the disc 71 is rotated clockwise by a reversible electric motor, thereby to raise the frame by the smaller amount, whereas it enters the radially outer track 86 in the case of anticlockwise rotation. The disc 71 also carries a frontal cam which operates a ribbon feed mechanism fort the ribbon in the container 47.
Inventors
- 👤 Franco Valle
- 👤 Pietro Musso
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
B; B41; B41J; B41J35/00; B41J35/04; B41J35/10; B41J35/22; B41J35/23
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
38 words
An actuation device for two typewriter functions, characterised by a single control member (71) which executes cyclic movements to select the functions and selects one or the other function depending on the sense of the cycle of movement.
Claim 2
Dependent Claim
38 words
An actuation device for two typewriter functions, characterised by a single control member (71) which executes cyclic movements to select the functions and selects one or the other function depending on the sense of the cycle of movement.
Claim 3
Dependent Claim
31 words
A device according to claim 1, characterised in that the control member (71) actuates a selecting member (88) through two different strokes depending on the sense of the cycle of movement.
Claim 4
Dependent Claim
73 words
A device as claimed in claim 2, characterised in that the control member (71) is rotatable about an axis and comprises common cam track (83) and two separate cam tracks (84, 86) which are eccentric with respect to the common cam track and so connected thereto as to be respectively followed by a cam follower (87) on the selecting member (88) for the two senses of rotation respectively of the control member (71).
Claim 5
Dependent Claim
38 words
A device as claimed in claim 3, characterised in that the common cam track (83) is so connected to the two eccentric tracks (84, 86) as to form two grooved cam tracks which share the common cam track.
Claim 6
Dependent Claim
36 words
A device as claimed in claim 4, characterised in that the cam follower (87) is always controlled positively by the two grooved cam tracks (83, 84, 86) in order to prevent oscillation of the selecting member.
Claim 7
Dependent Claim
33 words
A device as claimed in claim 3, 4 or 5, characterised by an electric motor (79) arranged to rotate the control member (71) selectively in a clockwise direction and in an anticlockwise direction.
Claim 8
Independent Claim
65 words
A device as claimed in any of claims 3 to 6, characterised in that the selecting member (88) is coupled to a frame (41) for supporting a typing ribbon (47, 48) and an erasing ribbon (49, 51, 52) and in that the typing and correcting ribbons are positioned in front of the typing point by the two different strokes respectively of the selecting member (88).
Claim 9
Dependent Claim
79 words
Typing and/or correcting device for typewriters, comprising a support frame for a typing ribbon and for an erasing ribbon disposed at a different height from the typing ribbon and in which the frame can swivel to give visibility and to allow typing of the characters, characterised by a control member (71) which effects different cyclic movements in positioning the two ribbons (48, 52) respectively over the typing point, and which also effects the feed movement of the typing ribbon.
Claim 10
Dependent Claim
79 words
Typing and/or correcting device for typewriters, comprising a support frame for a typing ribbon and for an erasing ribbon disposed at a different height from the typing ribbon and in which the frame can swivel to give visibility and to allow typing of the characters, characterised by a control member (71) which effects different cyclic movements in positioning the two ribbons (48, 52) respectively over the typing point, and which also effects the feed movement of the typing ribbon.
Claim 11
Dependent Claim
33 words
A device as claimed in claim 8, characterised in that the control member comprises a frontal cam (101) arranged to control a mechanism (72) for the automatic feed of the typing ribbon (48).
Claim 12
Dependent Claim
82 words
A device as claimed in claim 9, in which the typing ribbon is disposed in a cartridge which swivels about an axle between a rest position and a working position, characterised in that the mechanism (72) for feeding the typing ribbon (48) comprises a pawl (112) operated by the frontal cam (101) and arranged to engage a toothed wheel (117) in order to control a feed element (122) for the typing ribbon in the zone adjacent to the cartridge swivel axle (46).
Claim 13
Dependent Claim
54 words
Device as claimed in any of claims 8 to 10, characterised in that the control member (71) maintains the typing ribbon (48) in front of the typing point during repeated typing of the characters, but executes such movements that the frontal cam (101) actuates the mechanism for the automatic feed of the typing ribbon.
Claim 14
Independent Claim
23 words
A device as claimed in any of claims 8 to 11, characterised in that the device is fitted in a daisy wheel typewriter.
Claim 15
Independent Claim
42 words
A device as claimed in any of the preceding claims, characterised in that a central unit (132) controls an input and utput unit (131) arranged to control clockwise and anticlockwise rotations of an electric motor (79) connected to the control member (71).
Claim 16
Dependent Claim
53 words
A device as claimed in claim 13, insofar as dependent on claim 3, characterised in that the control member (71) comprises a position indicator (141-154) arranged to feed the position signals of the two grooved cam tracks (83, 84, 86) and of said frontal cam (101) to the input and output unit (131).
Claim 17
Dependent Claim
33 words
A device as claimed in claim 14, characterised in that the position signals are generated by brushes (141, 142, 143, 152) sliding over corresponding tracks (144, 146, 147, 152) of said position indicator.
Claim 18
Dependent Claim
137 words
A typewriter comprising a mechanism for selecting a typing ribbon and a correcting ribbon, characterised in that the mechanism comprises a cyclically rotatable control member (71) coupled to a reversible electric motor (79) and bearing two cam tracks (84, 86) which share a common part (83) and which copperate with a cam followed (87) arranged to actuate a ribbon selector member (88, 41) with two different strokes, depending upon which cam track is followed by the cam follower, thereby to select the typing ribbon (48) for one strobe and the correcting ribbon (52) for the other strobe, the cam tracks being so formed that one cam track is followed when the motor rotates the control member in one sense and the other cam track is followed when the motor rotates the control member in the opposite sense.
Claim 19
Dependent Claim
137 words
A typewriter comprising a mechanism for selecting a typing ribbon and a correcting ribbon, characterised in that the mechanism comprises a cyclically rotatable control member (71) coupled to a reversible electric motor (79) and bearing two cam tracks (84, 86) which share a common part (83) and which copperate with a cam followed (87) arranged to actuate a ribbon selector member (88, 41) with two different strokes, depending upon which cam track is followed by the cam follower, thereby to select the typing ribbon (48) for one strobe and the correcting ribbon (52) for the other strobe, the cam tracks being so formed that one cam track is followed when the motor rotates the control member in one sense and the other cam track is followed when the motor rotates the control member in the opposite sense.
References Cited (Backward Citations)
No citation records indexed.
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