Patent US3777871A successfully refreshed from Google Patents.
US3777871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon guide for typewriter ribbon cartridge
Assignee: SCM Corp
•
Filing: 1972-05-03
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Granted: 1973-12-11
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Expires: 1992-05-03
Abstract
Abstract A ribbon guide or carrier arm for a typewriter ribbon cartridge is disclosed. The carrier arm which is pivotally connectable to the cartridge housing to laterally extend therefrom, has a pair of channels formed therein for guiding a ribbon from the housing to a print point and back to the housing. An aperture is provided adjacent the end of the arm for exposing a portion of the ribbon to the print point. The end of the arm is V-shaped to effect a reversal in the direction of movement of the ribbon. A step having channel means therein for the ribbon is provided at the opening to the V-shaped section. A transparent plastic sheet is secured over the channels in the carrier arm guiding the ribbon and a hollow V-shaped cap is secured over the end of the carrier arm thus shielding most of the ribbon along the carrier arm outside the housing.
Inventors
- 👤 A Zeamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:55
CPC Classifications
B; B41; B41J; B41J35/00; B41J35/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
78 words
An improved cartridge for a typewriter ribbon, the cartridge having an arm with a V-shaped end to change the direction of the ribbon substantially 180 degrees, wherein the improvement comprises a flange around a portion of the mouth of the V of the V-shaped end of the arm to guide the ribbon on one face of the V and a channel for the ribbon on the other face of the V substantially perpendicular to and through the flange.
Claim 2
Dependent Claim
78 words
An improved cartridge for a typewriter ribbon, the cartridge having an arm with a V-shaped end to change the direction of the ribbon substantially 180 degrees, wherein the improvement comprises a flange around a portion of the mouth of the V of the V-shaped end of the arm to guide the ribbon on one face of the V and a channel for the ribbon on the other face of the V substantially perpendicular to and through the flange.
Claim 3
Dependent Claim
55 words
The cartridge of claim 1 which includes a hollow V-shaped cap mounted on the flange on the V-shaped end of the arm, the cap providing clearance for movement of the ribbon to, around, and away from the end of the arm while confining the ribbon on the end of the arm and shielding the ribbon.
Claim 4
Dependent Claim
60 words
The cartridge of claim 2 which includes a projection on the point of the V of the V-shaped end of the arm and an aperture for the projection in the point of the V of the V-shaped cap to align the cap on the end of the arm and prevent the ribbon from riding over the end of the arm.
Claim 5
Dependent Claim
21 words
The cartridge of claim 1 which includes a partition in the channel to form two substantially parallel channels for the ribbon.
Claim 6
Dependent Claim
55 words
The cartridge of claim 4 which includes a hollow V-shaped cap mounted on the flange on the V-shaped end of the arm, the cap providing clearance for movement of the ribbon to, around, and away from the end of the arm while confining the ribbon on the end of the arm and shielding the ribbon.
Claim 7
Dependent Claim
60 words
The cartridge of claim 5 which includes a projection on the point of the V of the V-shaped end of the arm and an aperture for the projection in the point of the V of the V-shaped cap to align the cap on the end of the arm and prevent the ribbon from riding over the end of the arm.
Claim 8
Dependent Claim
104 words
The cartridge of claim 1 which includes a second channel for the ribbon in an intermediate portion of the arm on the opposite side of the arm from the channel in the V-shaped end but in alignment with the channel in the V-shaped end, a hook-like finger in the second channel dividing the second channel into two substantially parallel channels for the ribbon, and a shield having an aperture for mating with the hook-like finger to connect the shield to the arm over the second channel while allowing clearance for movement of the ribbon in the two substantially parallel channels of the second channel.
Claim 9
Dependent Claim
33 words
The cartridge of claim 7 which includes an abutment on the arm for the end of the shield on the open-end side of the hook-like finger to lock the shield on the arm.
Claim 10
Dependent Claim
35 words
The cartridge of claim 8 which includes a partition in the second channel to divide the second channel into said two substantially parallel channels for the ribbon and the hook-like finger is on the partition.
Claim 11
Dependent Claim
21 words
The cartridge of claim 9 in which the shield is composed of a transparent material to permit viewing of the ribbon.
Claim 12
Dependent Claim
106 words
An improved cartridge for a typewriter ribbon, the cartridge having an arm, wherein the improvement comprises a channel for the ribbon in an intermediate portion of the arm, a hook-like finger in the channel dividing the channel into two substantially parallel channels for the ribbon, a shield having an aperture for mating with the hook-like finger to connect the shield to the arm over the channel while allowing clearance for movement of the ribbon in the substantially parallel channels, and an abutment on the arm for the end of the shield on the open-end side of the hook-like finger to lock the shield on the arm.
Claim 13
Dependent Claim
106 words
An improved cartridge for a typewriter ribbon, the cartridge having an arm, wherein the improvement comprises a channel for the ribbon in an intermediate portion of the arm, a hook-like finger in the channel dividing the channel into two substantially parallel channels for the ribbon, a shield having an aperture for mating with the hook-like finger to connect the shield to the arm over the channel while allowing clearance for movement of the ribbon in the substantially parallel channels, and an abutment on the arm for the end of the shield on the open-end side of the hook-like finger to lock the shield on the arm.
Claim 14
Dependent Claim
33 words
The cartridge of claim 11 which includes a partition in the channel to divide the channel into said two substantially parallel channels for the ribbon and the hook-like finger is on the partition.
Claim 15
Dependent Claim
21 words
The cartridge of claim 12 in which the shield is composed of a transparent material to permit viewing of the ribbon.
References Cited (Backward Citations)
US623502A
Cited
US809378A
Cited
US2464042A
Cited
US2883029A
Cited
US2869705A
Cited
US3590221A
Cited
US3643777A
Cited
US3643778A
Cited
US3643779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |