US3602356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ribbon reversing mechanism
Assignee: Monroe Systems for Business Inc
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Filing: 1968-01-15
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Granted: 1971-08-31
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Expires: 1988-01-15
Abstract
Abstract A ribbon reversing mechanism operable by ribbon tension for alternatively winding a ribbon around one spool and then the other spool in a typical two spool ribbon winding mechanism such as employed on typewriters, calculators, etc. The reversing means for operating one spool or the other comprises a shiftable drive member which is shifted by two cam operated clutches, each of which also transmits the drive to one of the spools. The clutches are so arranged that as one starts to become disengaged, the other simultaneously starts to become engaged. Thus there is no intermediate position when neither spool is engaged to the drive.
Inventors
- 👤 James W Dodswrth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:20
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/14; B41J33/40; B41J33/44; B41J33/51; B41J33/516; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
268 words
A mechanism for winding a ribbon comprising: a reeling means having a first reeling member, and 9 second reeling member, drive means mounted to operate said reeling means, control means including a shifting member connected to said drive means, a first clutch means having a first clutch member connected to said shifting member, and a second clutch member in axial alignment with said first clutch member coacting with said reeling means and mounted on and in axial alignment with said shifting member so that the shifting member can rotate and shift relative to said second clutch member, a second clutch means having a first clutch member connected to said shifting member, and a second clutch member in axial alignment with said first clutch member coacting with said reeling means, in the same manner and at the same time as said second clutch member of said first clutch means, said second clutch member mounted on and in axial alignment with said shifting member so that the shifting member can rotate and shift relative to said second clutch member, said control means being responsive to a tension condition of the ribbon to cause said first and second clutch members of said first clutch means which arE in a first position wherein they are engaged to disengage and cause said shifting member to move between the first position wherein said drive means is positioned to operate said first reeling member and to second position in which said first and second clutch members of said second clutch means are engaged and said drive means is positioned to operate said second reeling member.
Claim 2
Dependent Claim
268 words
A mechanism for winding a ribbon comprising: a reeling means having a first reeling member, and 9 second reeling member, drive means mounted to operate said reeling means, control means including a shifting member connected to said drive means, a first clutch means having a first clutch member connected to said shifting member, and a second clutch member in axial alignment with said first clutch member coacting with said reeling means and mounted on and in axial alignment with said shifting member so that the shifting member can rotate and shift relative to said second clutch member, a second clutch means having a first clutch member connected to said shifting member, and a second clutch member in axial alignment with said first clutch member coacting with said reeling means, in the same manner and at the same time as said second clutch member of said first clutch means, said second clutch member mounted on and in axial alignment with said shifting member so that the shifting member can rotate and shift relative to said second clutch member, said control means being responsive to a tension condition of the ribbon to cause said first and second clutch members of said first clutch means which arE in a first position wherein they are engaged to disengage and cause said shifting member to move between the first position wherein said drive means is positioned to operate said first reeling member and to second position in which said first and second clutch members of said second clutch means are engaged and said drive means is positioned to operate said second reeling member.
Claim 3
Dependent Claim
39 words
The mechanism of claim 1, wherein said first and second reeling members includes gear teeth and wherein said second clutch members include gear teeth which are always enmeshed with the gear teeth of said first and second reeling members.
Claim 4
Dependent Claim
49 words
The mechanism of claim 2 wherein said first and second clutch members include saw teeth which are mounted so that when they are enmeshed in the operatively related position the clutch is engaged and when they are out of mesh in an inoperatively related position the clutch is disengaged.
Claim 5
Dependent Claim
44 words
The mechanism of claim 3 wherein the saw teeth form cam surfaces which cam apart to disengage one clutch means when the ribbon is in tension, and to cause the shifting member means to move and cause the engagement of the other clutch means.
Claim 6
Dependent Claim
22 words
The mechanism claim 4 wherein means is provided to temporarily secure said shifting member in either said first or said second position.
Claim 7
Dependent Claim
30 words
The mechanism of claim 5 wherein said second clutch members are cylindrical having said saw teeth at one end thereof and having said gear teeth at the other end thereof.
Claim 8
Dependent Claim
32 words
The mechanism of claim 6 wherein biasing means is provided between said first and second clutch members of said first and second clutch means for aiding in the operation of said clutch.
Claim 9
Dependent Claim
42 words
The mechanism of claim 7 wherein a link is provided to transmit the drive means to said shifting member to rotate said shifting member and thereby rotate the engaged clutch member and the reeling member which is engaged with that clutch member.
Claim 10
Dependent Claim
23 words
The mechanism of claim 8 wherein spring clutch means are provided to provide for rotation of the shifting member in only one direction.
Claim 11
Dependent Claim
47 words
The mechanism of claim 9 wherein the gear teeth of said second clutch members are beveled gear teeth and wherein the gear teeth on said reeling member are also beveled teeth so that the axis of the clutch is perpendicular to the axis of the reeling member.
Claim 12
Dependent Claim
19 words
In the mechanism of claim 10 wherein said ribbon is a printing ribbon for use in a printing mechanism.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |