Patent US3584723A successfully refreshed from Google Patents.
US3584723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink-ribbon feeding and reversing assembly
Assignee: SCM-P&S Inc
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Filing: 1968-09-25
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Granted: 1971-06-15
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Expires: 1988-09-25
Abstract
Abstract There is disclosed an ink-ribbon feeding and reversing assembly with a pair of ratchet wheels and a respective pair of drive pawls. The rachet wheels drive respective ribbon carriers. The ribbon is driven in one direction when one of the pawls is in driving engagement with one rachet wheel, the other pawl being held out of driving engagement with the other ratchet wheel. An electric motor continuously drives a drive shaft through a clutch. The drive shaft carries a pair of eccentrics which are directly connected to the pair of pawls. An eyelet at each end of the ribbon actuates an associated sensing lever. When either one of the sensing levers is actuated it operates a respective interposer. Each pawl drives an actuator. When either interposer is moved into the path of its respective actuator, a reversing control device is operated to switch the direction of ribbon feed. The reversing control device includes a tubular control shaft received by the drive shaft. Control members, interconnected by the control shaft, enable engagement of one drive pawl and one detent pawl with one ratchet wheel and hold the other drive pawl and another detent pawl out of engagement with the other ratchet wheel.
Inventors
- 👤 Hilding A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:50
CPC Classifications
B; B41; B41J; B41J33/00; B41J33/14; B41J33/40; B41J33/44; B41J33/51; B41J33/518
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
285 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl for driving said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, and a second drive pawl for driving said second ratchet wheel; a reversing control device for effecting reversal of the direction of feed of the ribbon, said reversing control device including means for alternately switching one of said drive pawls into driving engagement with its respective ratchet wheel and the other of said drive pawls out of driving engagement with its respective ratchet wheel, a first actuator movable in a path, a first interposer movable from an inactive position to an active position into the path of said first actuator, a second actuator movable in a path, a second interposer movable from an inactive position to an active position into the path of said second actuator, means operative when the ribbon has been substantially fully wound onto one of said ribbon carriers for moving said first interposer into the path of said first actuator, and means operative when the ribbon has been substantially fully wound onto the other of said ribbon carriers for moving said second interposer into the path of said second actuator, said first actuator being operable to drive said first interposer when said first interposer is in its active position to switch said switching means, said second actuator being operable to drive said second interposer when said second interposer is in its active position to switch said switching means, and driving means for continuously driving said first and second drive pawls and said first and second actuators.
Claim 2
Dependent Claim
285 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl for driving said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, and a second drive pawl for driving said second ratchet wheel; a reversing control device for effecting reversal of the direction of feed of the ribbon, said reversing control device including means for alternately switching one of said drive pawls into driving engagement with its respective ratchet wheel and the other of said drive pawls out of driving engagement with its respective ratchet wheel, a first actuator movable in a path, a first interposer movable from an inactive position to an active position into the path of said first actuator, a second actuator movable in a path, a second interposer movable from an inactive position to an active position into the path of said second actuator, means operative when the ribbon has been substantially fully wound onto one of said ribbon carriers for moving said first interposer into the path of said first actuator, and means operative when the ribbon has been substantially fully wound onto the other of said ribbon carriers for moving said second interposer into the path of said second actuator, said first actuator being operable to drive said first interposer when said first interposer is in its active position to switch said switching means, said second actuator being operable to drive said second interposer when said second interposer is in its active position to switch said switching means, and driving means for continuously driving said first and second drive pawls and said first and second actuators.
Claim 3
Dependent Claim
65 words
The invention as defined in claim 1, wherein said driving means includes a continuously rotatable shaft, an eccentric connection between each of said first and second drive pawls and said continuously rotatable shaft, said eccentric connections imparting orbital movement to each of said first and second drive pawls, said first and second drive pawls being in driving engagement with their respective first and second actuators.
Claim 4
Dependent Claim
39 words
The invention as defined in claim 1, wherein said driving means includes a continuously rotatable shaft and cam means driven by said continuously rotatable shaft for driving said first and second drive pawls and said first and second actuators.
Claim 5
Dependent Claim
39 words
The invention as defined in claim 1, wherein said switching means includes a pivotal tubular control shaft, and said driving means including a drive shaft received by said tubular control shaft, and means for continuously driving said drive shaft.
Claim 6
Dependent Claim
138 words
The invention as defined in claim 1, including a first drive spindle connecting said first ratchet wheel and said first ribbon carrier, a second drive spindle connecting said second ratchet wheel and said second ribbon carrier, a first sensing lever pivotally mounted by said first drive spindle, an eyelet secured to one marginal end of the ribbon being engageable with said first sensing lever to cause said first sensing lever to drive said first interposer to its active position in the path of said first actuator, and a second sensing lever pivotally mounted by said second drive spindle, an eyelet secured to the other marginal end of the ribbon being engageable with said second sensing lever to cause said second sensing lever to drive said second interposer to its active position in the path of said second actuator.
Claim 7
Dependent Claim
136 words
The invention as defined in claim 1, wherein said switching means includes a pivot shaft, a detent for holding said pivot shaft in either one of two pivoted positions, first and second detent pawls engageable respectively with said first and second ratchet wheels, said first actuator being operable together with said first interposer to pivot said pivot shaft to effect disengagement of said first drive and detent pawls from said first ratchet wheel and to effect engagement of said second drive and detent pawls wiTh said second ratchet wheel, and said second actuator being operable together with said second interposer to pivot said pivot shaft to effect disengagement of said second drive and detent pawls from said second ratchet wheel and to effect engagement of said first drive and detent pawls with said first ratchet wheel.
Claim 8
Dependent Claim
84 words
The invention as defined in claim 1, including a first sensing lever operated by an eyelet secured to one marginal end of the ribbon for moving said first interposer to its active position, a yieldable connection between said first sensing lever and said first interposer, a second sensing lever operated by another eyelet secured to the other marginal end of the ribbon for moving said second interposer to its active position, and a yieldable connection between said second sensing lever and said second interposer.
Claim 9
Dependent Claim
36 words
The invention as defined in claim 1, said driving means including a clutch for limiting the amount of torque which can be applied to said first and second drive pawls and said first and second actuators.
Claim 10
Dependent Claim
126 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl engageable with said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, a second drive pawl engageable with said second ratchet wheel, a drive shaft, cam means drivingly connecting said drive shaft directly to said first and second drive pawls, switching means for alternately and selectively enabling one of said drive pawls to be in driving engagement with its respective ratchet wheel, said switching means including interposer means controlled by said ribbon, and actuator means driven directly by said cam means for driving said interposer means which in turn switches said switching means.
Claim 11
Dependent Claim
126 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl engageable with said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, a second drive pawl engageable with said second ratchet wheel, a drive shaft, cam means drivingly connecting said drive shaft directly to said first and second drive pawls, switching means for alternately and selectively enabling one of said drive pawls to be in driving engagement with its respective ratchet wheel, said switching means including interposer means controlled by said ribbon, and actuator means driven directly by said cam means for driving said interposer means which in turn switches said switching means.
Claim 12
Dependent Claim
65 words
The invention defined in claim 9, said actuator means having a path of movement, means for reciprocably mounting said interposer means between an inactive position out of the path of movement of said actuator means and an active position in the path of movement of said actuator means, and means for holding said switching means in its switched position until switched by said interposer means.
Claim 13
Dependent Claim
56 words
The invention as defined in claim 9, wherein said cam means includes an eccentric connection between each of said first and second drive pawls and said drive shaft, said eccentric connections imparting orbital movement to each of said first and second drive pawls, said interposer means including an interposer driven directly by its respective actuator means.
Claim 14
Dependent Claim
24 words
The invention as defined in claim 9, including clutch means for limiting the amount of torque which can be applied to said drive shaft.
Claim 15
Dependent Claim
178 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl engageable with said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, a second drive pawl engageable with said second ratchet wheel, means for driving said first and second drive pawls including means for driving at least one of said drive pawls in an orbital path, a reversing control device for effecting reversal of the direction of feed of the ribbon, said reversing control device including switchable control means engageable with said first and second drive pawls, an interposer for switching said switchable control means, and an actuator driven by said one drive pawl which moves in said orbital path, and means operable by the ribbon when the ribbon is substantially fully wound on one of said ribbon carriers for moving said interposer to an active position in the path of said actuator to effect driving of said interposer to operate said switchable control means.
Claim 16
Dependent Claim
178 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl engageable with said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, a second drive pawl engageable with said second ratchet wheel, means for driving said first and second drive pawls including means for driving at least one of said drive pawls in an orbital path, a reversing control device for effecting reversal of the direction of feed of the ribbon, said reversing control device including switchable control means engageable with said first and second drive pawls, an interposer for switching said switchable control means, and an actuator driven by said one drive pawl which moves in said orbital path, and means operable by the ribbon when the ribbon is substantially fully wound on one of said ribbon carriers for moving said interposer to an active position in the path of said actuator to effect driving of said interposer to operate said switchable control means.
Claim 17
Dependent Claim
44 words
The invention as defined in claim 13, wherein said switchable control means includes a tubular control shaft movable between first and second positions, and said meAns for driving said first and second drive pawls including a drive shaft received by said tubular control shaft.
Claim 18
Dependent Claim
137 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl having a drive end for driving said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, a second drive pawl having a drive end for driving said second ratchet wheel, a drive shaft, first and second eccentric connections connecting said drive shaft directly respectively to said first and second drive pawls, and first and second guide means engaging respectively said first and second drive pawls, whereby said drive ends of said first and second drive pawls make orbital movements; and means, including said first and second guide means, for controlling the reversal of direction of ribbon feed between said first and second ribbon carriers.
Claim 19
Dependent Claim
137 words
For an ink-ribbon feeding and reversing assembly: a first ribbon carrier, a first ratchet wheel for driving said first ribbon carrier, a first drive pawl having a drive end for driving said first ratchet wheel, a second ribbon carrier, a second ratchet wheel for driving said second ribbon carrier, a second drive pawl having a drive end for driving said second ratchet wheel, a drive shaft, first and second eccentric connections connecting said drive shaft directly respectively to said first and second drive pawls, and first and second guide means engaging respectively said first and second drive pawls, whereby said drive ends of said first and second drive pawls make orbital movements; and means, including said first and second guide means, for controlling the reversal of direction of ribbon feed between said first and second ribbon carriers.
Claim 20
Dependent Claim
15 words
The invention as defined in claim 15, including means for continuously driving said drive shaft.
Claim 21
Dependent Claim
33 words
The invention as defined in claim 15, further comprising means for driving said drive shaft including a motor and a clutch for limiting the torque which can be applied to said drive shaft.
Claim 22
Dependent Claim
188 words
An ink-ribbon feeding and reversing assembly comprising: a first ratchet wheel, a first ribbon carrier connected to and driven by said first ratchet wheel, a second ratchet wheel, a second ribbon carrier connected to and driven by said second ratchet wheel, a rotatable drive shaft, a tubular control shaft partially encompassing said drive shaft and having first and second control positions, a first drive pawl engaging and driving said first ratchet wheel whenever said control shaft is in said first position, a second drive pawl engaging and driving said second ratchet wheel whenever said control shaft is in said second position, a first actuator means driven by said drive shaft and operable to place said control shaft in said first position, a second actuator means driven by said drive shaft and operable to place said control shaft in said second position, first switching means controlled by said ribbon to render said first actuator means effective to place said control shaft in said first position, and second switching means controlled by said ribbon to render said second actuator means effective to place said control shaft in said second position.
Claim 23
Dependent Claim
188 words
An ink-ribbon feeding and reversing assembly comprising: a first ratchet wheel, a first ribbon carrier connected to and driven by said first ratchet wheel, a second ratchet wheel, a second ribbon carrier connected to and driven by said second ratchet wheel, a rotatable drive shaft, a tubular control shaft partially encompassing said drive shaft and having first and second control positions, a first drive pawl engaging and driving said first ratchet wheel whenever said control shaft is in said first position, a second drive pawl engaging and driving said second ratchet wheel whenever said control shaft is in said second position, a first actuator means driven by said drive shaft and operable to place said control shaft in said first position, a second actuator means driven by said drive shaft and operable to place said control shaft in said second position, first switching means controlled by said ribbon to render said first actuator means effective to place said control shaft in said first position, and second switching means controlled by said ribbon to render said second actuator means effective to place said control shaft in said second position.
Claim 24
Dependent Claim
80 words
The invention as defined in claim 18 wherein said first switching means includes a first interposer means having a first active and inactive position, said first actuator means driving said first interposer means whenever said first interposer means is in said active position, and said second switching means includes a second interposer means having a second active and inactive position, said second actuator means driving said second interposer means whenever said second interposer means is in said second active position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |