US3833896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting a transport mishap of a copy paper in a reproducing apparatus
Assignee: Ricoh Co Ltd
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Filing: 1972-12-26
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Granted: 1974-09-03
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Expires: 1992-12-26
Abstract
Abstract In a reproducing apparatus, a delay timer operates an alarm after the lapse of a predetermined period during which a copy paper fails to pass a point in its travel path through the machine. This timer is placed in the operating condition by a signal which is generated when the transfer drum begins to rotate. When the copy paper has been transported normally within a particular time, the operation mode is released. However, when the copy paper is not discharged owing to the occurrence of a paper jam after a predetermined time has elapsed, the timer is caused to operate an alarm to indicate the occurrence of the paper jam. For apparatus wherein the reproduction cycle is shorter than the transportation time and a series of copies are to be made, three delay timers with a system of associated relays are presented to detect a paper jam at any point in the cycle.
Inventors
- 👤 M Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:49
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
242 words
In a reproducing apparatus wherein the time for one cycle of the reproducing process is shorter than the time of transportation between the start of feeding a copy paper and the discharge of the reproduced paper and the beginning time of the reproducing process has a predetermined time relation with the beginning time of transporting a copy paper, a device for detecting a transport mishap of a copy paper comprising a circuit including: a. a transport mishap indicator means; b. detector means for switching from a normal condition to an alternate condition during the passage of a copy paper thereby; c. relay means activated in response to the initiation of the reproducing process; and d. timer means activated to operate for a predetermined period of time in response to the activation of said relay means, for operating said indicator means if said detector means after the lapse of the predetermined period of time has not been switched to its alternate condition; e. said timer means comprising a first time delay timer and said relay means comprising: i. a first relay momentarily activated upon initiation of each reproduction process; ii. a second relay activated in response to the activation of said first relay; and iii. a third relay activated in response to the activation of said second relay, for operating said first time delay timer, said second and third relays being deactivated by the switching of said detector means to its alternate condition.
Claim 2
Dependent Claim
242 words
In a reproducing apparatus wherein the time for one cycle of the reproducing process is shorter than the time of transportation between the start of feeding a copy paper and the discharge of the reproduced paper and the beginning time of the reproducing process has a predetermined time relation with the beginning time of transporting a copy paper, a device for detecting a transport mishap of a copy paper comprising a circuit including: a. a transport mishap indicator means; b. detector means for switching from a normal condition to an alternate condition during the passage of a copy paper thereby; c. relay means activated in response to the initiation of the reproducing process; and d. timer means activated to operate for a predetermined period of time in response to the activation of said relay means, for operating said indicator means if said detector means after the lapse of the predetermined period of time has not been switched to its alternate condition; e. said timer means comprising a first time delay timer and said relay means comprising: i. a first relay momentarily activated upon initiation of each reproduction process; ii. a second relay activated in response to the activation of said first relay; and iii. a third relay activated in response to the activation of said second relay, for operating said first time delay timer, said second and third relays being deactivated by the switching of said detector means to its alternate condition.
Claim 3
Dependent Claim
61 words
A device as in claim 1 further comprising second timer means activated to operate for a second predetermined period of time in response to the switching of said detector means to its alternate coNdition, for operating said indicator means if said detector means after the lapse of the second predetermined period of time has not been switched to its normal condition.
Claim 4
Dependent Claim
43 words
A device as in claim 1 further comprising a second time delay timer and a fourth relay, activated in response to the activation of said first relay when said detector means is in its normal condition, for operating said second time delay timer.
Claim 5
Dependent Claim
86 words
A device as in claim 3, further comprising a fifth relay activated when said detector means is in its alternate condition; a sixth relay activated in response to the activation of said fifth relay; and a seventh relay activated in response to the deactivation of said fifth relay after the activation of said sixth relay, for subsequently maintaining the operation of said second relay and said third relay upon the return of said detector means to its alternate condition following the activation of said first relay.
Claim 6
Dependent Claim
31 words
A device as in claim 4, further comprising an eighth relay activated in response to the concurrent activation of said seventh relay and said fifth relay for deactivating said fourth relay.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |