Patent US3603680A successfully refreshed from Google Patents.
US3603680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrasonic paper detection
Assignee: Xerox Corp
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Filing: 1969-12-24
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Granted: 1971-09-07
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Expires: 1989-12-24
Abstract
Abstract Paper jam detection system for use in a printing machine of the type having sheet feed and transporting means including a plurality of ultrasonic detection devices arranged along the paper path of movement to be influenced by each moving sheet, and circuit means for monitoring in timed sequence the effect upon each of the detection devices as sheets are transported.
Inventors
- 👤 Edward D Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:00
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/70; B; B41; B41L; B41L39/00; B41L39/04; B41L39/14; B65; B65H; B65H7/00; B65H7/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
In a sheet-paper-transporting system having means for conveying sheets of paper along a predetermined transport path in timed sequence, the combination of a plurality of sheet-detecting devices spaced along the transport path at predetermined locations, eacH of said devices comprising an ultrasonic generating element adapted to produce ultrasonic waves, and a microphone element spaced from the generating element at a distance to permit the free movement of sheets to be detected therebetween, said microphone element being arranged to be influenced by the ultrasonic waves generated from said generating element and adapted to effect a signal when a sheet is present between said elements, said devices being connected in a circuit having timing means adapted to receive the signal from each of said devices in timed sequence during movement of each sheet being transported by the sheet conveying means, and to effect a corrective signal in the event a signal from one of the devices is not received thereby.
Claim 2
Dependent Claim
158 words
In a sheet-paper-transporting system having means for conveying sheets of paper along a predetermined transport path in timed sequence, the combination of a plurality of sheet-detecting devices spaced along the transport path at predetermined locations, eacH of said devices comprising an ultrasonic generating element adapted to produce ultrasonic waves, and a microphone element spaced from the generating element at a distance to permit the free movement of sheets to be detected therebetween, said microphone element being arranged to be influenced by the ultrasonic waves generated from said generating element and adapted to effect a signal when a sheet is present between said elements, said devices being connected in a circuit having timing means adapted to receive the signal from each of said devices in timed sequence during movement of each sheet being transported by the sheet conveying means, and to effect a corrective signal in the event a signal from one of the devices is not received thereby.
Claim 3
Dependent Claim
181 words
A sheet-paper-handling system including transporting means for conveying sheets of paper along a predetermined transport path in timed sequence, said transporting means having a plate structure upon which each sheet is moved during conveying thereof, a plurality of sheet detecting devices spaced along the transport path at predetermined locations, each of said devices comprising an ultrasonic generating element adapted to produce ultrasonic waves and mounted on said plate structure, each of said devices also including a microphone element spaced from the generating element at a distance to permit the free movement of sheets therebetween, said microphone element being arranged to be influenced by the ultrasonic waves generated from said generating element and adapted to effect a signal when a sheet is present in said plate structure and between said elements, said devices being connected in a circuit adapted to receive the signal from each of said devices in times sequence during movement of each sheet being conveyed on said plate structure and to effect a corrective signal in the event a signal from one of the devices is not received thereby.
Claim 4
Dependent Claim
181 words
A sheet-paper-handling system including transporting means for conveying sheets of paper along a predetermined transport path in timed sequence, said transporting means having a plate structure upon which each sheet is moved during conveying thereof, a plurality of sheet detecting devices spaced along the transport path at predetermined locations, each of said devices comprising an ultrasonic generating element adapted to produce ultrasonic waves and mounted on said plate structure, each of said devices also including a microphone element spaced from the generating element at a distance to permit the free movement of sheets therebetween, said microphone element being arranged to be influenced by the ultrasonic waves generated from said generating element and adapted to effect a signal when a sheet is present in said plate structure and between said elements, said devices being connected in a circuit adapted to receive the signal from each of said devices in times sequence during movement of each sheet being conveyed on said plate structure and to effect a corrective signal in the event a signal from one of the devices is not received thereby.
Claim 5
Dependent Claim
187 words
In a printing machine having a photosensitive printing member, means for feeding and transporting sheets of paper along a predetermined path and an operating circuit for effecting the on-off printing operation of the machine, the combination of a plurality of sheet-detecting devices spaced along the path at predetermined locations, each of said devices comprising an ultrasonic generating element adapted to produce ultrasonic waves and a microphone element spaced from the generating element at a distance to permit the free movement of sheets to be detected therebetween, said microphone element being arranged to be influenced by the ultrasonic waves generated from said generating element and adapted to effect a signal when a sheet is present between said elements, said devices being connected in a circuit having timing means adapted to receive the signal from each of said devices in timed sequence during movement of each sheet being transported by the sheet feed and transporting means, and to effect a corrective signal to the operating circuit of the machine for terminating the printing operation thereof in the event a signal from one of the devices is not received thereby.
Claim 6
Dependent Claim
187 words
In a printing machine having a photosensitive printing member, means for feeding and transporting sheets of paper along a predetermined path and an operating circuit for effecting the on-off printing operation of the machine, the combination of a plurality of sheet-detecting devices spaced along the path at predetermined locations, each of said devices comprising an ultrasonic generating element adapted to produce ultrasonic waves and a microphone element spaced from the generating element at a distance to permit the free movement of sheets to be detected therebetween, said microphone element being arranged to be influenced by the ultrasonic waves generated from said generating element and adapted to effect a signal when a sheet is present between said elements, said devices being connected in a circuit having timing means adapted to receive the signal from each of said devices in timed sequence during movement of each sheet being transported by the sheet feed and transporting means, and to effect a corrective signal to the operating circuit of the machine for terminating the printing operation thereof in the event a signal from one of the devices is not received thereby.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |