US3597594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet counting apparatus
Assignee: De la Rue Instruments Ltd
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Filing: 1968-10-02
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Granted: 1971-08-03
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Expires: 1988-10-02
Abstract
Abstract The invention relates to apparatus for counting a stack of sheets of paper of the kind including a rotary member or grip provided with suction ports for gripping said sheets one at a time and arranged to deflect said sheets one by one on rotation of said member, and means comprising a pressure-sensitive device for counting suction pulses created by the application of suction to said sheets, the pressure-sensitive device comprises a pressure-deformable element adapted on receipt of a pulse to influence directly an electrical circuit which includes a digital counter for the pulses, preferably by closing a pair of electrical contacts in said circuit whereby the digital counter is advanced.
Inventors
- 👤 Peter Steward Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:20
CPC Classifications
G; G06; G06M; G06M9/00; G06M9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
195 words
Apparatus for counting a stack of sheets of paper and like flexible materials comprising a rotary member provided with a plurality of suction organs for gripping sheets one at a time and arranged to deflect sheets one by one on rotation of said member; a stationary air distributor having a suction port in communication with a source of suction, and a single separate counting port in fluid communication with a single pressuresensitive bellows; a conduit formed in the said rotary member for each of the said suction organs, said conduits each terminating respectively at a suction organ and a port capable of being sequentially alignable with both the suction port and the counting port of the said stationary air distributor upon rotation of the said rotary member to first establish a suction within the respective conduit and hold such suction when a sheet is engaged by a respective one of said suction organs and then relieving such suction through said counting port to actuate said pressure-sensitive bellows; and an electrical counting circuit comprising a source of electricity, an electromagnetic digital counter unit and a switch adapted to be actuated by movement of said pressure-sensitive bellows.
Claim 2
Dependent Claim
195 words
Apparatus for counting a stack of sheets of paper and like flexible materials comprising a rotary member provided with a plurality of suction organs for gripping sheets one at a time and arranged to deflect sheets one by one on rotation of said member; a stationary air distributor having a suction port in communication with a source of suction, and a single separate counting port in fluid communication with a single pressuresensitive bellows; a conduit formed in the said rotary member for each of the said suction organs, said conduits each terminating respectively at a suction organ and a port capable of being sequentially alignable with both the suction port and the counting port of the said stationary air distributor upon rotation of the said rotary member to first establish a suction within the respective conduit and hold such suction when a sheet is engaged by a respective one of said suction organs and then relieving such suction through said counting port to actuate said pressure-sensitive bellows; and an electrical counting circuit comprising a source of electricity, an electromagnetic digital counter unit and a switch adapted to be actuated by movement of said pressure-sensitive bellows.
References Cited (Backward Citations)
US2912242A
Cited
US3158706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |