US3584733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transport system for single sheets of photosensitive material
Assignee: Meteor Siegen Apparatebau Paul Schmeck GmbH
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Filing: 1968-09-16
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Granted: 1971-06-15
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Expires: 1988-09-16
Abstract
Abstract A conveyor belt transporting apparatus for photosensitive sheet material, which belt attracts the sheets electrostatically, the electrostatic charge being applied to the belt from a DC voltage source by an electrode which extends transversely of the belt, a load resistor being connected between the electrode and the DC voltage source for automatically adjusting the potential at the electrode to the value required by air humidity.
Inventors
- 👤 Heinrich Isermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:07
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6529; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/585; G03G15/02; G03G15/0266
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
198 words
A system for transporting single sheets of photosensitive material in a given plane, more particularly xerographic or photographic copy material into and out of the exposure position in the focal plane of a copy machine, said system comprising; an electrostatically chargeable endless conveyor belt which is tensioned between drive and reversal rollers, an outer surface of said conveyor belt being movable in said given plane; a voltage source for producing a continuous direct current voltage without polarity reversal; an electrode electrically connected to said voltage source, extending transversely of the direction of movement of said belt and positioned in the region of said given plane for producing an electrostatic voltage sufficient to electrostatically charge said belt for attracting said sheets to said belt; means providing ground potential on the opposite side of said belt in opposition to said electrode, and a fixed resistor electrically connected intermediate said electrode and said voltage source for varying the current through said electrode in accordance with the relative humidity at said electrode whereupon said electrostatic voltage is varied in accordance with said relative humidity and said electrostatic charge on said belt is continuously maintained at a sufficient level for attracting said sheets.
Claim 2
Independent Claim
198 words
A system for transporting single sheets of photosensitive material in a given plane, more particularly xerographic or photographic copy material into and out of the exposure position in the focal plane of a copy machine, said system comprising; an electrostatically chargeable endless conveyor belt which is tensioned between drive and reversal rollers, an outer surface of said conveyor belt being movable in said given plane; a voltage source for producing a continuous direct current voltage without polarity reversal; an electrode electrically connected to said voltage source, extending transversely of the direction of movement of said belt and positioned in the region of said given plane for producing an electrostatic voltage sufficient to electrostatically charge said belt for attracting said sheets to said belt; means providing ground potential on the opposite side of said belt in opposition to said electrode, and a fixed resistor electrically connected intermediate said electrode and said voltage source for varying the current through said electrode in accordance with the relative humidity at said electrode whereupon said electrostatic voltage is varied in accordance with said relative humidity and said electrostatic charge on said belt is continuously maintained at a sufficient level for attracting said sheets.
Claim 3
Dependent Claim
35 words
A system according to claim 1, characterized in that the ground potential means comprises a roller having a grounded electrode connected thereto is provided adjacent said conveyor belt on a side opposite to the electrode.
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) | 1974-06-14 | 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 |