US3146100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic photocopying apparatus and method
Assignee: Bohn Business Machines Inc
•
Filing: 1960-01-26
•
Granted: 1964-08-25
•
Expires: 1980-01-26
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Kaufman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:35
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/06; G03G15/08; G03G15/09; G03G15/095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
THE METHOD OF REPRODUCING ON A DUPLICATING SHEET OF MATERIAL COATED WITH A PHOTOCONDUCTIVE INSULATING MEDIUM, A CONTRASTING PATTERN FORMED ON A MASTER SHEET BY AREAS HAVING DIFFERENT DEGREES OF LIGHT ABSORPTION, WHICH COMPRISES: PROGRESSIVELY FEEDING SAID DUPLICATING SHEET BETWEEN SPACED ELECTRODES HAVING A HIGH DIRECT CURRENT VOLTAGE IMPRESSED THEREBETWEEN FOR CHARGING ALL SO-COATED AREAS OF SAID DULPLICATING SHEET TO A SUBSTANTIALLY UNIFORM ELECTROSTATIC POTENTIAL, CONCURRENTLY THEREWITH PROGRESSIVELY FEEDING SAID MASTER SHEET PAST A SOURCE OF ILLUMINATION, WHILE FOCUSING A BEAM OF RAYS REFLECTED FROM SAID MASTER ONTO SAID DUPLICATING SHEET THEREBY TO DISCHARGE THE POTENTIAL FROM AREAS THEREOF IN ACCORDANCE WITH THE PATTERN ON SAID MASTER, FEEDING SAID DUPLICATING SHEET THENCE IN PROGRESSIVE CONTACT WITH A MAGNETICALLY SUSPENDED ROTATING SUBSTANTIALLY CYLINDRICAL MASS COMPOSED OF AN INTIMATE ADMIXTURE OF PARTICLES OF MAGNETIC MATERIAL AND PARTICLES OF A SUBSTANTIALLY OPAQUE THERMOSETTING SYNTHETIC RESIN IN A FINE STATE OF SUB-DIVISION, SAID MASS BEING SUSPENDED IN A MAGNETIC FIELD EXTENDING RADIALLY FROM THE SURFACE THEREOF AND DIRECTED SUBSTANTIALLY NORMAL TO THE PATH OF TRAVEL OF SAID DUPLICATING SHEET,
Claim 2
Independent Claim
175 words
THE METHOD OF REPRODUCING ON A DUPLICATING SHEET OF MATERIAL COATED WITH A PHOTOCONDUCTIVE INSULATING MEDIUM, A CONTRASTING PATTERN FORMED ON A MASTER SHEET BY AREAS HAVING DIFFERENT DEGREES OF LIGHT ABSORPTION, WHICH COMPRISES: PROGRESSIVELY FEEDING SAID DUPLICATING SHEET BETWEEN SPACED ELECTRODES HAVING A HIGH DIRECT CURRENT VOLTAGE IMPRESSED THEREBETWEEN FOR CHARGING ALL SO-COATED AREAS OF SAID DULPLICATING SHEET TO A SUBSTANTIALLY UNIFORM ELECTROSTATIC POTENTIAL, CONCURRENTLY THEREWITH PROGRESSIVELY FEEDING SAID MASTER SHEET PAST A SOURCE OF ILLUMINATION, WHILE FOCUSING A BEAM OF RAYS REFLECTED FROM SAID MASTER ONTO SAID DUPLICATING SHEET THEREBY TO DISCHARGE THE POTENTIAL FROM AREAS THEREOF IN ACCORDANCE WITH THE PATTERN ON SAID MASTER, FEEDING SAID DUPLICATING SHEET THENCE IN PROGRESSIVE CONTACT WITH A MAGNETICALLY SUSPENDED ROTATING SUBSTANTIALLY CYLINDRICAL MASS COMPOSED OF AN INTIMATE ADMIXTURE OF PARTICLES OF MAGNETIC MATERIAL AND PARTICLES OF A SUBSTANTIALLY OPAQUE THERMOSETTING SYNTHETIC RESIN IN A FINE STATE OF SUB-DIVISION, SAID MASS BEING SUSPENDED IN A MAGNETIC FIELD EXTENDING RADIALLY FROM THE SURFACE THEREOF AND DIRECTED SUBSTANTIALLY NORMAL TO THE PATH OF TRAVEL OF SAID DUPLICATING SHEET,
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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) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |