US3604796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-copy electrostatic machine control
Assignee: Minolta Co Ltd
•
Filing: 1969-01-10
•
Granted: 1971-09-14
•
Expires: 1989-01-10
Abstract
Abstract An electrostatic copier to feed sheet by sheet piled electrophotographic paper and transfer the image of the original sheet onto the paper, including a microswitch disposed at the entrance of an exposure station which is actuated and switches circuits for a charging device and a lamp when the electrophotographic paper charged on the switching on of a copying start switch enters the exposure station. A second microswitch disposed at the exit of the exposure station stops supplying electricity to the charging device, the lamp and two preset switches for copying a plurality of sheets when the tail end of the electrophotographic paper leaves an actuating member.
Inventors
- 👤 Masaya Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:43
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
135 words
An electrostatic copier with electric circuits comprising a feed motor to drive a paper feed roller by being actuated with a start switch; a relay to close a self-maintaining contact by being actuated with the start switch; a first preset switch having a plurality of contacts connected in parallel with the circuit of the start switch; a second preset switch having a plurality of contacts connected in parallel with the circuit of the relay; a presetting solenoid to switch the contacts of the preset switches every time a sheet of electrophotographic copy is made; a first pair of switches disposed in the circuits of the preset switches; a second pair of switches disposed in the circuits of a charging device and a lamp; and a relay to actuate the first and second pair of switches.
Claim 2
Dependent Claim
135 words
An electrostatic copier with electric circuits comprising a feed motor to drive a paper feed roller by being actuated with a start switch; a relay to close a self-maintaining contact by being actuated with the start switch; a first preset switch having a plurality of contacts connected in parallel with the circuit of the start switch; a second preset switch having a plurality of contacts connected in parallel with the circuit of the relay; a presetting solenoid to switch the contacts of the preset switches every time a sheet of electrophotographic copy is made; a first pair of switches disposed in the circuits of the preset switches; a second pair of switches disposed in the circuits of a charging device and a lamp; and a relay to actuate the first and second pair of switches.
Claim 3
Dependent Claim
79 words
An electrostatic copier as claimed in claim 1 in which the circuits of the start switch and the preset switches are connected with the circuit of a main switch through a first contact of a microswitch to open the first contact and close a second contact when the electrophotographic paper reaches an exposure station and to open the second contact and close the first contact when the electrophotographic paper leaves the actuating member of the first and second contacts.
Claim 4
Dependent Claim
55 words
An electrostatic copier as claimed in claim 2 in which a second microswitch is connected in parallel with the second contact of the first-mentioned microswitch to close a contact and supply electricity to the relay and close the first pair of switches when the tail end of the electrophotographic paper has passed the exposure station.
References Cited (Backward Citations)
US3330179A
Cited
US3416860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |