US4537850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for rejuvenating electrostatic copy machine toner
Assignee: ZAPPER ELECTRONICS WILFRED SMEIMAN SCRIBNER ENTERPRISES Inc A CA PARTNERSHIP CONSISTING OF NORMAN DOLGIN AND NORMAN HENTHORN
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Filing: 1983-08-30
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Granted: 1985-08-27
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Expires: 2003-08-30
Abstract
Abstract A method and apparatus for rejuvenating magnetic toner used in certain electrostatic copying machines. The used toner is placed in a container which is inserted in an air coil which is energized to produce a magnetic field which remagnetizes the toner. The coil is provided by mounting a hollow non-magnetic tube in a case and winding this tube with wire. A timing circuit energized by a momentary switch determines the length of time a magnetic field is applied to the toner being recycled.
Inventors
- 👤 Wilfred Smeiman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:40
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A process for rejuvenating toner for electrostatic copy machines comprising: transferring a used toner having magnetic particles coated with a fusible component to a container; surrounding said container with an electromagnetic coil; energizing said electromagnetic coil to apply a pulsed magnetic field to said toner; timing the output of said electromagnetic coil to optimize the application of said pulsed electromagnetic field for optimum magnetic strength of said toner.
Claim 2
Dependent Claim
68 words
A process for rejuvenating toner for electrostatic copy machines comprising: transferring a used toner having magnetic particles coated with a fusible component to a container; surrounding said container with an electromagnetic coil; energizing said electromagnetic coil to apply a pulsed magnetic field to said toner; timing the output of said electromagnetic coil to optimize the application of said pulsed electromagnetic field for optimum magnetic strength of said toner.
Claim 3
Dependent Claim
15 words
The process according to claim 1 in which said electrocoil is energized by rectifying means.
Claim 4
Dependent Claim
25 words
The process according to claim 2 in which said rectifying means is a half-wave rectifier producing half-wave rectified pulses of a predetermined magnitude and frequency.
Claim 5
Dependent Claim
24 words
The process according to claim 1 in which said timing means produces an output from said energizing means for between two to ten minutes.
Claim 6
Dependent Claim
16 words
The process according to claim 4 in which said timer produces an output for five minutes.
Claim 7
Dependent Claim
32 words
The process according to claim 1 including sensing the temperature proximate said toner; shutting off said energizing means before the temperature approaches the melting point of said fusion component in said toner.
Claim 8
Dependent Claim
85 words
Apparatus for rejuvenating toner for electrostatic copy machines comprising: a hollow core means; an electromagnetic coil surrounding said hollow core means; container means containing used toner having magnetic particles coated with a fusible component for placing the toner to be rejuvenated inside said core; energizing means for energizing said electromagnetic coil to produce a pulsed electromagnetic field to said toner; timing means for timing the operation of said energizing means to optimize the application of said electromagnetic field for optimum magnetic strength of said toner.
Claim 9
Dependent Claim
85 words
Apparatus for rejuvenating toner for electrostatic copy machines comprising: a hollow core means; an electromagnetic coil surrounding said hollow core means; container means containing used toner having magnetic particles coated with a fusible component for placing the toner to be rejuvenated inside said core; energizing means for energizing said electromagnetic coil to produce a pulsed electromagnetic field to said toner; timing means for timing the operation of said energizing means to optimize the application of said electromagnetic field for optimum magnetic strength of said toner.
Claim 10
Dependent Claim
28 words
Apparatus according to claim 7 in which said timer means comprises; a timer; means for activating said timer; and means for setting the time period of said timer.
Claim 11
Dependent Claim
35 words
Apparatus according to claim 7 including temperature sensing means; said temperature sensing means adapted to shut off said energizing means before the temperature reaches the melting point temperature of said fusion component of said toner.
Claim 12
Dependent Claim
30 words
Apparatus according to claim 7 in which said timer is an integrated circuit chip; and said activating means comprises a momentary pushbutton switch connected to reset said integrated circuit chip.
Claim 13
Dependent Claim
40 words
Apparatus according to claim 8 in which said means for setting said timer comprises an RC circuit connected to said intergrated circuit whereby the selected time is determined by the value of the resistor and capacitor in said RC circuit.
Claim 14
Dependent Claim
23 words
Apparatus according to claim 11 in which the resistor in said RC circuit is a potentiometer whereby the selected time may be adjusted.
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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |