US3580673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus
Assignee: Xerox Corp
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Filing: 1968-08-26
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Granted: 1971-05-25
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Expires: 1988-08-26
Abstract
Abstract A method and apparatus for cleaning the residual toner image from an electrostatic recording surface for reuse in the imaging system. This is accomplished by contacting the electrostatic recording surface to be cleaned with an electrically insulating magnetic cleaning material which is moved on a transport into sweeping contact with the residual image. An electrical potential is applied to the transport of opposite polarity to the residual image and of a magnitude sufficient to pull the residual image onto the magnetic cleaning material which wipes the residual image enabling mechanical as well as electrostatic forces to remove the residual image. The residual image is removed from the magnetic cleaning material by contacting it with an electrically biased member which is connected to a voltage potential of sufficient magnitude to remove the image from the cleaning material onto the surface of electrical biasing member ensuring continuous removal of the residual image for subsequent reuse in the imaging system.
Inventors
- 👤 Frank Y Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:19
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0047; G03G21/10; G03G2221/00; G03G2221/0005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
152 words
Cleaning apparatus for removing electrostatically adhering toner particles from an electrostatic recording surface for reuse in an electrostatic copying system comprising transport means for transporting cleaning beads in sweeping contact with an electrostatic recording surface from which electrostatically adhering toner particles are to be removed, said transport means being connected to an electrical biasing potential of a polarity opposite that of the toner particles and of a magnitude sufficient to remove the particles from the recording surface and onto the cleaning beads, roll positioned in the path of said transport means coupled to an electrical biasing potential of a polarity opposite that of said toner particles and of a magnitude sufficient to attract said toner particles from said cleaning beads onto the surface thereof whereby the cleaning beads present continuous cleaning surfaces, and means for wiping the electrostatically adhering toner particles from the surface of said roll means into a collection receptacle.
Claim 2
Dependent Claim
152 words
Cleaning apparatus for removing electrostatically adhering toner particles from an electrostatic recording surface for reuse in an electrostatic copying system comprising transport means for transporting cleaning beads in sweeping contact with an electrostatic recording surface from which electrostatically adhering toner particles are to be removed, said transport means being connected to an electrical biasing potential of a polarity opposite that of the toner particles and of a magnitude sufficient to remove the particles from the recording surface and onto the cleaning beads, roll positioned in the path of said transport means coupled to an electrical biasing potential of a polarity opposite that of said toner particles and of a magnitude sufficient to attract said toner particles from said cleaning beads onto the surface thereof whereby the cleaning beads present continuous cleaning surfaces, and means for wiping the electrostatically adhering toner particles from the surface of said roll means into a collection receptacle.
Claim 3
Dependent Claim
35 words
Apparatus according to claim 1 including corona generating means or applying a charge of the same polarity as said toner particles to said recording surface before said toner particles are contacted by said cleaning beads.
Claim 4
Dependent Claim
39 words
Apparatus according to claim 1 wherein the electrical biasing potential connected to said transport means ranges from about 200 to 1,000 volts and the electrical biasing potential connected to said roll means ranges from about 1,000 to 2,000 volts.
Claim 5
Dependent Claim
50 words
Apparatus according to claim 1 wherein said cleaning beads are made of magnetizable material and said transport means comprises a cylindrical member adapted for rotation past at least one fixed magnet member having polar orientation to produce radial lines of flux adjacent the electrostatic recording surface and said roll means.
Claim 6
Dependent Claim
35 words
Apparatus according to claim 4 including corona generating means for applying a charge of the same polarity as said toner particles to said recording surface before said toner particles are contacted by said cleaning beads.
Claim 7
Dependent Claim
40 words
Apparatus according to claim 4 wherein the electrical biasing potential connecting to said transport means ranges from about 200 to 1,000 volts and the electrical biasing potential connected to said roll means ranges from about 1,000 to about 2,000 volts.
Claim 8
Dependent Claim
203 words
In an automatic electrostatic copying machine in which an electrostatic recording surface is moved past a series of processing stations including a development station at which an electrostatic latent image is developed by electroscopic toner particles and a transfer station at which the toner particles are transferred to a support sheet, an improvement for removing a residual image from the electrostatic recording surface for use in the copying machine comprising transport means for transporting cleaning beads in sweeping contact with an electrostatic recording surface from which electrostatically adhering toner particles are to be removed, said transport means being connected to an electrical biasing potential of a polarity opposite that of the toner particles and of a magnitude sufficient to remove the particles from the recording surface and onto the cleaning beads, roll means positioned in the path of said transport means and coupled to an electrical biasing potential of a polarity opposite that of said toner particles and of a magnitude sufficient to attract said toner particles from said cleaning beads onto the surface thereof whereby the cleaning beads present continuous cleaning surfaces, and means for wiping the electrostatically adhering toner particles for the surface of said roll means into a collection receptacle.
Claim 9
Dependent Claim
203 words
In an automatic electrostatic copying machine in which an electrostatic recording surface is moved past a series of processing stations including a development station at which an electrostatic latent image is developed by electroscopic toner particles and a transfer station at which the toner particles are transferred to a support sheet, an improvement for removing a residual image from the electrostatic recording surface for use in the copying machine comprising transport means for transporting cleaning beads in sweeping contact with an electrostatic recording surface from which electrostatically adhering toner particles are to be removed, said transport means being connected to an electrical biasing potential of a polarity opposite that of the toner particles and of a magnitude sufficient to remove the particles from the recording surface and onto the cleaning beads, roll means positioned in the path of said transport means and coupled to an electrical biasing potential of a polarity opposite that of said toner particles and of a magnitude sufficient to attract said toner particles from said cleaning beads onto the surface thereof whereby the cleaning beads present continuous cleaning surfaces, and means for wiping the electrostatically adhering toner particles for the surface of said roll means into a collection receptacle.
Claim 10
Dependent Claim
35 words
Apparatus according to claim 7 including corona generating means for applying a charge of the same polarity as said toner particles to said recording surface before said toner particles are contacted by said cleaning beads.
Claim 11
Dependent Claim
40 words
Apparatus according to claim 7 wherein the electrical biasing potential connected to said transport means ranges from about 200 to 1,000 volts and the electrical biasing potential connected to said roll means ranges from about 1,000 to about 2,000 volts.
Claim 12
Independent Claim
141 words
A method of removing and recovering a residual image form an electrostatic recording surface in an electrostatic copying system comprising the steps of presenting magnetizable beads in bristle formation on a moving magnetic transport to the recording surface from which the residual image is to be removed, applying an electrical biasing potential of a polarity opposite that of the residual image and of sufficient magnitude to the transport while the magnetizable beads are in contact with said residual image to mechanically and electrostatically remove the residual image from the surface onto the beads, and then continuously recovering the residual image in reusable form from the beads by applying an electrical biasing potential to a member positioned in the path of the magnetic transport of a magnitude sufficient to remove the residual image from the beads onto the surface of the member.
Claim 13
Independent Claim
141 words
A method of removing and recovering a residual image form an electrostatic recording surface in an electrostatic copying system comprising the steps of presenting magnetizable beads in bristle formation on a moving magnetic transport to the recording surface from which the residual image is to be removed, applying an electrical biasing potential of a polarity opposite that of the residual image and of sufficient magnitude to the transport while the magnetizable beads are in contact with said residual image to mechanically and electrostatically remove the residual image from the surface onto the beads, and then continuously recovering the residual image in reusable form from the beads by applying an electrical biasing potential to a member positioned in the path of the magnetic transport of a magnitude sufficient to remove the residual image from the beads onto the surface of the member.
Claim 14
Dependent Claim
19 words
The method according claim 10 wherein said cleaning beads comprise a magnetizable component covered with an electrically insulating material.
Claim 15
Dependent Claim
19 words
The method according to claim 10 wherein the surface of said transport is coated with an electrically insulating material.
Claim 16
Dependent Claim
23 words
The method according to claim 10 wherein said beads are made of a material having a triboelectric affinity for the image being removed.
Claim 17
Dependent Claim
68 words
The method according to claim 10 wherein the step of recovering the residual image in reusable form from the beads includes applying an electrical biasing potential to a moving member positioned in the path of the magnetic transport of a magnitude sufficient to remove the residual image from the beads onto the surface of the member and then wiping the residual image fRom the surface of the member.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |