US3959798A
Expired / Lapsed
US
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Selective wetting using a micromist of particles
Assignee: International Business Machines Corp
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Filing: 1974-12-31
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Granted: 1976-05-25
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Expires: 1994-12-31
Abstract
Abstract Selective or controlled "wetting" of particles to the surface of a substrate or medium is effected by ultrasonically generating a micromist of small nebulized magnetic particles, typically of micron or submicron size. In the absence of a magnetic field, exposure of the surface of the substrate or medium to the micromist fails to produce any "wetting" of the particles to the surface. In the presence of a magnetic field, however, the particles are caused to locally "wet" the surface in accordance with the field pattern. Use of a micromist of magnetic ink particles for printing, typing and copying applications is described.
Inventors
- 👤 Frederick Hochberg
- 👤 Keith S. Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:45
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/215; B05; B05B; B05B17/00; B05B17/04; B05B17/06; B05B17/0607; B05B17/0615; B05B7/00; B05B7/0012; G; G03; G03G; G03G19/00
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
105 words
A process for selectively depositing particles on a medium therefor, comprising the steps of: generating a magnetic micromist of particles, said micromist of particles including a carrier gas for carrying said particles, said particles being of sufficiently small particle size so as to fail to wet said medium when said medium is exposed thereto; exposing said medium to said micromist so that said micromist fails to wet said medium in the absence of a magnetic field gradient thereat; and providing a magnetic field gradient at said medium so as to thereby cause said micromist to locally wet said medium in accordance with said field gradient.
Claim 2
Dependent Claim
105 words
A process for selectively depositing particles on a medium therefor, comprising the steps of: generating a magnetic micromist of particles, said micromist of particles including a carrier gas for carrying said particles, said particles being of sufficiently small particle size so as to fail to wet said medium when said medium is exposed thereto; exposing said medium to said micromist so that said micromist fails to wet said medium in the absence of a magnetic field gradient thereat; and providing a magnetic field gradient at said medium so as to thereby cause said micromist to locally wet said medium in accordance with said field gradient.
Claim 3
Dependent Claim
33 words
The process of claim 1 wherein said step of generating a magnetic micromist of particles comprises generating a magnetic micromist of particles having a particle size in the submicron to 30 micron range.
Claim 4
Dependent Claim
34 words
The process of claim 2 wherein said step of generating a magnetic micromist of particles comprises generating a magnetic micromist of particles having a particle size within an order of magnitude of three microns.
Claim 5
Dependent Claim
33 words
The process of claim 2 wherein said step of generating a magnetic micromist of particles comprises generating a magnetic micromist of particles having a particle size in the submicron to three micron range.
Claim 6
Dependent Claim
32 words
The process of claim 2 wherein said particles to be deposited are magnetic particles and said step of generating a magnetic micromist of particles comprises generating a micromist of nebulized magnetic particles.
Claim 7
Dependent Claim
35 words
The process of claim 5 wherein said particles to be deposited are magnetic ink particles and said step of generating a micromist of nebulized magnetic particles comprises generating a micromist of nebulized magnetic ink particles.
Claim 8
Dependent Claim
37 words
The process of claim 6 wherein said step of providing a magnetic field gradient at said medium includes providing multiple magnetic field gradients selectively producible at said medium so as to be able to form patterns thereby.
Claim 9
Dependent Claim
44 words
The process of claim 7 wherein said medium is paper and said step of providing multiple magnetic field gradients at said medium comprises providing said multiple magnetic field gradients on the side of said paper opposite to the side thereof exposed to said micromist.
Claim 10
Dependent Claim
83 words
The process of claim 8 wherein said step of providing multiple magnetic field gradients on the side of said paper opposite to the side thereof exposed to said micromist comprises providing said multiple magnetic field gradients by selectively magnetizing a magnetizable medium with individually addressable magnetic write heads to form a pattern thereon and causing said magnetizable medium to come into contact and move with said paper to thereby effect local deposition of said micromist on said paper in accordance with said pattern.
Claim 11
Dependent Claim
69 words
The process of claim 8 wherein said step of providing multiple magnetic field gradients on the side of said paper opposite to the side thereof exposed to said micromist comprises providing said multiple magnetic field gradients by selectively magnetizing individually addressable magnetic write heads to form a pattern thereby and causing said write heads to effect local deposition of said micromist on said paper in accordance with said pattern.
Claim 12
Dependent Claim
65 words
The process of claim 7 wherein said medium is a magnetizable medium and said step of providing multiple magnetic field gradients at said medium comprises addressing said magnetizable medium with selectively addressable magnetic write heads to form patterns thereon whereby as said magnetizable medium is exposed to said micromist local deposition of said micromist on said magnetizable medium is effected in accordance with said pattern.
Claim 13
Dependent Claim
22 words
The process of claim 11 including the steps of providing paper and transferring said pattern from said magnetizable medium to said paper.
Claim 14
Dependent Claim
101 words
Apparatus for selectively depositing particles comprising: substrate means upon which said particles are to be selectively deposited; means for generating a magnetic micromist of said particles including means for providing a carrier gas for carrying said particles with said particles being of sufficiently small particle size so as to fail to wet said substrate means in the absence of a magnetic field thereat when said substrate means is exposed thereto; and means to selectively provide a magnetic field gradient at said substrate means to thereby cause said micromist to locally wet said substrate means in accordance with said magnetic field gradient.
Claim 15
Dependent Claim
101 words
Apparatus for selectively depositing particles comprising: substrate means upon which said particles are to be selectively deposited; means for generating a magnetic micromist of said particles including means for providing a carrier gas for carrying said particles with said particles being of sufficiently small particle size so as to fail to wet said substrate means in the absence of a magnetic field thereat when said substrate means is exposed thereto; and means to selectively provide a magnetic field gradient at said substrate means to thereby cause said micromist to locally wet said substrate means in accordance with said magnetic field gradient.
Claim 16
Dependent Claim
21 words
The apparatus as set forth in claim 13 wherein said small particle size is in the submicron to 30 micron range.
Claim 17
Dependent Claim
22 words
The apparatus as set forth in claim 14 wherein said small particle size is within an order of magnitude of 3 microns.
Claim 18
Dependent Claim
21 words
The apparatus as set forth in claim 14 wherein said small particle size is in the submicron to three micron range.
Claim 19
Dependent Claim
37 words
The apparatus as set forth in claim 14 wherein said particles are magnetic ink particles and said means for generating a magnetic micromist of said particles comprises means for generating a micromist of nebulized magnetic ink particles.
Claim 20
Dependent Claim
28 words
The apparatus as set forth in claim 17 wherein said means to selectively provide a magnetic field gradient include magnetic write head means comprising multiple electromagnets individually addressable.
Claim 21
Dependent Claim
37 words
The apparatus as set forth in claim 18 wherein said means to selectively provide a magnetic field gradient is on the side of said substrate means which is opposite to the side thereof exposed to said micromist.
Claim 22
Dependent Claim
14 words
The apparatus as set forth in claim 19 wherein said substrate means is paper.
Claim 23
Dependent Claim
13 words
The apparatus as set forth in claim 20 wherein said paper is movable.
Claim 24
Dependent Claim
40 words
The apparatus as set forth in claim 21 wherein said means to selectively provide a magnetic field gradient include magnetizable media means and wherein said magnetic write head means is selectively addressed to magnetically write on said magnetizable media means.
Claim 25
Dependent Claim
36 words
The apparatus as set forth in claim 22 wherein said magnetizable media means is on the side of said paper which is opposite to the side thereof exposed to said micromist and is in contact therewith.
Claim 26
Dependent Claim
16 words
The apparatus as set forth in claim 23 wherein said magnetic write head means is movable.
Claim 27
Dependent Claim
51 words
The apparatus as set forth in claim 18 wherein said substrate means are magnetizable media means selectively addressable by said magnetic write head means so as to form magnetic patterns therein which are directly exposed to said micromist to form micromist patterns thereon in accordance with the magnetically written patterns therein.
Claim 28
Dependent Claim
25 words
The apparatus as set forth in claim 25 wherein means are provided to transfer said micromist patterns written upon said magnetizable media means to paper.
Claim 29
Dependent Claim
15 words
The apparatus as set forth in claim 21 wherein magnetic write head means is movable.
Claim 30
Dependent Claim
56 words
The apparatus as set forth in claim 27 wherein the said multiple electromagnets of said magnetic write head means are arranged to be selectively addressable so as to create said field gradient in the forms of patterns adjacent said paper to thereby induce wetting of said micromist onto said paper in the form of said patterns.
Claim 31
Dependent Claim
105 words
Apparatus for selectively depositing magnetic ink particles onto a substrate, comprising: means to produce a micromist of said magnetic ink particles including means for providing a carrier gas for carrying said particles with said micromist having particle sizes within the submicron to 30 micron range so that said particles fail to wet said substrate in the absence of a magnetic field thereat; means to cause said substrate to be exposed to said micromist of magnetic ink particles; and means to produce a magnetic field gradient pattern at said substrate to cause said magnetic ink particles to locally wet said paper in accordance with said pattern.
Claim 32
Dependent Claim
105 words
Apparatus for selectively depositing magnetic ink particles onto a substrate, comprising: means to produce a micromist of said magnetic ink particles including means for providing a carrier gas for carrying said particles with said micromist having particle sizes within the submicron to 30 micron range so that said particles fail to wet said substrate in the absence of a magnetic field thereat; means to cause said substrate to be exposed to said micromist of magnetic ink particles; and means to produce a magnetic field gradient pattern at said substrate to cause said magnetic ink particles to locally wet said paper in accordance with said pattern.
Claim 33
Dependent Claim
13 words
The apparatus as set forth in claim 29 wherein said substrate is paper.
Claim 34
Dependent Claim
38 words
The apparatus as set forth in claim 30 wherein said means to produce a magnetic field gradient pattern is on the side of said paper opposite to the side thereof exposed to said micromist of magnetic ink particles.
Claim 35
Dependent Claim
27 words
The apparatus as set forth in claim 31 wherein said means to produce a magnetic field gradient pattern include magnetic write head means having individually addressable electromagnets.
Claim 36
Dependent Claim
29 words
The apparatus as set forth in claim 32 wherein said means to produce a magnetic field gradient pattern include magnetizable media means selectively addressable by said individually addressable electromagnets.
Claim 37
Dependent Claim
127 words
Apparatus for selectively depositing particles comprising: substrate means including movable paper means upon which said particles are to be selectively deposited; means for generating a magnetic micromist of nebulized ink particles of particle size in the submicron to 30 micron range so as to not wet said substrate means in the absence of a magnetic field thereat when said substrate means is exposed thereto; and means to selectively provide a magnetic field gradient at said substrate means including magnetic write head means of multiple electromagnets individually addressable and positioned on the side of said substrate means which is opposite to the side thereof exposed to said micromist so as to thereby cause said micromist to locally wet said substrate means in accordance with said magnetic field gradient.
Claim 38
Dependent Claim
127 words
Apparatus for selectively depositing particles comprising: substrate means including movable paper means upon which said particles are to be selectively deposited; means for generating a magnetic micromist of nebulized ink particles of particle size in the submicron to 30 micron range so as to not wet said substrate means in the absence of a magnetic field thereat when said substrate means is exposed thereto; and means to selectively provide a magnetic field gradient at said substrate means including magnetic write head means of multiple electromagnets individually addressable and positioned on the side of said substrate means which is opposite to the side thereof exposed to said micromist so as to thereby cause said micromist to locally wet said substrate means in accordance with said magnetic field gradient.
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) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |