US3777707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic power handling arrangement
Assignee: International Standard Electric Corp
•
Filing: 1971-05-26
•
Granted: 1973-12-11
•
Expires: 1991-05-26
Abstract
Abstract A powder transport and applicator arrangement comprising a vertically arranged roller surrounded by a three-fourth cylindrical shield having a vertically running gap, with the lower ends of both the roller and the shield dipping into a powder bed containing magnetic powder. The roller possesses axially arranged magnetic strips, and the shield on its inner surface helical ones. Rotation of the roller causes magnetic powder from the powder bed to be drawn up the roller. The resultant even coating of powder on the roller is presented via the gap in the shield to a recording surface to develop a magnetic image recorded thereon.
Inventors
- 👤 R Hodges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:52
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/09; G03G15/0921; G06; G06K; G06K15/00; G06K15/02; G06K15/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
A magnetic powder handling apparatus for transporting magnetic powder from a reservoir and applying same to a recorded image on a magnetizable recording medium, comprising first and seoond bodies having lower ends of both bodies in contact with the magnetic powder in the reservoir, the first body having a surface in close proximity to a surface of the second body and adapted for movement relative thereto without altering the separation between said surfaces, each said surface being magnetized to produce a set of discrete strips thereon to which magnetic powder will adhere, the strips of one surface crossing those of the other surface so as to form a plurality of intersections and the strips of both surfaces being inclined to the direction of relative movement of the surfaces.
Claim 2
Dependent Claim
128 words
A magnetic powder handling apparatus for transporting magnetic powder from a reservoir and applying same to a recorded image on a magnetizable recording medium, comprising first and seoond bodies having lower ends of both bodies in contact with the magnetic powder in the reservoir, the first body having a surface in close proximity to a surface of the second body and adapted for movement relative thereto without altering the separation between said surfaces, each said surface being magnetized to produce a set of discrete strips thereon to which magnetic powder will adhere, the strips of one surface crossing those of the other surface so as to form a plurality of intersections and the strips of both surfaces being inclined to the direction of relative movement of the surfaces.
Claim 3
Dependent Claim
27 words
The powder transport arrangement as claimed in claim 1 wherein said surfaces of either or both bodies are provided by the surfaces of sheets of magnetic rubber.
Claim 4
Dependent Claim
21 words
The magnetic powder transport arRangement as claimed in claim 1 wherein the members of each set of strips are regularly spaced.
Claim 5
Dependent Claim
28 words
The magentic powder transport arrangement as claimed in claim 1 wherein the surface of said first body is the curved surface of a cylinder rotatable about its axis.
Claim 6
Dependent Claim
24 words
The powder transport arrangement as claimed in claim 4 wherein the set of strips on at least one of said surfaces are helically disposed.
Claim 7
Dependent Claim
27 words
The powder transport arrangement as claimed in claim 5 wherein the set of strips on the curved surface of the cylinder are disposed in the axial direction.
Claim 8
Dependent Claim
29 words
The magnetic powder transport arrangement as claimed in claim 6 wherein the surface of said second body embraces but does not completely surround the curved surface of the cylinder.
Claim 9
Dependent Claim
196 words
A magnetic powder handling arrangement for transporting magnetic powder from a reservoir and applying same to a recorded image on a magnetizable recording medium, comprising a first surface arranged in close proximity to the recording medium, said first surface having arranged therein a set of magnetic strips capable of attracting magnetic powder, one end of said first surface being in continual contact with the magnetic powder in the reservoir, and a second surface also having a set of magnetic strips arranged therein capable of attracting magnetic powder, said second surface being arranged to be substantially parallel to said first surface and also having one end thereof in continual contact with the powder in the reservoir, said surfaces being arranged to face each other and adapted for relative movement therebetween, with the magnetic strips of one surface arranged to cross the other so as to form a plurality of intersections and further arranged to be inclined with the relative direction of movement between said surfaces, the second surface being so constructed as to expose a portion of said first surface to the recording medium in order for the magnetic powder to be applied to the recording medium.
Claim 10
Dependent Claim
196 words
A magnetic powder handling arrangement for transporting magnetic powder from a reservoir and applying same to a recorded image on a magnetizable recording medium, comprising a first surface arranged in close proximity to the recording medium, said first surface having arranged therein a set of magnetic strips capable of attracting magnetic powder, one end of said first surface being in continual contact with the magnetic powder in the reservoir, and a second surface also having a set of magnetic strips arranged therein capable of attracting magnetic powder, said second surface being arranged to be substantially parallel to said first surface and also having one end thereof in continual contact with the powder in the reservoir, said surfaces being arranged to face each other and adapted for relative movement therebetween, with the magnetic strips of one surface arranged to cross the other so as to form a plurality of intersections and further arranged to be inclined with the relative direction of movement between said surfaces, the second surface being so constructed as to expose a portion of said first surface to the recording medium in order for the magnetic powder to be applied to the recording medium.
References Cited (Backward Citations)
US2832311A
Cited
US3208296A
Cited
US3216349A
Cited
US3437074A
Cited
US3553832A
Cited
US3557751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |