Patent US3786386A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3786386A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic anchoring device for graphic arts

Assignee: Individual
•
Filing: 1972-06-22
•
Granted: 1974-01-15
•
Expires: 1992-06-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Magnetic anchoring device for graphic arts, wherein the magnetic work surface is provided by interposing permanent magnetic cores between ferromagnetic material pole-pieces, having a direction of magnetization for the cores substantially at right angles to said pole-pieces. The device comprises a support of ferromagnetic material having a plurality of parallel slots separated by walls defining a first plurality of pole-pieces fast with said support, a spacer of a magnetic material being placed in each of said slots, and each of said slots having therein a permanent magnet battery or unit comprising an inserted central wall or core of ferromagnetic material which is interposed between two side permanent magnetic elements. The assembly of said inserted walls define a second plurality of pole-pieces alternately interposed to the first plurality of pole-pieces. The surfaces of the magnetic elements contacting each of said inserted walls have always the same polarity, so that the magnetic surface being provided has pole-pieces of one polarity intercalated with polepieces of opposite polarity to said one polarity.

Inventors

  • 👤 B Zaramella
  • 👤 M Cardone
  • 👤 A Grandini

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 13:35
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/02; H01F7/0231; H01F7/0252

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 164 words
A magnetic anchoring device for graphic arts, wherein the magnetic work surface is provided by permanent magnetic cores interposed between ferromagnetic material pole-pieces, having a direction of magnetization for the cores substantially at right angles to said pole-pieces, characterised by comprising a support of ferromagnetic material having a plurality of parallel slots separated by walls defining a first plurality of pole pieces fast with said support; a spacer of non-magnetic material positioned in each of said slots, and each of said slots having therein a permanent magnet battery means comprising an inserted central core means of ferromagnetic material which is interposed between two side permanent magnetic elements, the assembly of said inserted walls defining a second plurality of pole-pieces alternately interposed to the first plurality of pole-pieces; the surfaces of the magnetic elements contacting each of said inserted walls having always the same polarity, so that the magnetic surface has pole-pieces of one polarity intercalated with pole-pieces of opposite polarity to said one polarity.
Claim 2
Dependent Claim 164 words
A magnetic anchoring device for graphic arts, wherein the magnetic work surface is provided by permanent magnetic cores interposed between ferromagnetic material pole-pieces, having a direction of magnetization for the cores substantially at right angles to said pole-pieces, characterised by comprising a support of ferromagnetic material having a plurality of parallel slots separated by walls defining a first plurality of pole pieces fast with said support; a spacer of non-magnetic material positioned in each of said slots, and each of said slots having therein a permanent magnet battery means comprising an inserted central core means of ferromagnetic material which is interposed between two side permanent magnetic elements, the assembly of said inserted walls defining a second plurality of pole-pieces alternately interposed to the first plurality of pole-pieces; the surfaces of the magnetic elements contacting each of said inserted walls having always the same polarity, so that the magnetic surface has pole-pieces of one polarity intercalated with pole-pieces of opposite polarity to said one polarity.
Claim 3
Dependent Claim 17 words
A magnetic anchoring device as claimed in claIm 1, wherein such magnetic elements are of ceramic-plastic material.
Claim 4
Dependent Claim 20 words
A magnetic anchoring device as claimed in claim 1, wherein said pole-pieces are of a thickness not exceeding 2 mm.
Claim 5
Dependent Claim 29 words
A magnetic anchoring device as claimed in claim 1, wherein the height and thickness of each of said magnetic elements are not over 10 mm. and 2 mm., respectively.
Claim 6
Dependent Claim 23 words
A magnetic anchoring device as claimed in claim 1, wherein the air gap length between two adjoining pole-pieces is not over 2 mm.
Claim 7
Dependent Claim 21 words
A magnetic anchoring device as claimed in claim 1, wherein each of said inserted pole-pieces are longitudinally divided into two halves.
Claim 8
Dependent Claim 15 words
A magnetic anchoring device as claimed in claim 1, wherein the configuration thereof is planar.
Claim 9
Dependent Claim 15 words
A magnetic anchoring device as claimed in claim 1, wherein the configuration thereof is cylindrical.

References Cited (Backward Citations)

US2269149A Cited
GB933666A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-01-14 1977-07-16 1978-01-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-01-14 1981-07-16 1982-01-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-01-14 1985-07-16 1986-01-15 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag