← Back to Patent Explorer
US3793066A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for continuously progressively deposition a fluid on a flexible substrate surface

Assignee: Emtec Magnetics GmbH
•
Filing: 1972-01-13
•
Granted: 1974-02-19
•
Expires: 1992-01-13
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A method for applying a fluid having magnetic characteristics to a carrier tape in uniform parallel strips uniformly spaced apart and of symmetrical cross-section. The strips are applied to the carrier tape by deposition from a toothed rotatable cylindrical body. Fluid layers on the peripheral surfaces of the teeth contact the tape with the teeth moving at a higher rate of travel than the moving carrier tape. The teeth deposit the fluid in the spaced strips on the tape surface without contact between the peripheral tooth surface and the tape surface and in such a manner that the deposited strip assumes a symmetrical crosssection. The teeth are preferably spaced from each other circumferentially on the cylindrical body by a distance approximately equal to the circumferential peripheral dimension of the teeth.

Inventors

  • 👤 H Frenken
  • 👤 W Wasser

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 07:36
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/74

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 21 words
The method as claimed in claim 1 wherein the liquid is an extremely intimate mixture of a liquid and magnetic Y-Fe203.
Claim 2
Dependent Claim 27 words
The method as claimed in claim 1 wherein the film thickness on the cylindrical surface is controlled by the step of applying the film to the surface.
Claim 3
Dependent Claim 24 words
The method as claimed in claim 1 wherein the thickness of the layer is controlled by the spacing between teeth and the cylindrical surface.
Claim 4
Dependent Claim 44 words
The method of claim 1 wherein the point of first contact of each layer of liquid and the point of separation between the deposited liquid and the layer are symmetrically spaced from the vertical axis connecting the centers of the printing and guide cylinders.

References Cited (Backward Citations)

US2741215A Cited
US2763204A Cited
US3230106A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-18 1977-08-20 1978-02-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-18 1981-08-20 1982-02-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-18 1985-08-20 1986-02-19 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag