US4171410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic body and method of making same
Assignee: Mayser GmbH and Co KG
•
Filing: 1978-06-29
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Granted: 1979-10-16
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Expires: 1998-06-29
Abstract
Abstract An open-cell synthetic-resin foam body is placed in a fluidized bed of conductive metallic particles having a particle size many times smaller than the cell size of the foam. The particles completely permeate the body and adhere to all of the strands thereof. Thereafter the body is vibrated to free from it particles not directly contacting its strands. The thus coated body is then simultaneously pressed and heated so as to reduce its thickness by a factor of at least two and permanently compress it, thereby forcing all of the particles into good contact with each other for good electrical conductivity.
Inventors
- 👤 Gerd Frob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:19
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/25; Y10T428/254; Y10T428/256
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A method of making a conductive and compressible body, said method comprising the steps of sequentially: coating the strands of a reticulate and generally nonconducting synthetic-resin foam body with a layer of generally conductive particles of a particle size greatly smaller than the cell size of the foam of said body; and simultaneously compressing and heating the coated body to permanently reduce the overall size thereof and to urge said particles into permanent electrically conducting contact with one another.
Claim 2
Independent Claim
79 words
A method of making a conductive and compressible body, said method comprising the steps of sequentially: coating the strands of a reticulate and generally nonconducting synthetic-resin foam body with a layer of generally conductive particles of a particle size greatly smaller than the cell size of the foam of said body; and simultaneously compressing and heating the coated body to permanently reduce the overall size thereof and to urge said particles into permanent electrically conducting contact with one another.
Claim 3
Dependent Claim
11 words
The method defined in claim 1 wherein said particles are metallic.
Claim 4
Dependent Claim
38 words
The method defined in claim 1 wherein said particles are coated on said foam body by applying said particles to and through said foam body and thereafter separating from said foam body particles not directly in contact therewith.
Claim 5
Dependent Claim
31 words
The method defined in claim 3 wherein said particles are applied to said body by orming forming fluidized bed of said particles and submerging said foam body in said fluidized bed.
Claim 6
Dependent Claim
17 words
The method defined in claim 4 wherein particles are separated from said foam body by vibrating same.
Claim 7
Dependent Claim
15 words
The method defined in claim 1 wherein the coated body is compressed in a press.
Claim 8
Dependent Claim
37 words
The method defined in claim 1 wherein said foam body has prior to compression a density of between 20 kg./m 3 and 70 kg/m 3 and kg/m a cell size of between 4 pores/cm and 40 pores/cm.
Claim 9
Dependent Claim
14 words
The method defined in claim 1 wherein said foam body is a urethane foam.
Claim 10
Dependent Claim
38 words
A conductive and elastomeric body comprising a compressed reticulate synthetic-resin foam having a multiplicity of interconnected strands and a coating of conductive particles in good electrical contact with each other substantially completely covering and embedded in said strands.
Claim 11
Dependent Claim
38 words
A conductive and elastomeric body comprising a compressed reticulate synthetic-resin foam having a multiplicity of interconnected strands and a coating of conductive particles in good electrical contact with each other substantially completely covering and embedded in said strands.
Claim 12
Dependent Claim
18 words
The body defined in claim 9 wherein said foam is a reticulate urethane and said particles are metallic.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-15 | 1983-04-16 | 1983-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-15 | 1987-04-16 | 1987-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-15 | 1991-04-16 | 1991-10-16 | $7700.00 | Window Closed / Lapsed |