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US3620875A
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Electromagnetic adhesive and method of joining material thereby
Assignee: EMABOND Inc A DE CORP
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Filing: 1969-07-28
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Granted: 1971-11-16
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Expires: 1989-07-28
Abstract
Abstract Electromagnetic adhesive comprised of a mixture of a thermoplastic material and ferromagnetic particles having mesh sizes of from 20-200 mesh. The adhesives are employed to bond thermoplastics by the use of inductive heating, the bonding being effected in period of less than two minutes.
Inventors
- 👤 Richard J Guglielmo Sr
- 👤 Nishan G Chookazian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:47
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/14; B29C65/1403; B29C65/1425; B29C65/34; B29C65/36; B29C65/3604; B29C65/3608; B29C65/3612; B29C65/3672; B29C65/3676; B29C65/368; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C65/4855; B29C65/4865; B29C65/487; B29C65/4875; B29C65/4885; B29C65/489; B29C66/00; B29C66/90; B29C66/91; B29C66/914; B29C66/9141; B29C66/91411; B29C66/9161; B29C66/91651; B29C66/919; B29C66/9192; B29C66/91921; B29C66/94; B29C66/949; C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; C08J5/125; C08J5/128; C08K; C08K3/00; C08K3/02; C08K3/08; C09; C09J; C09J201/00; C09J5/00; C09J5/06; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/12; H01F1/14; H01F1/20; H01F1/28; B29C65/1429; B29C65/1435; B29C65/1477; B29C65/148; B29C65/1483; B29C65/52; B29C65/522; B29C65/523; B29C65/526; B29C66/70; B29C66/71; C08L; C08L2666/00; C08L2666/54; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
38 words
The method as defined in claim 1 wherein the weight ratio of ferromagnetic particles passing through a 20 mesh screen and not passing through a 200 mesh screen to thermoplastic material is from about 1:1 to about 2:1.
Claim 2
Dependent Claim
33 words
The method as defined in claim 2 wherein the ferromagnetic particles is a member selected from the group consisting of iron, cobalt, nickel, alloys containing nickel, alloys containing cobalt and alloys containing iron.
Claim 3
Dependent Claim
23 words
The method as defined in claim 3 wherein the thermoplastic material is selected from the group consisting of polyolefins, polystyrenes, polyamides and acetals.
Claim 4
Dependent Claim
33 words
The method as defined in claim 3 wherein the electromagnetic field has a field intensity of from about 1 to about 30 kilowatts and a frequency from about 5 to about 30 megacycles.
Claim 5
Dependent Claim
31 words
The method as defined in claim 3 wherein the ferromagnetic particles are of a size which pass through a 40 mesh screen and do not pass through a 100 mesh screen.
Claim 6
Dependent Claim
67 words
An electromagnetically activatable adhesive composition, comprising a substantially uniform mixture of thermoplastic material and ferromagnetic particles, said ferromagnetic particles having particle sizes which pass through a 20 mesh screen and do not pass through a 200 mesh screen, whereby upon application of an induced electromagnetic field said particles are rapidly heatable by hysteresis and eddy current effects to a temperature above the Curie temperature of said particles.
Claim 7
Dependent Claim
38 words
The adhesive as defined in claim 7 wherein the weight ratio of ferromagnetic particles passing through a 20 mesh screen and not passing through a 200 mesh screen to thermoplastic material is from about 1:1 to about 2:1.
Claim 8
Dependent Claim
34 words
The adhesive composition as defined in claim 8 wherein the ferromagnetic particles is a member selected from the group consisting of iron, cobalt, nickel, alloys containing nickel, alloys containing cobalt and alloys containing iron.
Claim 9
Dependent Claim
23 words
The adhesive as defined in claim 9 wherein the thermoplastic material is selected from the group consisting of polyolefins, polystyrenes, polyamides and acetals.
Claim 10
Dependent Claim
19 words
The adhesive composition as defined in claim 9 wherein the composition is in the form of a solid sheet.
Claim 11
Dependent Claim
18 words
The adhesive composition as defined in claim 9 wherein the composition is in the form of a ribbon.
Claim 12
Dependent Claim
31 words
The adhesive as defined in claim 9 wherein the ferromagnetic particles are of a size which pass through a 40 mesh screen and do not pass through a 100 mesh screen.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |