US3778017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for joint manufacture
Assignee: Cebal GP
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Filing: 1971-12-13
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Granted: 1973-12-11
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Expires: 1991-12-13
Abstract
Abstract A plastic joint and apparatus for its manufacture which includes a first molding portion comprising a base supporting a body which can be displaced relative to said base, spring means biasing the body against the base and molding means being movable with respect to the base in response to displacement of the body, and a second molding portion comprising a base plate having a molding groove carrying a channel member of an electrically conductive material and induction heating means to heat the channel member to reduce a blank of a thermoplastic material contained therein, whereby the thermoplastic material is displaced between a gap between sheets of a rigid material to form a continuous closed joint body between the sheets of rigid material, the edges of the sheets being in molded engagement in continuous grooves in the joint body.
Inventors
- 👤 J Doucerain
- 👤 B Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:39
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/02; B29C33/06; B29C43/00; B29C43/32; B29C43/52; B29C70/00; B29C70/68; B29C70/74; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0811
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
206 words
Apparatus for the manufacture of molded joints between sheets to be joined comprising a first mold portion comprising a base having a surface forming a face of said first mold portion, said base defining an annular groove, an annular molding ring movably mounted in said annular groove, a body mounted for displacement relative to said base, means to support said body on said base, spring means on said body to maintain said molding ring outwardly from said surface; a second mold portion comprising a base plate having a face, said base plate having a molding groove corresponding to said molding ring, a channel member positioned in said molding groove, induction heating means adjacent to the entire channel member to heat said channel member to reduce a thermoplastic material to a flowable state; and means to displace at least one of said mold portions relative to the other to position said first and second mold portions in face to face relation, and means to displace said body toward said base to overcome the force of said spring means whereby said molding ring is displaced toward said channel member to cause the thermoplastic material to flow outwardly between the sheets to be joined to form a joint therebetween.
Claim 2
Dependent Claim
206 words
Apparatus for the manufacture of molded joints between sheets to be joined comprising a first mold portion comprising a base having a surface forming a face of said first mold portion, said base defining an annular groove, an annular molding ring movably mounted in said annular groove, a body mounted for displacement relative to said base, means to support said body on said base, spring means on said body to maintain said molding ring outwardly from said surface; a second mold portion comprising a base plate having a face, said base plate having a molding groove corresponding to said molding ring, a channel member positioned in said molding groove, induction heating means adjacent to the entire channel member to heat said channel member to reduce a thermoplastic material to a flowable state; and means to displace at least one of said mold portions relative to the other to position said first and second mold portions in face to face relation, and means to displace said body toward said base to overcome the force of said spring means whereby said molding ring is displaced toward said channel member to cause the thermoplastic material to flow outwardly between the sheets to be joined to form a joint therebetween.
Claim 3
Dependent Claim
39 words
Apparatus as defined in claim 1 wherein said means to support said body on said base includes at least one centering pin on said body and an aperture on said base, said aperture being adapted to receive said pin.
Claim 4
Dependent Claim
64 words
Apparatus as defined in claim 1 wherein said means to support said body on said base includes a plurality of support pins and at least one aperture in said base, said aperture in said base being adapted to receive said support pins and said support pins being fixed to said molding ring to cause displacement of said molding ring when said body is displaced.
Claim 5
Dependent Claim
28 words
Apparatus as defined in claim 1 wherein the surface of said base includes means to affix at least one of the sheets to be joined to said surface.
Claim 6
Dependent Claim
15 words
Apparatus as defined in claim 1 wherein said channel member comprises an electrically conductive material.
Claim 7
Dependent Claim
36 words
Apparatus as defined in claim 1 wherein said induction means includes a plurality of conductors in said base plate adjacent to said molding groove, and means to supply a high frequency alternating current to said conductors.
Claim 8
Dependent Claim
17 words
Apparatus as defined in claim 6 wherein said base plate is constructed of an electrically insulating material.
Claim 9
Dependent Claim
29 words
Apparatus as defined in claim 1 wherein said first mold portion and said second mold portion are constructed of an electrically conductive material and are insulated at their faces.
Claim 10
Dependent Claim
65 words
Apparatus as defined in claim 8 wherein said induction means includes means for supplying a high frequency alternating current to said first mold portion and to said second mold portion and conducting means connecting said first mold portion with said second mold portion, whereby said current can pass from one of said first and second mold portions to the other only through said conducting means.
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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) | 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 |