Patent US3770361A successfully refreshed from Google Patents.
US3770361A
Expired / Lapsed
US
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Thermofixing apparatus for synthetic-resin slide-fastener
Assignee: Opti Holding AG
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Filing: 1971-02-16
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Granted: 1973-11-06
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Expires: 1991-02-16
Abstract
Abstract An apparatus for thermofixing continuous synthetic-resin slidefastener coupling elements of the coil or meander type has an elongated shaping member formed with a series of beds that snugly receive the coupling-element turns to set or form the shape thereof. A source of electric energy is coupled to a portion of this member to heat it and thereby conductively heat the element along the heated portion. The member can be an endless band which is intermittently or continuously displaced over contacts which pass a current through it to heat it, or through a coil to heat it inductively. Downstream of the heating station the band is cooled, prior to detachment therefrom of the thermofixed coupling element. The contacts can comprise a pair of spaced-apart rollers connected to one side of the electric-power source and therebetween another contact connected to the other side of the source.
Inventors
- 👤 H Heimberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:28
CPC Classifications
A; A44; A44B; A44B19/00; A44B19/10; A44B19/12; B; B29; B29D; B29D5/00; Y; Y10; Y10S; Y10S425/00; Y10S425/814
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
An apparatus for thermally treating a multiturn continuous synthetic-resin slide-fastener coupling element comprising: an endless sheet-metal band provided with two transversely spaced mutually parallel upstanding rows of longitudinally spaced tongues bent from the band and forming a series of beds each snugly receiving a respective turn of the element; a source of electric power; and means coupling said source to said band for heating same only along a predetermined stretch of said series of beds and thereby conductively heating the element in said stretch.
Claim 2
Independent Claim
84 words
An apparatus for thermally treating a multiturn continuous synthetic-resin slide-fastener coupling element comprising: an endless sheet-metal band provided with two transversely spaced mutually parallel upstanding rows of longitudinally spaced tongues bent from the band and forming a series of beds each snugly receiving a respective turn of the element; a source of electric power; and means coupling said source to said band for heating same only along a predetermined stretch of said series of beds and thereby conductively heating the element in said stretch.
Claim 3
Dependent Claim
30 words
The apparatus defined in claim 1, further comprising means for advancing said band, said means coupling said source to said band being provided along said band at a heating station.
Claim 4
Dependent Claim
44 words
The apparatus defined in claim 2 wherein said means coupling said source to said band includes a pair of contacts engaging said band and on spaced downstream of the other, and conductors between each of said contacts and a respective side of said source.
Claim 5
Dependent Claim
40 words
The apparatus defined in claim 3 wherein said means includes a third contact engaging said band upstream of said first-mentioned contacts and a conductor connecting said third contact to the same side of the source as the furthest downstream contact.
Claim 6
Dependent Claim
16 words
The apparatus defined in claim 3 wherein at least one of said contacts is a roller.
Claim 7
Dependent Claim
18 words
The apparatus defined in claim 2, further comprising means downstream of said heating station for cooling said band.
Claim 8
Dependent Claim
25 words
The apparatus defined in claim 1 wherein said means coupling said source to said band is an induction coil adjacent said band at said station.
Claim 9
Dependent Claim
16 words
The apparatus defined in claim 7 wherein said source supplies ultrasonic alternating current to said coil.
Claim 10
Independent Claim
60 words
An apparatus for thermally treating a multiturn continuous synthetic-resin slide-fastener coupling element and having an endless sheet-metal band provided with two transversely spaced mutually parallel upstanding rows of longitudinally spaced tongues bent from said band and forming a series of beds each receiving a respective turn of the element and means for heating the band along a predetermined stretch thereof.
Claim 11
Independent Claim
60 words
An apparatus for thermally treating a multiturn continuous synthetic-resin slide-fastener coupling element and having an endless sheet-metal band provided with two transversely spaced mutually parallel upstanding rows of longitudinally spaced tongues bent from said band and forming a series of beds each receiving a respective turn of the element and means for heating the band along a predetermined stretch thereof.
References Cited (Backward Citations)
US2395920A
Cited
US3212137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |