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US3571559A
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Apparatus for welding thermoplastic synthetic foam blocks
Assignee: Dynamit Nobel AG
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Filing: 1968-12-23
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Granted: 1971-03-23
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Expires: 1988-12-23
Abstract
Abstract Apparatus for welding blocks or other molded forms of synthetic foam materials, such as, for example, thermoplastic polymers, including a welding device incorporating wedge-shaped separating means disposed in advance of a heating wire for traversing the desired location of the seam, whereby the heating wire is able to pass through the location of the seam substantially unobstructed by forces of friction and the like between the wire and the surfaces of the forms to be welded.
Inventors
- 👤 Josef Becker
- 👤 Michale Wienand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:40
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/70; B29C66/72; B29C66/727; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1432; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4324; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81431; B29C66/818; B29C66/8182; B29C66/81821; B29C66/8187; B29C66/81871; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29K; B29K2105/00; B29K2105/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
31 words
Apparatus according to claim 1, wherein said material is a thermoplastic polymer, said separating means having a wedge-shaped cross-sectional configuration tapering in the direction of travel of said welding device means.
Claim 2
Dependent Claim
26 words
Apparatus according to claim 2, wherein said welding device means further includes a common frame means for supporting said heating wire means and said separating means.
Claim 3
Dependent Claim
13 words
Apparatus according to claim 3, wherein said separating means includes a separating sword.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 4, wherein said welding device means further includes at least one pair of guide roller means disposed between said separating means and said heating wire means in fixed positions with respect thereto.
Claim 5
Dependent Claim
13 words
Apparatus according to claim 3, wherein said separating means includes separating roller means.
Claim 6
Dependent Claim
42 words
Apparatus according to claim 6, wherein said separating means includes at least one separating roller means and at least one pair of guide roller means disposed betweeN said separating roller means and said heating wire means in fixed positions with respect thereto.
Claim 7
Dependent Claim
108 words
Apparatus according to claim 2, further comprising a drawing device movable with respect to the articles to be welded in the direction of a welded seam to be formed, and a pair of flexible belt means, each belt having one end thereof secured to a respective stationary support member, extending through the location of the seam to be formed, being folded over upon itself to define a drop-shaped loop, and extending back through the location of the seam to be formed, wherein said two drop-shaped loop portions are disposed in side-by-side relationship and the free ends of each of said two belts are secured within said drawing device.
Claim 8
Dependent Claim
32 words
Apparatus according to claim 8, further including at least one pair of guide roller means disposed between said two drop-shaped loops and said heating wire means in fixed positions with respect thereto.
Claim 9
Dependent Claim
32 words
Apparatus according to claim 3, wherein said means for heating said heating wire means includes a source of electric power and means for regulating the voltage supply to said heating wire means.
Claim 10
Dependent Claim
21 words
Apparatus according to claim 10, further including means for thermally and electrically insulating said heating wire means from said separating means.
Claim 11
Dependent Claim
29 words
Apparatus according to claim 3, wherein said means for supporting the articles to be welded includes two relatively movable slide tables and means for controlling the relative motion thereof.
Claim 12
Dependent Claim
19 words
Apparatus according to claim 1, wherein said compressive pressure is exerted upon the entire area of the abutting surfaces.
Claim 13
Dependent Claim
19 words
Apparatus according to claim 1, wherein said separating means is disposed only in advance of said heating wire means.
Claim 14
Dependent Claim
23 words
Apparatus according to claim 3, wherein said common frame means extends beyond the width of each of the abutting surfaces to be welded.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |