Patent US4803514A successfully refreshed from Google Patents.
Patent US3746204A successfully refreshed from Google Patents.
US3746204A
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Hollow double-wall article
Assignee: Kyoraku Co Ltd
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Filing: 1971-10-20
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Granted: 1973-07-17
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Expires: 1991-10-20
Abstract
Abstract A hollow double-wall article produced by a method at least consisted of positioning at least two tubular plasticized parisons of plastic material at opposite sides of at least one core of a mold, closing half-molds of the mold about the parisons and the core to enclose said parisons within a molding cavity defined by the half-molds and the core, and introducing fluid pressure medium into the parisons, said article including at least two plastic hollow sections being independent of each other which are welded together at one or more adjacent parts thereof, said welding being performed by welding the outer surfaces, together, at least two expanded parisons which are independent of each other, at adjacent parts thereof.
Inventors
- 👤 T Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:16
CPC Classifications
B; B65; B65D; B65D11/00; B65D11/16; B29; B29C; B29C49/00; B29C49/0031; B29C49/02; B29C49/04; B29C49/04102; B29C49/06905; B29C49/0691; B65D19/00; B65D19/0004; B65D19/0006; B65D19/0008; B65D19/001; B65D19/0012; B29C2791/00; B29C2791/004; B29C2791/006; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00049; B65D2519/00069; B65D2519/00258; B65D2519/00263; B65D2519/00273; B65D2519/00278; B65D2519/00283; B65D2519/00288; B65D2519/00313; B65D2519/00318; B65D2519/00328; B65D2519/00343; B65D2519/00547; B65D2519/00552; B65D2519/00557; B65D2519/00562; Y; Y10; Y10S; Y10S220/00; Y10S220/902
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
263 words
An elongated, hollow, open-topped double-walled article of plastics material comprising at least two hollow, double-walled one-piece parts, each of the parts having a. spaced-apart inner and outer walls, each of the inner and outer walls having a generally horizontally extending bottom portion and a generally upwardly extending side wall portion integrally joined to a peripheral edge portion of the said bottom portion, the bottom portion of each of the inner and outer walls having a generally horizontally extending edge, the side wall portion of each of the inner and outer walls having a pair of upwardly extending end edges and a top edge, the end edges of the inner and outer side wall portions extending upwardly from the ends of the respective horizontally extending edges of the bottom portion inner and outer walls, b. a generally U-shaped substantially planar wall having a pair of spaced-apart generally upwardly extending portions and a generally horizontally extending bottom portion, the generally horizontally exending bottom portion of the U-shaped end wall extending between the horizontally extending edges of the bottom portions of the inner and outer walls and being integrally joined thereto, each of the upwardly extending portions of the U-shaped end walls extending between upwardly extending edges of the side wall portions of the inner and outer walls and being integrally joined thereto, and c. a top wall extending between the top edges of the side wall portions of the inner and outer walls and being integrally joined thereto, the generally U-shaped wall of each part being welded to the generally U-shaped wall of another part.
Claim 2
Dependent Claim
263 words
An elongated, hollow, open-topped double-walled article of plastics material comprising at least two hollow, double-walled one-piece parts, each of the parts having a. spaced-apart inner and outer walls, each of the inner and outer walls having a generally horizontally extending bottom portion and a generally upwardly extending side wall portion integrally joined to a peripheral edge portion of the said bottom portion, the bottom portion of each of the inner and outer walls having a generally horizontally extending edge, the side wall portion of each of the inner and outer walls having a pair of upwardly extending end edges and a top edge, the end edges of the inner and outer side wall portions extending upwardly from the ends of the respective horizontally extending edges of the bottom portion inner and outer walls, b. a generally U-shaped substantially planar wall having a pair of spaced-apart generally upwardly extending portions and a generally horizontally extending bottom portion, the generally horizontally exending bottom portion of the U-shaped end wall extending between the horizontally extending edges of the bottom portions of the inner and outer walls and being integrally joined thereto, each of the upwardly extending portions of the U-shaped end walls extending between upwardly extending edges of the side wall portions of the inner and outer walls and being integrally joined thereto, and c. a top wall extending between the top edges of the side wall portions of the inner and outer walls and being integrally joined thereto, the generally U-shaped wall of each part being welded to the generally U-shaped wall of another part.
Claim 3
Dependent Claim
24 words
The article of claim 1 in which the space between the inner and outer walls of each part is filled with a foamed plastic.
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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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |