US3610457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotationally molded hollow article with insert
Assignee: Honeywell International Inc
•
Filing: 1969-07-24
•
Granted: 1971-10-05
•
Expires: 1989-07-24
Abstract
Abstract An insert is affixed to the inner wall of a rotationally molded hollow article by securing a wad of absorbent fibers to the insert and frangibly mounting the insert within the cavity of the mold. Upon rotationally molding a charge of the plastic, a column thereof is formed about the wad between the wall and the insert, and the insert is coated with plastic. After curing, the frangible mount is removed and the cavity in the plastic wall resulting from the removal may be sealed to provide the final product. The method is useful for affixing baffles within rotationally molded liquid storage tanks.
Inventors
- 👤 Vincent J Opalewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:11
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/02; B29C41/08; B29C33/00; B29C33/12; B29C33/14; B29C41/025; B29C41/20; B29C70/00; B29C70/68; B29C70/70; B29C70/74; B29C70/742; B65; B65D; B65D25/00; B65D25/02; B65D25/04; B29C41/04; B29L; B29L2031/00; B29L2031/712; B29L2031/7172
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A rotationally molded hollow article comprising a plastic wall enclosing an interior cavity and having a second cavity in the exterior surface thereof; an insert within said interior cavity coated with said plastic; and a column of said plastic formed integrally with said wall extending inwardly therefrom, said column including a plurality of fibrous wads inert to said plastic, coated with said plastic, and secured to said insert at the point of affixation thereof upon said column.
Claim 2
Dependent Claim
77 words
A rotationally molded hollow article comprising a plastic wall enclosing an interior cavity and having a second cavity in the exterior surface thereof; an insert within said interior cavity coated with said plastic; and a column of said plastic formed integrally with said wall extending inwardly therefrom, said column including a plurality of fibrous wads inert to said plastic, coated with said plastic, and secured to said insert at the point of affixation thereof upon said column.
Claim 3
Dependent Claim
16 words
The hollow article of claim 1 wherein said affixed insert is spaced from said plastic wall.
Claim 4
Dependent Claim
23 words
The hollow article of claim 1 wherein said plurality of fibrous wads does not extend to the exterior surface of said plastic wall.
Claim 5
Dependent Claim
16 words
The hollow article of claim 1 wherein said insert has perforations filled with said plastic coating.
Claim 6
Dependent Claim
22 words
The hollow article of claim 1 additionally comprising a seal in said second cavity in the exterior surface of said plastic wall.
Claim 7
Dependent Claim
13 words
The hollow article of claim 5 wherein said seal is a metal plug.
Claim 8
Dependent Claim
16 words
The hollow article of claim 5 wherein said seal is a welded plug of said plastic.
Claim 9
Dependent Claim
12 words
The hollow article of claim 1 wherein said plastic is a polyamide.
Claim 10
Dependent Claim
13 words
The hollow article of claim 8 wherein said plastic is anionically polymerized e-caprolactam.
Claim 11
Dependent Claim
17 words
The hollow article of claim 9 wherein said plurality of fibrous wads consists of anhydrous cotton fibers.
Claim 12
Dependent Claim
25 words
The hollow article of claim 9 wherein said plurality of fibrous wads consists of borosilicate glass fibers having fiber thickness less than about 0.00020 inch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |