US3802591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A synthetic resin box with double wall structure
Assignee: Mitsubishi Chemical Corp
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Filing: 1972-01-13
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Granted: 1974-04-09
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Expires: 1992-01-13
Abstract
Abstract A synthetic resin-made box with double wall structure, adapted for use as the box frame of a refrigerator or the like, includes a double-walled box body of a synthetic resin with wall sections constituting the inner wall of the box body formed integrally. The wall sections constituting the outer wall of the box body are formed separately and extend obliquely outwardly with one edge each thereof connected to the respective inner wall sections. After molding the outer wall sections are brought to normal positions extending horizontally or vertically in adjacent relation to the inner wall sections. The adjacent edges of the outer wall sections are connected by means of coupling members. The the space defined between the inner wall and outer wall is filled with a heat insulating material. The open rear end of the box body is closed with a closure plate.
Inventors
- 👤 K Mizushima
- 👤 Y Yada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:53
CPC Classifications
A; A47; A47B; A47B55/00; A47B47/00; A47B47/04; A47B47/042; F; F25; F25D; F25D23/00; F25D23/06; F25D23/062; F25D23/064; F25D2500/00; F25D2500/02; Y; Y10; Y10S; Y10S220/00; Y10S220/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
206 words
A box having a double wall structure of injection molded synthetic resin, said box comprising: a box-shaped inner wall having a first end, a second end and a plurality of wall sections formed integrally with said second End and with each other, said wall sections expanding outwardly toward said first end; an outer wall having an open end and a plurality of wall sections, each of said wall sections of said outer wall being integrally formed with one of said wall sections of said inner wall at said first end thereof, said wall sections of said outer wall being separated at the adjacent side edges thereof, said wall sections of said outer wall being molded to normally diverge outwardly toward said open end of said outer wall; said wall sections of said outer wall being deformed toward said wall sections of said inner wall with said adjacent side edges of said wall sections of said outer wall in contact to define a space between said wall sections of said inner and outer walls; a plurality of separate coupling members, each of said coupling members securely connecting said adjacent side edges of said wall sections of said outer wall; and a heat insulating material filling said space.
Claim 2
Dependent Claim
206 words
A box having a double wall structure of injection molded synthetic resin, said box comprising: a box-shaped inner wall having a first end, a second end and a plurality of wall sections formed integrally with said second End and with each other, said wall sections expanding outwardly toward said first end; an outer wall having an open end and a plurality of wall sections, each of said wall sections of said outer wall being integrally formed with one of said wall sections of said inner wall at said first end thereof, said wall sections of said outer wall being separated at the adjacent side edges thereof, said wall sections of said outer wall being molded to normally diverge outwardly toward said open end of said outer wall; said wall sections of said outer wall being deformed toward said wall sections of said inner wall with said adjacent side edges of said wall sections of said outer wall in contact to define a space between said wall sections of said inner and outer walls; a plurality of separate coupling members, each of said coupling members securely connecting said adjacent side edges of said wall sections of said outer wall; and a heat insulating material filling said space.
Claim 3
Dependent Claim
17 words
A box as claimed in claim 1, wherein said second end of said inner wall is closed.
Claim 4
Dependent Claim
27 words
A box as claimed in claim 1, wherein said second end of said inner wall has an opening therein, and further comprising a plate closing said opening.
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |