US3889444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for packaging fiber glass insulation
Assignee: Certainteed LLC
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Filing: 1974-04-08
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Granted: 1975-06-17
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Expires: 1994-04-08
Abstract
Abstract A method and apparatus for packaging compressible material, fiber glass insulation in particular, in integrated mat form is described. The method involves sealing the roll to be packaging in a fluid impervious bag, applying a vacuum to the bag for a vacuum source shaped in the manner to insure uniform evacuation of air from the interior of the fluid impervious bag and restraining the reduced package with a restraining tube to prevent springback. Specific details of the vacuum unit are described.
Inventors
- 👤 Frank H Davis
- 👤 Jr Homer O Wolfe
- 👤 Billy D Clapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:20
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/20; B65B1/26; B65B31/00; B65B31/04; B65B31/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A method of packaging a fiberglass sheet of insulation comprising the steps of a. forming a fiberglass sheet of insulation into a spiral roll, b. positioning an airtight bag over said roll. c. providing a cone-like chamber within said bag against the open end of said roll, said chamber having a diameter in the range of one-fifth to one-third of the diameter of said roll, d. applying a vacuum from said chamber to the interior of said roll, to evacuate air therefrom to compress said spiral layer of insulation sufficient to reduce the size of said roll and insufficient to produce a permanent deformation in the insulation thickness e. and then restraining said roll at the compressed size whereby the thickness recovery of said restrained sheet of insulation is substantially equal to the thickness recovery of a standard non vacuum packaged roll of a sheet of insulation.
Claim 2
Independent Claim
147 words
A method of packaging a fiberglass sheet of insulation comprising the steps of a. forming a fiberglass sheet of insulation into a spiral roll, b. positioning an airtight bag over said roll. c. providing a cone-like chamber within said bag against the open end of said roll, said chamber having a diameter in the range of one-fifth to one-third of the diameter of said roll, d. applying a vacuum from said chamber to the interior of said roll, to evacuate air therefrom to compress said spiral layer of insulation sufficient to reduce the size of said roll and insufficient to produce a permanent deformation in the insulation thickness e. and then restraining said roll at the compressed size whereby the thickness recovery of said restrained sheet of insulation is substantially equal to the thickness recovery of a standard non vacuum packaged roll of a sheet of insulation.
Claim 3
Dependent Claim
28 words
The method defined in claim 1 wherein said cone-like chamber is formed at the end of said roll between the center, and the bottom edge of said roll.
Claim 4
Dependent Claim
19 words
The method defined in claim 1 wherein said chamber has a diameter about one-third the diameter of said roll.
Claim 5
Dependent Claim
26 words
The method defined in claim 1 wherein said air is evacuated from said roll on substantially parallel flow paths, said flow paths ending in said chamber.
References Cited (Backward Citations)
US3458966A
Cited
US3511020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |