US3615964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming creased fiber glass blanket
Assignee: Industrial Insulations Inc
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Filing: 1968-09-20
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Granted: 1971-10-26
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Expires: 1988-09-20
Abstract
Abstract An apparatus and method of processing fiber glass to form a blanket of desired density and featuring areas of greater density to provide pockets and/or hinged sections of a desired size and shape. The fibers carry a sparse film of heat-cured binder material holding the fibers in desired relative positions at their points of crossover. The blanket is preferably prepared in a continuous process and, if desired, is laminated to flexible sheet material as, for example, heat-reflecting foil. The hinges formed by the invention technique are resilient and possess a pronounced memory for return to the position in which held while the binder takes a set. The resulting product has many uses including one-piece ducts and liners for a wide variety of chambers, refrigerators, furnaces, and many others.
Inventors
- 👤 Joseph G Malone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:22
CPC Classifications
B; B32; B32B; B32B29/00; B32B29/02; C; C03; C03C; C03C25/00; C03C25/10; B32B15/00; B32B15/14; B32B3/00; B32B3/26; B32B37/00; B32B37/10; B32B37/12; B32B37/14; B32B37/16; B32B37/20; E; E04; E04C; E04C2/00; E04C2/30; E04C2/40; E04C2/405; B32B2262/00; B32B2262/10; B32B2262/101; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T156/1039
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
59 words
That method defined in claim 1 characterized in the steps of forming a plurality of said memory hinges along a surface of said blanket by holding a plurality of narrow strips of the binder-coated fiber glass compressed while heating the binder material along said narrow strip to cure the same and hold the fibers along said strips permanently deformed.
Claim 2
Dependent Claim
39 words
That method defined in claim 2 characterized in the stop of supporting said blanket from the opposed faces thereof while advancing the same through said heated chamber, and severing said blanket into shorter sections extending crosswise of said hinges.
Claim 3
Dependent Claim
54 words
That method defined in claim 1 characterized in the step of laminating a strip of thin flexible sheet material to one surface of the fiber glass blanket to form a continuous striplike blanket of laminated material having a preformed hinge of more densely compressed fiber glass extending along and bonded to one surface thereof.
Claim 4
Dependent Claim
51 words
That method defined in claim 1 characterized in the step of passing said blanket and uncured binder between a pair of conveyor belts at least one of which is shaped to hold a narrow strip of said blanket more densely compressed than the portion to either side of said narrow strip.
Claim 5
Dependent Claim
27 words
That method defined in claim 5 characterized in the step of utilizing conveyor belts of foraminous material to facilitate heating, venting and curing of said binder material.
Claim 6
Dependent Claim
114 words
That method of processing fiber glass to form a unitary heat-insulating blanket of generally uniform density except for narrow strips of higher density fiber glass forming permanent resilient hinges having a pronounced memory capability, said method comprising: distributing filaments of fiber glass coated with uncured resinous binder randomly over conveyor means to a desired uniform depth while advancing completed portions thereof through a heated chamber, pressing the opposite faces of said blanket to compress the fibers to a desired density and including compressing at least a narrow channel of said fibers to a substantially greater density to form a hinge, and holding said fibers compressed as aforesaid while said resinous binder takes a set.
Claim 7
Dependent Claim
54 words
That method defined in claim 7 characterized in the step of forming at three resilient hinges in said blanket lying parallel to one another whereby the blanket issuing from said heated chamber at the conclusion of the curing step is adapted to be folded along said hinges into a duct or the like-appearing assembly.
Claim 8
Dependent Claim
36 words
That method defined in claim 8 characterized in the step of bonding a sealing strip across the abutting lateral edges of said blanket when folded into a duct thereby to hold the same in assembled condition.
Claim 9
Dependent Claim
20 words
That method defined in claim 8 characterized in bonding impervious flexible sheet material to one entire surface of said blanket.
Claim 10
Dependent Claim
61 words
That method defined in claim 8 characterized in the step of laminating heat-reflective foil to the surface of said blanket remote from said hinge-forming channels, forming a duct of said blanket by folding the same along the axes of said hiNges, and bonding a sealing strip of impervious tape across the abutting lateral edges of said duct to form a duct.
Claim 11
Dependent Claim
38 words
That method defined in claim 7 characterized in the step of forming at least two resilient parallel hinges in said blanket spaced to form a one-piece heat-insulating liner for the sides and rear wall of a refrigerator cabinet.
Claim 12
Dependent Claim
51 words
That method defined in claim 12 characterized in the step of compressing said blanket of a selected area and a desired size and configuration while heat-curing said resinous binder material thereby to provide a finished blanket product having permanent hinges and a depressed pocket opening through one face of the blanket.
Claim 13
Dependent Claim
116 words
That method of forming a blanket of fiber glass having a greater density size and shape in certain areas thereof, said method comprising distributing filaments of fiber glass randomly upon a support thereof and bearing a sparse film of uncured resinous binder to provide a blanket assembly of uniform density, heating said blanket assembly while applying greater pressure to a selected area thereof than to other portions of said blanket assembly thereby to increase the density of the fibers thereabout, and holding the fibers so compressed until said binder takes a set thereby to form a resilient porous blanket having a permanent cavity of a desired shape and size opening through one surface of the blanket.
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) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |