# US 4,397,898 A · Thick batt of fibrous insulation

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- Number: US 4,397,898 A
- Document ID: US4397898A
- Status: Granted
- Kind: A
- Application number: 06/365,227
- Filed: 1982-04-05
- Granted: 1983-08-09
- Earliest claimed: 1980-10-20
- Assignees: Manville Service Corporation
- Inventors: Richard J. Ray, Jr.
- Web page: https://patentgrep.com/patent/US4397898A

## CPC

- B26D 3/085: {On sheet material}
- B32B 5/26: another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)}
- Y10T 428/15: Sheet, web, or layer weakened to permit separation through thickness
- Y10T 428/2419: Fold at edge
- Y10T 428/24264: Particular fold structure [e.g., beveled, etc.]
- B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The present invention relates to a method and apparatus for the production of fibrous insulation, especially relatively thick fibrous insulation. Previously some relatively thick insulation has been produced through lamination techniques using a plurality of insulation layers, which possibly included the use of a continuous fibrous hinge as an alignment aid during lamination. However, proper alignment using a continuous hinge is difficult and leaves an objectionable bulge of fibrous material. The present invention eliminates the fibrous bulge of the prior art and provides a more accurate means by which to substantially accurately align the layers of fibrous insulation. A fibrous blanket of insulation is slit by means of a notched cutting blade to provide a plurality of fibrous hinges or fibrous pillars connecting a plurality of fibrous batts whereby upon the application of an adhesive to one or more of the fibrous batts, another of the batts may be folded about the hinges onto the adhesive covered batt and laminated to form the relatively thick insulation product.

## Claims

### Claim 1

A thick batt of fibrous material manufactured by the process of
(a) cutting a blanket of fibrous material into a plurality of individual pieces;
(b) intermittently slitting each piece completely through the blanket to form two portions which are interconnected by discrete pillars of fibrous material;
(c) applying an adhesive to at least one of said interconnected fibrous portions;
(d) folding one of said interconnected fibrous portions onto the other of said fibrous portions, at least the innermost fibers in the folded pillars being uncut and functioning as a hinge to insure proper alignment of the two portions, each of said plurality of pillars being sufficiently narrow as to enable the outermost fibers in the folded pillars to tear so as not to crimp the thusly formed thick batt.