US2210321A

US2210321A - Spot-saturated composition board

Info

Publication number: US2210321A
Application number: US271013A
Authority: US
Inventors: Eugene C Knoblock
Original assignee: MASTIC ASPHALT CORP
Current assignee: MASTIC ASPHALT Corp
Priority date: 1939-05-01
Filing date: 1939-05-01
Publication date: 1940-08-06
Anticipated expiration: 1957-08-06

Description

' g- 6, 1940- I E. c. KNOBLOCK 2.210321 SPOT-SATURATED COMPOSITION BOARD Filed May 1. 1959 Fla. i.

fZ/GE/VE 6. /i 5406 BY m5? 7% ATTORNEYS.

Patented Aug. 6, 1940 2 UNITED STATES.

sro'r- SATURATED como SITION noann Eugene (J. Knoblock, South Bend, Ind., assignor to .Mastic Asphalt Corporation, South: Bend, Ind., a corporation of Indiana Application May 1, 1939, Serial No. 271,013

9 Claims.

This invention relates to spot-saturated composition board, and particularly to such mate-' rial adapted for use as exterior building covering material.

Composition board, provided with a waterproof and decorative coating, is obtaining increasing public acceptance for use as an exterior building-covering material. Asphalt or other -bil23li112215 plastic material provides an effective weatherproofing medium for the exterior face of the board, and also constitutes an excellent I medium for obtaining adhesion of mineral surfacing particles to provide a decorative masonrysimulating face. Also, the composition board may be provided with a shallow surface saturation to increase its weatherproof qualities. However, building covering members having a composition board base, and particularly masonrysimulating -siding members, generally must be nailed at points which are exposed to the weather. Each such exposed nailing point is a potential source of trouble and failure. For example, a nail may be driven too deeply, so that its head fractures the fibrous constituents of the board adjacent its surface and exposes the same to the weather, with the result that the fibers absorb moisture and cause compacted fibers of the board to expand and thus weaken the board and lead to leakage of the board at that point. Also, the mere driving of a nail through the board in proper manner mayleave a minute passage around the nail for entry of water therein, as by capillary action by reason of the weakness of the board and the softness thereof which makes it readily penetrable. TheseJonditions pertain despite the best efforts of manufacturers and applicators to avoid them, 'and despite the quality of waterproofing materials used in manufacture, or care exercised in application. Even the practice of sealing over the nail head with waterproofing during application does not fully solve the problem.

It is, therefore, the primary object of this invention to provide a composition board which is provided with a restricted portion thereof, at which a nail is to be driven, deeply saturated with waterproofing material to rigidify and harden said nailing portion and toswaterproof the board around the nail.

A further object is to provide a composition board having a shallow surface saturation of waterproofing material at all surfaces thereof and spaced nailing portions saturated to a depth at least one-half the thickness of the board but (Cl. -5) I restricted in size to minimize reduction of the insulation values of the board.

A further object is to provide a composition board having a restricted portion thereof deepl saturated from opposite faces thereof. a

A further object is to provide a novel, simple and inexpensive method of deeply saturating composition board at restricted parts thereof.

Other objects will be apparent from the description and appended claims. 10

In the drawing:

Fig. l is a plan view of a building siding member having a composition board base, and illustrating spot-saturated nafl portions in dotted lines. 1

Fig. 2 is a split sectional view of a composition board having spot-saturated nailing portions.

Fig. 3 is a fragmentary view illustrating impaling means adapted to penetrate opposite sides 20 of a composition board preparatory to spot-saturation. r

Fig. 4 is an enlarged fragmentary sectional view of a composition board with a shallow surface saturation and a restricted portion satu- 95 rated the full thickness of the board.

Fig. 5 'is an enlarged fragmentary sectional view of a composition board with a shallow surface saturation and opposite restricted portions deeply saturated from both exterior surfaces.

Fig. 6 is an enlarged fragmentary sectional view of a composition board having a restricted portion deeply saturated from only one surface thereof.

Fig. '7 is an enlarged fragmentary sectional 85 view illustrating a spot saturated composition board building covering member nailed to a sup- 7 m I a Fig. 8 is va fragmentary sectional viewillustrating composition board as in Fig. 5 nailed to, a support.

Fig. 9 is a fragmentary sectional view of a com ventional composition board having a nail driven therethrough.

Referring to the drawing, which illustrates the 5 preferred embodiment of the invention and particularly to Figs. 1' and '7, which illustrate-a building covering member, the numeral i0 designates a composition board of compacted fibrous material such as Celotex, Insulite or any like rigid fibrous insulation board. It will be understood, of course, that similar material such .as laminated boa'i'd formed of paper, fibrous sheets or the like may also be considered within the scope of this invention. Board l0 may have a spaced points thereof to the sheathing or frame I5 of a building by nails l6. A restricted portion ll of the board at spaced points thereof through which nails l6 are driven is deeply saturated with waterproofing material, such as asphalt. The depth of the saturation is preferably at least one-half the thickness of the board, and portions preferably coincide with one or more of the grooves l3.

The precise character of the saturation portions I! may vary. Thus in the embodiment illustrated in Fig. 7, a plurality of narrow closely grouped passages l8 are formed in and extend entirely through the board. Thus, when the board is dipped in or otherwise treated with plastic waterproofing material while heated or otherwise conditioned in fluid state, for the purpose of obtaining the surface saturation thereof, said material will fiow into and fill the passages l8 and saturate the board around each passage to completely saturate the body at and around the portion thereof having said passages, which saturation will extend the full thickness of the board. The saturated portion so'formed will be of a size substantially greater than the thickness of a nail, so that high precision and accuracy in locating the nail, and exact positioning of the nail perpendicular to the board, will not be necessary; but the size is held to a minimum operative for its purpose in order that the insulation value of the board will not be unnecessarily impaired thereby. Some indicating means, such as a small indention or the like (not shown), will be formed in the coating |2 of the board to guide the applicator in locating said saturated portions. The board is hardened or solidified at portions so that a nail driven therethrough will be firmly anchored therein with a tight waterproof driving fit. Also, the hardened character of portion strengthens the board to give a firm strong connection between the board and its support by means of the nail. Even if water should seep into the interior of the board around the nail, no damage can occur because of the waterproof saturation of the adjacent fibers of the board which prevents penetration to the absorbent unsaturated core of the major portion of the board. Also, the fibers of the board are 'so firmly bound together by the spot saturation I! that a nail emerging from the board will not spread and laterally displace the fibers at the emerging surface as conventionally occurs in nailing composition board as illustrated at I9 in Fig. 9.

Other embodiments of spot saturation are illustrated in Figs. 4 and 5, utilizing the apparatus illustrated in Fig. 3 for their formation. This apparatus comprises a pair of plates or supports 20 mounting a plurality of needles or impaling members 2| in closely spaced or grouped relation. These supports are pressed against opposite faces of composition board III with the needle groups in opposed or substantially registering position to pierce the board and form recesses 22 therein- Needles 2 I are preferably of a length slightly less than one-half the thickness of the board, and may be shorter, depending upon the depth of spot saturation desired. Needles 2| are thin, and they serve not only to form recesses or holes 22, but also to loosen the compacted fibers therearound and therebetween to increase the absorp tive properties of the board at the restricted board portion determined by the number and spacing of the needles impinging therein. When the fibers have thus been loosened, a deep saturation is obtained at the loosened portion incident to the operation of effecting surface saturation in the same manner as above described. The depth of the saturation will depend upon the depth of the loosened portions. Thus where the needles 2| each penetrate substantially one-half the thickness of the board, a saturation ll of full board thickness, as shown in Fig. 4, will result; while a shallower depth of needle penetration will produce a pair of opposed spot saturated portions 23 separated by a narrow unsaturated board portion 24, as shown in Fig. '5. Properly proportioned, the Fig. 5 embodiment will give substantially the same protective, strengthening and sealing properties as full depth saturation, as illustrated in Fig. 8, with the advantage of full insulating value at portion 24. Inasmuch as composition board is of a thickness of one-half inch or more, and it is desirable to keep needles 2| as thin as possible, the method of working inwardly from opposite faces of the board is of greater practical advantage than the Fig. 7 embodiment, as will be obvious.

While the best results are obtained by the method and embodiments above described, other methods may also be employed with good results. Thus, .where surface saturation is unimportant or undesirable, a deep spot saturation 25, as illustrated in Fig. 6, may be obtained to give the advantages sought. An illustrative method for obtaining this result is to preheat a limited portion of the board to be saturated, and then to force a fiow of fiuid waterproofing material under pressure through an outlet which is pressed against the face of the board to confine the fluid discharge to a localized portion of the board with the pressure of the fluid sufficient to produce the desired penetration thereof into the board. A thinner grade or character of waterproofing than may be used in the preferred method gives the best results in this method.

I claim:

1. A rigid composition board formed of compacted fibrous material having a plurality of spaced restricted nailing portions thereof saturated with waterproofing material to a depth at least one-fourth the thickness of the board to bind together the constituent fibers of the board for tight waterproof fit with nails driven therethrough, said board retaining the insulation properties and continuous fibrous character thereof substantially unimpaired throughout.

2. The construction defined in claim 1, wherein said waterproofing material is of plastic character and said nailing portion is spaced from the edge of the board.

3. The construction defined in claim 1, wherein said board is saturated at all surfaces thereof to a depth not greater than one-half the depth of saturation at said restricted nailing portion.

4. A rigid composition board formed of com pacted fibrous material which normally resists saturation with a plastic, said fibrous material having a plurality of spaced portions of restricted dimensions whose porosity is greater than the remainder of the board, and plastic material penetrating said restricted porous portions to waterproof the same and bind the fibrous material together in hardened and rigldified nailing portions, said fibrous material being substantially continuous throughout the board.

5. A composition board formed of compacted fibrous material, having a plurality of small deep closely grouped openings therein which loosen the fibers of the board without substantially varying the continuity thereof, and plastic filling said openings and saturating-the fibrous material-therebetween to form a nailing portion in the board completely surrounded by unsaturated fibrous material retaining the insulating properties of the board substantially unimpaired, said nailing portion being of substantially uniform hardness throughout.

6. The construction defined in claim 5, wherein said openings are arranged in two groups each of a depth less than one-half the thickness of the board and atopposite faces of the board to provide opposed restricted portions of deep saturation.

7. The construction defined in claim 5, wherein the portions of the board adjacent each surface thereof are saturated with said plastic to a shallow depth to retain the major portion of the board unsaturated and its insulation values substantially unimpaired.

8. A rigid composition board formed of compacted fibrous material having an imperforate nailing portion thereof saturated with waterproofing material to bind together the constituent fibers of the board for tight waterproof fit with a nail driven therethrough, said nailing portion beingof restricted size to retain the full insulating value of the board throughout the major portion thereof.

9. A rigid composition board formed of compacted fibrous material having at least one surface portion shallowly impregnated with waterproofing material, said board having a small portion thereof impregnated with waterproofing material to a much greater depth to uniformly harden the board throughout said portion and accommodate nailing thereof without materially reducing the insulation value 01' the board as a whole and without substantially altering the continuity of the fibrous material.

EUGENE C. KNOBLOCK.

DISCLAIMER '2,210,321.-Eugene 0'. Knobloclc, South Bend, Ind. SPOT-SATURATED COMPOSITION 1940. Disclaimer filed February 12, 1944,

BOARD. Patent dated August 6,

by the assignee, Mastic Asphalt Corporation. Hereby enters this disclaimer to claim 9 of said patent.

[Qflicial Gazette March 14, 1944.]