US3050908A

US3050908A - Self-sealing shingle

Info

Publication number: US3050908A
Application number: US43611A
Authority: US
Inventors: Walter E Schenk
Original assignee: B F NELSON Manufacturing Co
Current assignee: B F NELSON MANUFACTURING Co
Priority date: 1960-07-18
Filing date: 1960-07-18
Publication date: 1962-08-28
Anticipated expiration: 1979-08-28

Description

Aug; 8, 1962 w. E. SCHENK 3,050,908

SELF-SEALING SHINGLE Filed July 18, 1960 2 Sheets-Sheet 1 FIG 1 2 LTER E. $CHENK AT TORNE YS Aug. 28, 1962 w. E. SCHENK SELF-SEALING SHINGLE 2 Sheets-Sheet 2 Filed July 18, 1960 AT TORNE Ys United States Patent 3,050,908 SELF-SEALING SHINGLE Walter E. Schenk, Minneapolis, Minn., assignorto The B. F. Nelson Manufacturing Company, Minneapolis, Minn., a corporation of Minnesota Filed July 18, 1960, Ser. No. 43,611 Claims. (Cl. 50-243) My invention relates to flexible roofing shingles of the composition type and more particularly to improvements in self-sealing shingles of this general class.

Still more specifically my invention relates to flexible strip shingles of the asphalt composition type. Such shingles conventionally includes a head lap portion and an exposure portion which is divided into a plurality of laterally spaced exposure tabs by means of vertical slots or cutout portions which extend from the lower edge of the exposure portion to substantially the medial line of the shingle.

An important object of my invention is the provision of novel means for securely adhering the exposure portion of each shingle in a roof to the head lap portion of the shingle immediately therebelow, whereby the flexible exposure tabs will be rendered unliftable even by the strongest of winds, or the most adverse of weather conditions.

A still further and highly important object of my invention is the provision of a shingle of the class immediately above described which will automatically cause selfsealing engagement between the lower edge of each exposure tab in a roof with the head lap portion of the shingle immediately therebelow, under the action of gravity.

A still further object of my invention is the provision of a device of the class above described wherein adhesive means is carried by each of the shingles in a manner and in a position to permit stacking of the shingles in the conventional manner, for purposes of shipment and storage, without fear of causing a sealing relationship to be set up between the shingles in a bundle.

The above and still further objects of my invention will become apparent from the following detailed specification, appended claims, and attached drawings.

Referring to the drawings wherein like reference characters indicate like parts throughout the several views:

FIG. 1 is a view in top plan of a shingle formed in accordance with my invention;

FIG. 2 is a fragmentary view of a roof formed from the shingles of FIG. 1;

FIG. 3 is an enlarged fragmentary sectional view as seen from the line 33 of FIG. 2; and

FIG. 4 is a cross-sectional view illustrating a plurality of shingles formed in accordance with my invention stacked one above the other to form a bundle.

Referring with greater particularity to the drawings, the numeral 1 indicates in its entirety an elongated generally rectangular flexible strip shingle of conventional shape and preferably formed from asphalt composition. The shingle 1 comprises an elongated head lap portion 2 at its upper end and an exposure portion, identified in "ice coatings form no part of the instant invention, none is here shown in detail.

For the purpose of imparting self-sealing qualities to shingles of the type above described, the upper surface 7 thereof is formed with a groove or recess 9 which, preferably and as shown, is gently dished transversely and extends from the opposite sides 10 uninterruptedly. Also preferably and as shown, the recess 9 is so positioned that the deepest central portion 11 corresponds approximately to the medial line of the shingle 1, the extreme lower limits 12 of said recess 9 extending slightly below the upper limits 13 of the slots or cutouts 5. Within the deepest central portion 11 of the recess 9, I provide a coating of adhesive 14, preferably having pressure-sensitive char acteristics. As shown, the adhesive coating 14 is in the nature of intermittent longitudinally spaced strips 15.

Referring to FIG. 4, it will be observed that the upper limits 16 of the adhesive strips 15 lie below the plane of the upper surface 7 of the shingle 1. This arrangement makes it possible to stack and/ or bundle, for purposes of storage and shipment, any desired number of my shingles, as indicated by the letter A, without causing or permitting a sealing relationship to be set up between the adhesive strips 15 and the flat lower surfaces 8 of the immediately overlying shingles 1.

On the other hand, as indicated by FIGS. 2 and 3 the lower edge portion 6 of the exposure tabs 4 fall under the action of gravity into the grooves or recesses 9 of the immediately underlying shingle 1, and thus into selfits entirety by the numeral 3, at its lower end. Preferably and as shown, the exposure portion 3 is divided into a plurality of exposure tabs 4 by vertically extended longtudinally spaced slots or cutouts 5. Preferably and as shown, the cutouts 5 extend from the lower edge 6 of the exposure portion 3 to points close to but immediately below the medial line of the shingle 1. As shown particularly in FIGS. 3 and 4, the upper and lower surfaces 7, 8 of the shingle 1 are flat and generally parallel to each other. Conventionally, the upper surface 7 is covered and protected by a suitable protective coating, such as silica granules. However, in view of the fact that such sealing engagement with the adhesive strips 15, when the shingles 1 of the bundle A are arranged in a conventional manner to form a roof B. Preferably, the adhesive strips 15 may have pressure-sensitive characteristics, although I do not deem this to be essential with my novel construction, in view of the fact that the lower edge portion 6 of the exposure tabs 4 inevitably make contact with the adhesive strips 15 within the underlying grooves or recesses 9, under the action of gravity. Consequently, seal ing contact would, of necessity, be effected with any ad hesive which would become thermoplastic under summer heat, such as Fahrenheit.

My invention has been thoroughly tested and found to be completely. satisfactory for the accomplishment of the above objects, and while I have shown a preferred embodiment thereof, I wish it to be specifically understood that same may be capable of modification without departure from the scope and spirit of the appended claims.

What I claim is:

1. A freely stackable nonadhering self-sealing flexible composition roof shingle body comprising a head lap portion and an exposure portion and having flat generally parallel upper and bottom surfaces, said upper surface having an upwardly opening recess positioned between said head lap and exposure portions to receive the lower free edge of the exposure portion of a shingle overlapping said head lap portion when laid in normal course relationship, an adhesive coating in said recess, the upper limits of said coating lying below the plane of the upper surface of said head lap and exposure portions, whereby the free edge of said exposure portion terminates within the confines of said recess to be depressed therein and anchored by said adhesive coating in use and for purposes of shipment and storage a plurality of said shingles may be compactly and freely stacked upon each other with the flat bottom of each thereof bridging the adhesive coating in the recess in the upper surface of the underlying shingle.

2. The structure defined in claim 1, in which said shingle body is generally rectangular in shape, and in which said recess extends uninterruptedly from side to side therethrough.

3. The structure defined in claim 1, in which said adhesive coating has pressure sensitive characteristics.

4. In a flexible strip shingle of the asphalt composition type and including a head lap portion and an exposure portion and having flat generally parallel upper and lower surfaces, the improvement which comprises providing an upwardly opening elongated recess in the upper surface of said shingle strip which extends from end to end thereof generally along the medial line thereof so as to receive under the action of gravity the lower free edge of. the exposure portion of an adjacent shingle overlap- References Cited in the file of this patent UNITED STATES PATENTS 1,592,760 Fischer July 13, 1926 2,132,999 Topping Oct. 11, 1938 2,935,416 Dunbar et a1. May 3, 1960 FOREIGN PATENTS Canada Apr. 26, 1960 wa-c I