US 3080683 A
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Description (OCR text may contain errors)
March 12, 1963 s. H. SALLIE 7 3,080,683
SELF-SEALING SHIVNGLE Filed Oct. 22, 1957 United rates Patent @fiice 3,080,683- Paten'ted Mar. 12, 1963 3,080,683 SELF-SEALING SHINGLE Stanley H. Sallie, Mansfield, Mass, assignor to Bird &
Son, inez, East Walpole, Mass, a corporation of Massachusetts Filed Oct. 22, 1957, filer. No. 691,676 3 Ua'ims. (Cl. 50-103) This invention relates to shingles, and more particularly to such shingles in which an adhesive is used to seal down the shingle tabs raponsive to heat generated by the sun after the nailing down of the body portions of the shingles.
In order to achieve the desired sealing effect in situ, as on a roof, adhesive applied to shingles to produce automatic sealing-down of the tabs thereof must be very tacky at temperatures sufficiently low to insure rapid activation by the suns heat after the shingles are nailed down in position (nails being driven of course through upper portions of the shingles, not through the tabs, which must depend on activation of adhesive to be secured or sealed down). However, it is at the same time essential that the self-sealing adhesive not function to adhere separate shingles together while the same are stacked one on another and held together in bundles, as they are for shipping.
Avoiding this effect of sticking in the bundle has long been a major problem of the self-sealing shingle art. Many efforts have been made in the past to solve it, none of them heretofore being altogether satisfactory. Some patents have taught use of a layer of rupturable tissue, or a sheet of a water-soluble plastic atop the adhesive to prevent its sticking to an adjacent shingle in the package. Others have taught use of water-soluble powders over the adhesive. Still others have relied on mating bands of cooperative adhesive, which stick to each other but not to other surfaces. Others actually intentionally adhered adjacent panels together in the package, relying on the applicator to fracture the adhesive bond to expose an adhesive surface on each panel.
All the above expedients have drawbacks; either rain is a necessary prerequisite to ultimate sealing-down, or special packaging techniques are required, or the applicator must do extra work with often accompanying loose fragments of adhesives. No one of these expedients enables packing seal-down tab shingles in the same manner that earlier non-sealing shingles were packed, permitting packing and removal without extra work and trouble, while at the same time preventing adjacent shingles sticking together in the package.
It is a first object of this invention to provide such a self-sealing shingle, which may be packed in the normal manner, with for example two or three groups of shingles in a package, each group being transversely oppositely directed from an adjacent group thereabove or therebelow. It is a further object to permit the applicator to remove the shingles Without special work or attention. It is a still further object to prevent sticking in the package.
Generally speaking, my invention lies in providing a relationship between the elements permitting realization of the above objects. I place a longitudinal row of adhesive, preferably deposited in spots, above the butt portion and on the top surface of each shingle, the adhesive preferably having a surface higher than the surface of the butt portion. On the reverse (or bottom) face of each shingle I place a layer of antistick material of width sufficient to cover the faces of the adhesive, of an underlying or adjacent shingle in a. package, whether or not said underlying shingles are reversely transversely oriented.
Other objects, advantages and features will appear from the following description, taken together with the attached drawings, in which:
FIG. 1 is an isometric view of a portion of a bundle of shingles according to the invention;
FIG. 2 is a plan view of a preferred embodiment of the invention;
FIG. 3 is a sectional view through FIG. 2 at 3-3 thereof;
FIG. 4 is a plan view of a portion of a roof laid with the said shingles; and
FIG. 5 is a sectional view through FIG. 4 at 55 thereof.
Referring now to the drawings, there is shown a thick butt shingle indicated generally at 10 and including a body portion 12 and three butt portions 14. The butt portions 14 are thicker than the body portion 12, in the manner familiar to the art, being characterized by an extra layer of asphalt and granules over said butt portions.
Extending longitudinally along the upper face of the body portion 12 of each shingle, and adjacent to the butt portions thereof, is a row of spots 20 of seal-down adhesive material. Each spot may suitably be of onehalf to one inch in diameter, and the spots are spaced so that they will not in use merge together to prevent free escape of Water vapor from beneath shingles.
A satisfactory adhesive material may be blended according to the following formula (by weight):
140 cracking coil tar (Enjay) 89 High melting point wax (Sunoco #5512) 11 Each spot 20 is of thickness such that its face 22 lies in a higher plane than the face 24 of the butt portion of the shingle, in order to insure good contact for good cementing, in this preferred embodiment.
Extending centrally along the lower face of the shingle 10 is a band 30 comprising a layer of antistick material, which may suitably be prepared by diluting with four parts water each part of Differentiated Latex Lube, Type GR, 67% solids content, as sold by Dubois Co., to form a solution which may be coated onto the shingle to form the aforementioned antistick band 30. Another suitable liquid for laying down an antistick coating band has the following composition:
Percent Dow 22 silicone 2.5 Acetic acid, glacial 0.5 Dow XEYZI catalyst 0.5
It is the practice, especially with thick butt shingles, to make up each package with two or more groups of shingles, the shingles of each group being in alignment (i.e., the butt portions of one shingle lying against the corresponding butt portions of the adjacent shingle in the group), but each group being transversely reversely oriented with respect to any adjacent group. Thus in FIG. 1 is shown a group 40 and the lowest shingle 42 of an adjacent group thereabove.
The antistick strip 30 is made of width such that it covers the adhesive spots 20 of the shingle therebelow whether the latter is of the same shingle group or not; i.e., whether or not said lower adjacent shingle is transversely reversely oriented with respect to the shingle bearing antistick band.
When the shingles 10 are nailed onto a roof for example, in the usual manner, by means of nails 50, the lower parts of the butt Portions 14 fall over the adhesive spots 20 of underlying shingles 10, and in due course are cemented down thereto, by action of the suns warmth on the adhesive spots 20. The antistick strips 30 are of course safely out of contact with the spots 20' when the shingles are applied, as shown in FIG. 4.
It will thus be seen that I have provided the art with a new seal-down shingle which can be packaged, and removed from the package by the applicator in the normal manner, but which nevertheless is safe against sticking in the package no matter which way a shingle is oriented transversely with respect to the shingle therebelow.
I claim: 1. In a bundle of shingles the combination comprising a plurality of stacks of shingles, said stacks being formed of a multiplicity of identical shingles in overlying face to back relation, each of said shingles comprising a longitudinally extending body portion having generally parallel longitudinal edges with, in a stack direction, an upper face surface and a lower back surface, a multiplicity of butt portions integral with said body portion and extending transversely from said body portion, longitudinally extending adhesive having transverse extremities adherent to said body portion on said face surfaces, both said transverse extremities being on the same side of the longitudinal centerline of each of said shingles, and a centrally longitudinally extending layer of antistick material having transverse extremities adherent to said body portion on said back surfaces, the transverse extremities of said adhesive being respectively a first transverse distance from the nearer thereto longitudinal edge of the shingle and a second transverse distance from the other longitudinal edge of said shingle, the transverse extremities of said layer of antistick material being respectively a third transverse distance from the nearer thereto longitudinal edge of the shingle and a fourth transverse distance from the other longitudinal edge of said shingle, said first transverse distance being diiferent from said second transverse distance, and each of said third and fourth transverse distances being no greater than the smaller of said first and second transverse distances, each of said shingles having its adhesive on the same surface, all of said shingles of a stack having butt portions extending in the same transverse direction, the butt portions of all of said shingles of a stack extending in one transverse direction and the butt portions of all of said shingles of another stack extending in the opposite transverse direction, and said layer of antistick material of a said shingle contacting said adhesive of an adjoining said shingle therebelow in said stack, whereby shingles of a stack may be expeditiously applied on a roof, and stress on said adhesive in a bundle is reduced. 2. The combination of claim 1 in which said butt portions are thicker than said body portion.
3. The combination of claim 2 in which said adhesive is of thickness greater than the difference in thickness between said butt portions and said body portion.
References Cited in the file of this patent UNITED STATES PATENTS 1,063,710 McKay June 3, 1913 2,170,147 Lane Aug. 22, 1939 2,210,209 Kirschbraun Aug. 6, 1940 2,300,488 Cuno Nov. 3, 1942 2,667,131 Clarvoe et al Jan. 26, 1954 2,822,085 Bettoli ct a1. Feb. 4,1958 2,863,405 Leibrook et a1. Dec. 9, 1958 2,935,416 Dunbar May 3, 1960