US20060213143A1 - Shingles and methods of producing shingles - Google Patents
Shingles and methods of producing shingles Download PDFInfo
- Publication number
- US20060213143A1 US20060213143A1 US11/088,450 US8845005A US2006213143A1 US 20060213143 A1 US20060213143 A1 US 20060213143A1 US 8845005 A US8845005 A US 8845005A US 2006213143 A1 US2006213143 A1 US 2006213143A1
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- United States
- Prior art keywords
- drum
- shingle
- shingles
- strip
- fastening member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/60—Riveting or staking
- B29C65/601—Riveting or staking using extra riveting elements, i.e. the rivets being non-integral with the parts to be joined
- B29C65/605—Riveting or staking using extra riveting elements, i.e. the rivets being non-integral with the parts to be joined the rivets being molded in place, e.g. by injection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/40—Applying molten plastics, e.g. hot melt
- B29C65/42—Applying molten plastics, e.g. hot melt between pre-assembled parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/03—After-treatments in the joint area
- B29C66/032—Mechanical after-treatments
- B29C66/0324—Reforming or reshaping the joint, e.g. folding over
- B29C66/03241—Flattening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
- B29C66/326—Shaping the burr, e.g. by the joining tool
- B29C66/3262—Shaping the burr, e.g. by the joining tool as after-treatment, e.g. by a separate tool
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/45—Joining of substantially the whole surface of the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
- B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
- E04D1/26—Strip-shaped roofing elements simulating a repetitive pattern, e.g. appearing as a row of shingles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0045—Perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
- B29L2031/108—Roofs
Definitions
- the present invention relates to devices for covering rooftops, and to methods of producing such devices.
- FIGS. 1 and 2 illustrate one type of roofing shingle 20 that is commonly used today.
- the shingle 20 includes a first portion 22 (commonly referred to in the industry as a “tab”) and a second portion 24 (commonly referred to in the industry as a “dragon's tooth” or “tooth”).
- the first portion 22 is substantially rectangular, and forms a lower layer of the shingle 20 .
- the second portion 24 is shaped substantially as a rectangle having a plurality of cutouts 26 ( FIG. 1 ) along a lower edge 28 thereof.
- the cutouts 26 define a plurality of flaps 30 located between adjacent cutouts 26 .
- the flaps 30 and cutouts 26 are of approximately equal width, and each is shaped substantially as a trapezoid, with the flaps 30 being widest along their lower edges 28 .
- Trapezoidally shaped segments 34 of the first portion 22 are visible through the cutouts 26 , with the flaps 30 covering the first portion 22 between adjacent cutouts 26 .
- the tab 22 and tooth 24 define a rectangular region 36 ( FIG. 2 ) in which the tooth 24 completely overlaps the tab 22 .
- Each of the portions 22 , 24 may comprise, for example, a fiberglass membrane that is coated with asphalt tar and sprinkled with sand.
- adhesive (not shown) is applied to a back surface of the tooth 24 and/or to a front surface of the tab 22 .
- the adhesive is applied over the asphalt tar and sand.
- the tooth 24 is positioned over the tab 22 such that the lower edge 32 of the tab 22 aligns with the lower edge 28 of the tooth 24 , as shown in FIG. 2 .
- the adhesive which is commonly an asphalt-based glue such as SBS rubber, secures the tooth 24 and tab 22 to one another.
- the adhesive may be applied in the overlapping rectangular region 36 , as well as in the areas where the flaps 30 overlap the tab 22 .
- two-piece shingles Because they provide a pleasing appearance that is similar to wood shingles.
- one problem common to two-piece shingles is separation of the tooth 24 from the tab 22 . Such separation is most common in geographic areas that have warmer climates. The warmer temperatures cause the asphalt tar to become soft, thereby enabling the tab 22 to slide downward away from the tooth 24 under the influence of gravity on a slanted roof. Even when relatively strong adhesives are used to secure the tooth 24 and tab 22 to one another, softening of the asphalt tar still may allow for separation, because the adhesive only secures the sand on the tooth 24 to the sand on the tab 22 .
- softening of the asphalt tar enables the sand to separate from the fiberglass membranes of the tooth 24 and tab 22 .
- This separation can occur regardless of how strong the adhesive is. When such separation occurs, it can lead to shingle failure and a leaky roof.
- Fastening members such as nails and staples
- the fastening members are most commonly used to secure shingles to roof surfaces.
- the fastening members are preferably driven through the overlapping region 36 of each shingle 20 .
- the fastening members thus reinforce the adhesive and restrain separation of the tooth 24 from the tab 22 .
- laborers who install shingles frequently fail to drive the fastening members through the overlapping region 36 of each shingle 20 .
- These laborers are sometimes low-skilled and/or under time pressure to complete a job. They may drive the fastening members through the tooth 24 only. Thus, the fastening members do not penetrate the tab 22 .
- the tab 22 can disadvantageously slide down the roof away from the tooth 24 , leading to roof failure. Accordingly, many two-piece shingles that are produced today do not last as long as their manufacturers and consumers would like. A two-piece shingle that is better able to restrain separation of the tab from the tooth, even in very warm climates, would be of substantial benefit to shingle manufacturers, homeowners and other consumers of roofing shingles.
- the preferred embodiments of the present shingles and methods of producing shingles have several features, no single one of which is solely responsible for their desirable attributes. Without limiting the scope of these shingles and methods as expressed by the claims that follow, their more prominent features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled “Detailed Description of the Preferred Embodiments,” one will understand how the features of the preferred embodiments provide advantages, which include a very high resistance to separation of the tab and tooth portions of the shingle, and an ability to manufacture shingles at very high line speeds.
- One embodiment of the present shingles and methods of producing shingles comprises a shingle adapted to be secured to a rooftop to prevent moisture from penetrating the rooftop.
- the shingle comprises a first relatively larger portion, and a second relatively smaller portion partially overlapping the first portion, thereby defining an overlapping region.
- At least one aperture extends through both portions in the overlapping region, and a fastening member extends through the at least one aperture.
- the apparatus comprises a strip of shingles, a first drum including puncturing apparatus and a second drum including injecting apparatus.
- the second drum is spaced from the first drum and positioned such that longitudinal axes of the drums are substantially parallel.
- the drums are adapted to receive the strip along outer surfaces thereof.
- Another embodiment of the present shingles and methods of producing shingles comprises a method of producing shingles.
- the method comprises the step of providing at least one shingle having a tab portion, a tooth portion and an overlapping region in which the tab portion and tooth portion overlap.
- the method comprises the steps of puncturing at least one shingle in the overlapping region to thereby produce an aperture, and inserting a fastening member into the aperture to thereby secure the tab portion to the tooth portion.
- the apparatus comprises a strip of shingles, an outer drum, a first drum and a second drum.
- the first drum includes puncturing apparatus, and the second drum includes injecting apparatus.
- the second drum is spaced from the first drum and positioned such that longitudinal axes of the drums are substantially parallel.
- the outer drum is adapted to contact the strip along an outer surface thereof.
- the first drum is adapted to puncture the strip as it passes by the outer drum.
- the second drum is adapted to inject a fastening member into the strip as it passes by the outer drum.
- FIG. 1 is a top perspective, exploded view of a prior art shingle
- FIG. 2 is a top perspective view of the shingle of FIG. 1 ;
- FIG. 3 is a top perspective, exploded view of one embodiment of the present shingles
- FIG. 4 is a top perspective view of the shingle of FIG. 3 ;
- FIG. 5 is a cross-sectional view of the shingle of FIG. 4 , taken along the line 5 - 5 ;
- FIG. 6 is a side elevational view of one embodiment of apparatus for producing the shingle of FIG. 3 ;
- FIG. 7 is a detail side elevational view of a strip of shingles that are arranged end-to-end, taken along the line 7 - 7 in FIG. 6 ;
- FIG. 8 is a detail view of the apparatus of FIG. 6 , taken along the line 8 - 8 ;
- FIG. 9 is a detail side elevational view of the apparatus of FIG. 6 , taken along the line 9 - 9 ;
- FIG. 10 is a detail side elevational view of the apparatus of FIG. 6 , taken along the line 10 - 10 ;
- FIG. 11 is a detail side elevational view of the apparatus of FIG. 6 , taken along the line 11 - 11 ;
- FIG. 12 is a detail side elevational view of the apparatus of FIG. 6 , taken along the line 12 - 12 ;
- FIG. 13 is a side elevational view of another embodiment of apparatus for producing the shingle of FIG. 3 ;
- FIG. 14 is a detail side elevational view of an alternative embodiment of apparatus for performing puncturing and injecting steps.
- FIGS. 3-5 illustrate one embodiment of the present shingles 40 .
- the present shingle 40 includes a first portion 42 (a “tab”) and a second portion 44 (a “tooth”).
- the first portion 42 is substantially rectangular, and forms a lower layer of the shingle 40 .
- the second portion 44 is shaped substantially as a rectangle having a plurality of cutouts 46 ( FIG. 3 ) along a lower edge 48 thereof.
- the cutouts 46 define a plurality of flaps 50 located between adjacent cutouts 46 .
- the flaps 50 and cutouts 46 are of approximately equal width, and each is shaped substantially as a trapezoid, with the flaps 50 being widest along their lower edges 48 .
- the cutouts 46 and flaps 50 need not be of approximately equal size, and that either or both could be shaped differently from a trapezoid.
- approximately the lower half of the second portion 44 overlaps the first portion 42 , such that a lower edge 52 ( FIG. 3 ) of the first portion 42 aligns with the lower edge 48 ( FIG. 3 ) of the second portion 44 , as illustrated in FIG. 4 .
- Trapezoidally shaped segments 54 of the first portion 42 are visible through the cutouts 46 , with the flaps 50 covering the first portion 42 between adjacent cutouts 46 .
- the shape of the segments 54 is dependent upon the shape of the cutouts 46 , and need not be trapezoidal.
- the cutouts 46 and segments 54 could, for example, be rectangular or any other shape.
- the tab 42 and tooth 44 define a rectangular region 56 ( FIG. 4 ) in which the tooth 44 completely overlaps the tab 42 .
- the figures herein illustrate only a segment of the width of the shingle 40 .
- Side edges of the shingle 40 are represented by wavy lines that indicate that the shingle 40 may extend beyond the wavy lines.
- side edges of the shingle 40 are substantially straight.
- the shingle 40 has a width that is substantially greater than its height. For example, in one embodiment the shingle 40 may measure approximately twelve inches by approximately thirty-nine inches.
- Each of the first and second portions 42 , 44 may comprise, for example, a membrane that is coated with a sticky substance and sprinkled with a particulate material.
- the sticky substance and particulate material coat at least a substantial portion of a front surface of each membrane.
- the membrane may comprise fiberglass, the sticky substance may comprise asphalt tar, and the particulate material may comprise sand.
- the tooth 44 and the tab 42 each include at least one aperture 58 .
- the aperture(s) 58 on the tooth 44 align with the aperture(s) 58 on the tab 42 , and each receives a fastening member 60 that secures the tooth 44 and tab 42 to one another.
- the fastening member 60 comprises a rivet 60 .
- the fastening member 60 could embody alternative shapes that may or may not resemble a rivet.
- the rivet 60 includes a central shaft portion 62 and spaced end cap portions 64 .
- the shaft portion 62 is substantially conical, and matches the cross-sectional shape of the aperture 58 .
- the end cap portions 64 are substantially disk-shaped.
- the conical shape of the aperture 58 and shaft portion 62 , and the disk shape of the end cap portions 64 is a result of the manufacturing process, which is described in more detail below.
- Those of skill in the art will appreciate that alternative manufacturing methods may produce apertures, shaft portions and end cap portions having different shapes.
- the number of apertures 58 and rivets 60 in a single shingle 40 , and the spacing therebetween, can vary widely depending upon the intended application of that shingle 40 .
- each end cap portion 64 is greater than the diameter of the aperture 58 at either end thereof. Inner surfaces 66 of each end cap portion 64 abut outward facing surfaces 68 of the tooth 44 and tab 42 . Interengagement of the end cap portions 64 and the outward facing surfaces 68 inhibits separation of the tooth 44 and tab 42 from one another.
- the rivet 60 is constructed of a plastic, a nylon, a polyester or a polymer material. Those of skill in the art will appreciate that other materials could be used instead. However, the selected material is preferably compatible with the manufacturing environment and with the environment in which the rivet 60 will ultimately be deployed (such as atop a roof). Thus, factors such as the ambient temperature, the composition of the surrounding medium and any adjacent shingle materials, the presence of certain solvents and production speeds may be considered. Examples of other possible materials for the rivet 60 include polypropylene, metals (such as aluminum), metal alloys, other alloys, fiberglass or injectable adhesives.
- FIG. 6 illustrates one embodiment of apparatus 70 and methods for producing the present shingles 40 .
- the apparatus 70 may be self contained, or it may be just one aspect of a larger apparatus (not shown) for producing shingles 40 .
- a continuous strip 72 of shingles 40 enters the apparatus 70 .
- the strip 72 may comprise shingles 40 that are oriented top-to-bottom.
- the strip 72 may comprise shingles 40 that are oriented end-to-end, as illustrated in FIG. 7 .
- the shingles 40 are configured such that from left to right the viewer sees one continuous tooth 44 layered upon one continuous tab 42 .
- the width of the strip 72 (measured into the plane of the FIG. 7 ) may correspond to the height of a single shingle 40 .
- the width of the strip 72 may include multiple uncut shingle strips 72 that are positioned next to one another along an axis that extends perpendicular to the plane of the paper. In such wider configurations, the strip 72 may be cut longitudinally at a later step of the process to form several thinner strips 72 of shingles 40 .
- the width of the strip 72 may include multiple independent shingle strips 72 that are positioned next to one another along an axis that extends perpendicular to the plane of the paper.
- the strip 72 may pass over or under several rollers 74 , or through several pairs of rollers 74 .
- Some of these rollers 74 may be driven, and some may be passive. Some of them may be pinch rollers 74 that provide locomotive force to drive the strip 72 through the apparatus 70 .
- the pinch rollers 74 may be pairs of driven rollers 74 that squeeze the strip 72 from opposite surfaces. As the rollers 74 spin, they pull the strip 72 through a gap located in between the rollers 74 .
- guides may direct the strip 72 so that it follows a desired path.
- the guides may be positioned to either side of the strip 72 to push it left or right (that is, into our out of the plane of the paper in FIG. 6 ).
- the guides may be positioned in a trough (not shown) that traces the path of the strip 72 through the larger apparatus and/or the apparatus 70 .
- the guides may include ceramic surfaces that are highly resistant to wear that may be caused by the passing shingle strip 72 .
- the guides may desirably create a small amount of friction with the strip 72 , so as not to slow the strip 72 as it passes through the larger apparatus and/or the apparatus 70 .
- the strip 72 may pass through two pairs of rollers 74 before being fed onto, and passing over the top of, a first drum 76 , or puncturing drum 76 .
- the shingle strip 72 may pass underneath the drum 76 . Guides (not shown) may ensure that the strip 72 is positioned correctly along a longitudinal axis of the drum 76 .
- the first drum 76 includes a plurality of puncturing apparatus 78 ( FIG. 8 ).
- the puncturing apparatus 78 are evenly spaced around the circumference of the drum 76 .
- the puncturing apparatus 78 are thus adapted to puncture the strip 72 at evenly spaced intervals along the length of the strip 72 .
- the interval may measure anywhere from 3 inches to 18 inches.
- those of skill in the art will appreciate that other intervals are also feasible, and the intervals stated above are not limiting.
- the drum 76 may also include puncturing apparatus 78 that are evenly spaced from one another in the direction of a longitudinal axis of the drum 76 .
- the puncturing apparatus 78 are thus adapted to puncture the strip 72 , or multiple strips 72 , at evenly spaced intervals across the width of the drum 76 .
- Such a drum would allow multiple strips 72 positioned side-by-side to travel over the drum 76 and be punctured at the same time.
- the puncturing apparatus 78 comprises a plurality of spikes 78 , as illustrated in FIG. 8 .
- the spikes 78 are substantially conically shaped.
- the spikes 78 may be constructed of a relatively hard and tough material, for example, diamond, carbide, steel, ferrous or nonferrous alloys or ceramics.
- the puncturing apparatus 78 may comprise, for example, a water jet, an air jet, a laser cutter, or any other type of apparatus that is capable of puncturing, piercing or otherwise creating a hole in a shingle 40 .
- each overlapping region 56 includes one or more apertures 58 that pass through both the tooth 44 and the tab 42 of each shingle 40 .
- the strip 72 may pass under one or more additional rollers 74 , as shown in FIG. 6 .
- the rollers 74 may help to maintain tension in the strip 72 .
- the strip 72 may then be fed onto, and pass over the top of, a second drum 80 , or injecting drum 80 .
- the shingle strip 72 may pass underneath the drum 80 .
- the second drum 80 is substantially the same diameter as the first drum 76 .
- each drum 76 , 80 may have a diameter of 6 feet.
- the drums 76 , 80 could have different diameters.
- the drums 76 , 80 may also have substantially equal widths (measured perpendicular to the plane of FIG. 6 ).
- each drum 76 , 80 may have a width of about twelve inches.
- the drums 76 , 80 could have different widths.
- the second drum 80 includes a plurality of injecting apparatus 82 , as illustrated in FIG. 10 .
- the injecting apparatus 82 are evenly spaced around the circumference of the drum 80 .
- the injecting apparatus 82 are thus adapted to inject rivets 60 into the strip 72 at evenly spaced intervals along the length of the strip 72 .
- the spacing may be the same as that described above with respect to the first drum 76 .
- the second drum 80 may also include injecting apparatus 82 that are evenly spaced from one another in the direction of a longitudinal axis of the drum 80 .
- the injecting apparatus 82 are thus adapted to inject rivets 60 into the strip 72 , or multiple strips 72 , at evenly spaced intervals along the width of the drum 80 .
- Such a drum would allow multiple strips 72 positioned side-by-side to travel over the drum 80 and be injected at the same time.
- the injecting apparatus 82 comprises a plurality of injection nozzles 84 , as illustrated in FIG. 10 .
- FIG. 10 illustrates the configuration of the shingle strip 72 that is illustrated in FIG. 7 .
- the injection nozzles 84 may be, for example, pneumatically operated.
- the injection nozzles 84 are positioned such that they abut an inside surface 86 of the drum 80 . Holes (not shown) are preferably provided in the outer surface of the drum 80 at the location of each injection nozzle 84 .
- a fluid conduit 88 extends from each nozzle 84 to a central hub 90 .
- Liquefied rivet material flows through the central hub 90 , into the fluid conduits 88 and is expelled through the injection nozzles 84 and into the apertures 58 in the strip 72 .
- the rivet material may begin as a solid that is placed in an extruder (not shown), melted and pumped through a melt pump (not shown) to the central hub 90 . Pressure may be used to push the rivet material through any piping/conduits between the extruder and the injection nozzles 84 .
- One or more photoelectric sensors may be used to control the opening and closing of the injection nozzles 84 .
- a circumferential spacing of the injection nozzles 84 is preferably equal to a circumferential spacing of the puncturing apparatus 78 (though the drums 76 , 80 need not have equal diameters).
- the second drum 80 is also preferably positioned such that a distance between the drums 76 , 80 as measured along the path of travel of the strip 72 is a multiple of the circumferential spacing of the puncturing apparatus 78 . Then, tension in the strip 72 ensures that the strip 72 always aligns properly with the second drum 80 so that the rivets 60 are injected into the apertures 58 .
- a timing belt may ensure that the drums 76 , 80 rotate in synchronicity with one another, or with other components of the apparatus, as desired.
- the strip 72 After passing over the second drum 80 ( FIG. 6 ), the strip 72 passes through a pair of pinch rollers 74 .
- the rivet 60 prior to passing through the pinch rollers 74 the rivet 60 has a first end 94 shaped substantially as an arcuate dome with a relatively large diameter, and a second end 96 shaped substantially as a ball with a relatively small diameter.
- the shape of the rivet ends 94 , 96 at this stage is a result of the injection process.
- the end nearest the nozzle 84 during injection forms the dome shape, and the opposite end forms the ball shape.
- the lower portions of shingles 40 in a first row overlap the upper portions of the shingles 40 in a second, adjacent, row.
- the shingles 40 in the first row may overlap the portions of a shingles 40 in the second row where the rivets 60 are located. Therefore, to provide a more functional and aesthetically pleasing roof, it is advantageous to flatten the ends 94 , 96 of the rivets 60 as much as possible so that they do not cause the overlapping adjacent shingles 40 to protrude upwardly.
- the rivet 60 material is still soft enough to easily undergo plastic deformation.
- the rollers 74 thus flatten the rivet ends 94 , 96 into the configurations shown in FIG. 12 .
- the manufacturing steps described above are advantageously capable of being integrated into a larger manufacturing process in which the production line is moving very quickly.
- the steps of puncturing and riveting are performed on relatively large drums 76 , 80 that rotate at an angular velocity that is proportional to the linear velocity of the shingle strip 72 .
- the apparatus that is performing those functions remains fixed relative to the shingle strip 72 , providing a relatively large amount of time to perform these steps.
- the rivets 60 of the present shingles 40 advantageously extend through the membranes of the tooth 44 and tab 42 , thereby locking these components together. Separation of the shingle components thus depends solely upon the rivets 60 , rather than upon the asphalt tar, which has a relatively low melting temperature. Testing conducted by the inventor has shown the durability of the present shingles 40 and the ability of the rivets 60 to hold the tooth 44 and tab 42 together. In one test, one of the present shingles 40 was suspended from its tooth 44 , such that the tab 42 hung freely and would have separated from the tooth 44 had it not been for the rivet 60 holding the two portions together.
- the shingle 40 was then placed in an oven set at about 120° F. The temperature was increased about 10° F. every hour until the tab 42 separated from the tooth 44 and dropped off. The goal was to see if the rivet 60 could hold the two portions together up to a temperature of about 220° F. When the oven temperature reached about 315° F., the test was stopped. The rivet 60 still firmly held the tooth 44 and tab 42 together. By contrast, a prior art shingle 20 with no rivet 60 subjected to the same test failed at about 160° F.
- the fastening member may be driven only through the tooth 24 or the tab 42 without affecting the expected lifespan of the shingle 40 .
- the rivets 60 alone securely hold the tooth 44 and the tab 42 together without the need for any additional fastening members.
- FIG. 13 illustrates another embodiment of apparatus 100 and methods for producing the present shingles 40 .
- the apparatus 100 may be self contained, or it may be just one aspect of a larger apparatus (not shown) for producing shingles 40 .
- a continuous strip 72 of shingles 40 enters the apparatus.
- the strip 72 may pass through a pair of rollers 74 before being fed onto, and passing over the top of, an outer drum 102 .
- the strip 72 may pass through another pair of rollers 74 .
- Guides (not shown) may ensure that the strip 72 is positioned correctly along a longitudinal axis of the drum 102 .
- First and second drums 104 , 106 are positioned within the outer drum 102 .
- the first drum 104 is positioned at approximately 3 o'clock on the outer drum 102
- the second drum 106 is positioned at approximately 12 o'clock on the outer drum 102 .
- the first and second drums 104 , 106 could be positioned at other locations within the outer drum 102
- the first and second drums 104 , 106 could be positioned outside the outer drum 102 .
- the first drum 104 includes puncturing apparatus (not shown), and is similar in configuration to the first drum 76 described above.
- the second drum 106 includes injecting apparatus (not shown), and is similar in configuration to the second drum 80 described above.
- Outer surfaces 108 , 110 of the first and second drums 104 , 106 may abut an inner surface 112 of the outer drum 102 .
- the drums 102 , 104 , 106 preferably rotate at appropriate angular velocities so that as the drums 102 , 104 , 106 all rotate the outer surfaces 108 , 110 of the first and second drums 104 , 106 do not slip with respect to the inner surface 112 of the outer drum 102 .
- the outer drum 102 includes a plurality of holes (not shown) in its surface. In one embodiment, the holes are evenly spaced around the circumference of the drum 102 . The holes align with the puncturing apparatus and the injecting apparatus on the first and second drums 104 , 106 , respectively, as the drums 102 , 104 , 106 rotate. Thus, the puncturing and injecting steps described above with respect to the apparatus 70 and methods illustrated in FIG. 6 take place at the surface of the outer drum 102 as the strip 72 passes over the drum 102 .
- FIG. 14 illustrates an alternative embodiment of apparatus 120 for performing puncturing and injecting steps.
- the puncturing and injecting tools comprise a single apparatus 120 .
- the apparatus 120 includes an injection nozzle 122 .
- a lumen 124 of the injection nozzle 122 houses a puncturing tool 126 that is selectively retractable.
- the apparatus 120 may be positioned on the inside of a drum 128 , similarly to the injecting apparatus 82 described above. As the strip 72 passes over the drum 128 , the puncturing tool 126 punctures the strip 72 to produce a hole 130 , and the injection nozzle subsequently injects liquefied rivet 132 material into the hole 130 .
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
The present specification describes shingles having first and second discrete portions. A fastening member, such as a rivet, secures the first and second portions to one another. The rivet resists separation of the portions over time after the shingles have been installed on a rooftop. The present specification also describes methods of producing shingles having at least one fastening member to secure first and second shingle portions to one another. In one method, apparatus is provided to puncture a continuous strip of shingles at regular intervals, and then insert a fastening member into the apertures created during the puncturing step. The puncturing and injecting apparatus described includes drums, which the shingle strip may pass over or under.
Description
- 1. Field of the Invention
- The present invention relates to devices for covering rooftops, and to methods of producing such devices.
- 2. Description of the Related Art
-
FIGS. 1 and 2 illustrate one type ofroofing shingle 20 that is commonly used today. Theshingle 20 includes a first portion 22 (commonly referred to in the industry as a “tab”) and a second portion 24 (commonly referred to in the industry as a “dragon's tooth” or “tooth”). Thefirst portion 22 is substantially rectangular, and forms a lower layer of theshingle 20. Thesecond portion 24 is shaped substantially as a rectangle having a plurality of cutouts 26 (FIG. 1 ) along alower edge 28 thereof. Thecutouts 26 define a plurality offlaps 30 located betweenadjacent cutouts 26. Theflaps 30 andcutouts 26 are of approximately equal width, and each is shaped substantially as a trapezoid, with theflaps 30 being widest along theirlower edges 28. Approximately the lower half of thesecond portion 24 overlaps thefirst portion 22, such that the lower edge 28 (FIG. 1 ) of thesecond portion 24 aligns with a lower edge 32 (FIG. 1 ) of thefirst portion 22, as shown inFIG. 2 . Trapezoidally shapedsegments 34 of thefirst portion 22 are visible through thecutouts 26, with theflaps 30 covering thefirst portion 22 betweenadjacent cutouts 26. Above thecutouts 26, thetab 22 andtooth 24 define a rectangular region 36 (FIG. 2 ) in which thetooth 24 completely overlaps thetab 22. - Each of the
portions tooth 24 and/or to a front surface of thetab 22. The adhesive is applied over the asphalt tar and sand. Thetooth 24 is positioned over thetab 22 such that thelower edge 32 of thetab 22 aligns with thelower edge 28 of thetooth 24, as shown inFIG. 2 . The adhesive, which is commonly an asphalt-based glue such as SBS rubber, secures thetooth 24 andtab 22 to one another. The adhesive may be applied in the overlappingrectangular region 36, as well as in the areas where theflaps 30 overlap thetab 22. - Many consumers prefer two-piece shingles, because they provide a pleasing appearance that is similar to wood shingles. However, one problem common to two-piece shingles is separation of the
tooth 24 from thetab 22. Such separation is most common in geographic areas that have warmer climates. The warmer temperatures cause the asphalt tar to become soft, thereby enabling thetab 22 to slide downward away from thetooth 24 under the influence of gravity on a slanted roof. Even when relatively strong adhesives are used to secure thetooth 24 andtab 22 to one another, softening of the asphalt tar still may allow for separation, because the adhesive only secures the sand on thetooth 24 to the sand on thetab 22. Accordingly, softening of the asphalt tar enables the sand to separate from the fiberglass membranes of thetooth 24 andtab 22. This separation can occur regardless of how strong the adhesive is. When such separation occurs, it can lead to shingle failure and a leaky roof. - Fastening members, such as nails and staples, are most commonly used to secure shingles to roof surfaces. With two-piece shingles, such as those illustrated in
FIGS. 1 and 2 , the fastening members are preferably driven through theoverlapping region 36 of eachshingle 20. The fastening members thus reinforce the adhesive and restrain separation of thetooth 24 from thetab 22. Unfortunately, laborers who install shingles frequently fail to drive the fastening members through the overlappingregion 36 of eachshingle 20. These laborers are sometimes low-skilled and/or under time pressure to complete a job. They may drive the fastening members through thetooth 24 only. Thus, the fastening members do not penetrate thetab 22. As the asphalt tar softens, thetab 22 can disadvantageously slide down the roof away from thetooth 24, leading to roof failure. Accordingly, many two-piece shingles that are produced today do not last as long as their manufacturers and consumers would like. A two-piece shingle that is better able to restrain separation of the tab from the tooth, even in very warm climates, would be of substantial benefit to shingle manufacturers, homeowners and other consumers of roofing shingles. - The preferred embodiments of the present shingles and methods of producing shingles have several features, no single one of which is solely responsible for their desirable attributes. Without limiting the scope of these shingles and methods as expressed by the claims that follow, their more prominent features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled “Detailed Description of the Preferred Embodiments,” one will understand how the features of the preferred embodiments provide advantages, which include a very high resistance to separation of the tab and tooth portions of the shingle, and an ability to manufacture shingles at very high line speeds.
- One embodiment of the present shingles and methods of producing shingles comprises a shingle adapted to be secured to a rooftop to prevent moisture from penetrating the rooftop. The shingle comprises a first relatively larger portion, and a second relatively smaller portion partially overlapping the first portion, thereby defining an overlapping region. At least one aperture extends through both portions in the overlapping region, and a fastening member extends through the at least one aperture.
- Another embodiment of the present shingles and methods of producing shingles comprises apparatus for producing shingles. The apparatus comprises a strip of shingles, a first drum including puncturing apparatus and a second drum including injecting apparatus. The second drum is spaced from the first drum and positioned such that longitudinal axes of the drums are substantially parallel. The drums are adapted to receive the strip along outer surfaces thereof.
- Another embodiment of the present shingles and methods of producing shingles comprises a method of producing shingles. The method comprises the step of providing at least one shingle having a tab portion, a tooth portion and an overlapping region in which the tab portion and tooth portion overlap. The method comprises the steps of puncturing at least one shingle in the overlapping region to thereby produce an aperture, and inserting a fastening member into the aperture to thereby secure the tab portion to the tooth portion.
- Another embodiment of the present shingles and methods of producing shingles comprises apparatus for producing shingles. The apparatus comprises a strip of shingles, an outer drum, a first drum and a second drum. The first drum includes puncturing apparatus, and the second drum includes injecting apparatus. The second drum is spaced from the first drum and positioned such that longitudinal axes of the drums are substantially parallel. The outer drum is adapted to contact the strip along an outer surface thereof. The first drum is adapted to puncture the strip as it passes by the outer drum. The second drum is adapted to inject a fastening member into the strip as it passes by the outer drum.
- The preferred embodiments of the present shingles and methods of producing shingles, illustrating their features, will now be discussed in detail. These embodiments depict the novel and non-obvious shingles and methods shown in the accompanying drawings, which are for illustrative purposes only. These drawings include the following figures, in which like numerals indicate like parts:
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FIG. 1 is a top perspective, exploded view of a prior art shingle; -
FIG. 2 is a top perspective view of the shingle ofFIG. 1 ; -
FIG. 3 is a top perspective, exploded view of one embodiment of the present shingles; -
FIG. 4 is a top perspective view of the shingle ofFIG. 3 ; -
FIG. 5 is a cross-sectional view of the shingle ofFIG. 4 , taken along the line 5-5; -
FIG. 6 is a side elevational view of one embodiment of apparatus for producing the shingle ofFIG. 3 ; -
FIG. 7 is a detail side elevational view of a strip of shingles that are arranged end-to-end, taken along the line 7-7 inFIG. 6 ; -
FIG. 8 is a detail view of the apparatus ofFIG. 6 , taken along the line 8-8; -
FIG. 9 is a detail side elevational view of the apparatus ofFIG. 6 , taken along the line 9-9; -
FIG. 10 is a detail side elevational view of the apparatus ofFIG. 6 , taken along the line 10-10; -
FIG. 11 is a detail side elevational view of the apparatus ofFIG. 6 , taken along the line 11-11; -
FIG. 12 is a detail side elevational view of the apparatus ofFIG. 6 , taken along the line 12-12; -
FIG. 13 is a side elevational view of another embodiment of apparatus for producing the shingle ofFIG. 3 ; and -
FIG. 14 is a detail side elevational view of an alternative embodiment of apparatus for performing puncturing and injecting steps. -
FIGS. 3-5 illustrate one embodiment of thepresent shingles 40. Like theprior art shingle 20 above, thepresent shingle 40 includes a first portion 42 (a “tab”) and a second portion 44 (a “tooth”). In the illustrated embodiment, thefirst portion 42 is substantially rectangular, and forms a lower layer of theshingle 40. Thesecond portion 44 is shaped substantially as a rectangle having a plurality of cutouts 46 (FIG. 3 ) along alower edge 48 thereof. Thecutouts 46 define a plurality offlaps 50 located betweenadjacent cutouts 46. In the illustrated embodiment, theflaps 50 andcutouts 46 are of approximately equal width, and each is shaped substantially as a trapezoid, with theflaps 50 being widest along theirlower edges 48. Those of skill in the art will appreciate that thecutouts 46 and flaps 50 need not be of approximately equal size, and that either or both could be shaped differently from a trapezoid. - In the illustrated embodiment, approximately the lower half of the
second portion 44 overlaps thefirst portion 42, such that a lower edge 52 (FIG. 3 ) of thefirst portion 42 aligns with the lower edge 48 (FIG. 3 ) of thesecond portion 44, as illustrated inFIG. 4 . Trapezoidally shapedsegments 54 of thefirst portion 42 are visible through thecutouts 46, with theflaps 50 covering thefirst portion 42 betweenadjacent cutouts 46. The shape of thesegments 54 is dependent upon the shape of thecutouts 46, and need not be trapezoidal. Thecutouts 46 andsegments 54 could, for example, be rectangular or any other shape. Above thecutouts 46, thetab 42 andtooth 44 define a rectangular region 56 (FIG. 4 ) in which thetooth 44 completely overlaps thetab 42. - For clarity, the figures herein illustrate only a segment of the width of the
shingle 40. Side edges of theshingle 40 are represented by wavy lines that indicate that theshingle 40 may extend beyond the wavy lines. In one embodiment, side edges of theshingle 40 are substantially straight. In one embodiment, theshingle 40 has a width that is substantially greater than its height. For example, in one embodiment theshingle 40 may measure approximately twelve inches by approximately thirty-nine inches. - Each of the first and
second portions - With reference to
FIGS. 3 and 4 , in the rectangular overlappingregion 56 of each, thetooth 44 and thetab 42 each include at least oneaperture 58. The aperture(s) 58 on thetooth 44 align with the aperture(s) 58 on thetab 42, and each receives afastening member 60 that secures thetooth 44 andtab 42 to one another. In the illustrated embodiment, thefastening member 60 comprises arivet 60. However, those of skill in the art will appreciate that thefastening member 60 could embody alternative shapes that may or may not resemble a rivet. - With reference to
FIG. 5 , which illustrates a detailed cross-sectional view of onerivet 60 and itsrespective aperture 58, therivet 60 includes acentral shaft portion 62 and spacedend cap portions 64. In the illustrated embodiment, theshaft portion 62 is substantially conical, and matches the cross-sectional shape of theaperture 58. Also, in the illustrated embodiment, theend cap portions 64 are substantially disk-shaped. The conical shape of theaperture 58 andshaft portion 62, and the disk shape of theend cap portions 64 is a result of the manufacturing process, which is described in more detail below. Those of skill in the art will appreciate that alternative manufacturing methods may produce apertures, shaft portions and end cap portions having different shapes. Moreover, the number ofapertures 58 and rivets 60 in asingle shingle 40, and the spacing therebetween, can vary widely depending upon the intended application of thatshingle 40. - The diameter of each
end cap portion 64 is greater than the diameter of theaperture 58 at either end thereof.Inner surfaces 66 of eachend cap portion 64 abut outward facingsurfaces 68 of thetooth 44 andtab 42. Interengagement of theend cap portions 64 and the outward facing surfaces 68 inhibits separation of thetooth 44 andtab 42 from one another. - In the illustrated embodiment, the
rivet 60 is constructed of a plastic, a nylon, a polyester or a polymer material. Those of skill in the art will appreciate that other materials could be used instead. However, the selected material is preferably compatible with the manufacturing environment and with the environment in which therivet 60 will ultimately be deployed (such as atop a roof). Thus, factors such as the ambient temperature, the composition of the surrounding medium and any adjacent shingle materials, the presence of certain solvents and production speeds may be considered. Examples of other possible materials for therivet 60 include polypropylene, metals (such as aluminum), metal alloys, other alloys, fiberglass or injectable adhesives. -
FIG. 6 illustrates one embodiment ofapparatus 70 and methods for producing thepresent shingles 40. Theapparatus 70 may be self contained, or it may be just one aspect of a larger apparatus (not shown) for producingshingles 40. In either case, at the right-hand side ofFIG. 6 , acontinuous strip 72 ofshingles 40 enters theapparatus 70. In one embodiment, thestrip 72 may compriseshingles 40 that are oriented top-to-bottom. In another embodiment, thestrip 72 may compriseshingles 40 that are oriented end-to-end, as illustrated inFIG. 7 . In this embodiment, theshingles 40 are configured such that from left to right the viewer sees onecontinuous tooth 44 layered upon onecontinuous tab 42. Of course, if the viewer were positioned on the opposite side of the strip, he or she would see the evenly spaced gaps between the flaps 50 (FIG. 4 ). The thickness of thestrip 72 inFIG. 7 has been exaggerated for illustrative effect. Thestrip 72 is cut at a later step of the process to formindividual shingles 40. - In the configuration of
FIG. 7 , the width of the strip 72 (measured into the plane of theFIG. 7 ) may correspond to the height of asingle shingle 40. Alternatively, the width of thestrip 72 may include multiple uncut shingle strips 72 that are positioned next to one another along an axis that extends perpendicular to the plane of the paper. In such wider configurations, thestrip 72 may be cut longitudinally at a later step of the process to form severalthinner strips 72 ofshingles 40. Alternatively, the width of thestrip 72 may include multiple independent shingle strips 72 that are positioned next to one another along an axis that extends perpendicular to the plane of the paper. - With reference to
FIG. 6 , thestrip 72 may pass over or underseveral rollers 74, or through several pairs ofrollers 74. Some of theserollers 74 may be driven, and some may be passive. Some of them may bepinch rollers 74 that provide locomotive force to drive thestrip 72 through theapparatus 70. For example, thepinch rollers 74 may be pairs of drivenrollers 74 that squeeze thestrip 72 from opposite surfaces. As therollers 74 spin, they pull thestrip 72 through a gap located in between therollers 74. - As the
shingle strip 72 passes through the larger apparatus and/or theapparatus 70, at various stages guides (not shown) may direct thestrip 72 so that it follows a desired path. For example, the guides may be positioned to either side of thestrip 72 to push it left or right (that is, into our out of the plane of the paper inFIG. 6 ). The guides may be positioned in a trough (not shown) that traces the path of thestrip 72 through the larger apparatus and/or theapparatus 70. The guides may include ceramic surfaces that are highly resistant to wear that may be caused by the passingshingle strip 72. The guides may desirably create a small amount of friction with thestrip 72, so as not to slow thestrip 72 as it passes through the larger apparatus and/or theapparatus 70. - With further reference to
FIG. 6 , thestrip 72 may pass through two pairs ofrollers 74 before being fed onto, and passing over the top of, afirst drum 76, or puncturingdrum 76. In an alternative configuration for themanufacturing apparatus 70, theshingle strip 72 may pass underneath thedrum 76. Guides (not shown) may ensure that thestrip 72 is positioned correctly along a longitudinal axis of thedrum 76. - The
first drum 76 includes a plurality of puncturing apparatus 78 (FIG. 8 ). In one embodiment, the puncturingapparatus 78 are evenly spaced around the circumference of thedrum 76. The puncturingapparatus 78 are thus adapted to puncture thestrip 72 at evenly spaced intervals along the length of thestrip 72. In one embodiment, the interval may measure anywhere from 3 inches to 18 inches. However, those of skill in the art will appreciate that other intervals are also feasible, and the intervals stated above are not limiting. - The
drum 76 may also include puncturingapparatus 78 that are evenly spaced from one another in the direction of a longitudinal axis of thedrum 76. The puncturingapparatus 78 are thus adapted to puncture thestrip 72, ormultiple strips 72, at evenly spaced intervals across the width of thedrum 76. Such a drum would allowmultiple strips 72 positioned side-by-side to travel over thedrum 76 and be punctured at the same time. - In one embodiment, the puncturing
apparatus 78 comprises a plurality ofspikes 78, as illustrated inFIG. 8 . In the illustrated embodiment, thespikes 78 are substantially conically shaped. However, those of skill in the art will appreciate that thespikes 78 could have a variety of other shapes, such as cylindrical. Thespikes 78 may be constructed of a relatively hard and tough material, for example, diamond, carbide, steel, ferrous or nonferrous alloys or ceramics. In still further embodiments, the puncturingapparatus 78 may comprise, for example, a water jet, an air jet, a laser cutter, or any other type of apparatus that is capable of puncturing, piercing or otherwise creating a hole in ashingle 40. - In the configuration of
FIG. 7 , the circumferential spacing of the puncturingapparatus 78 is preferably set to whatever rivet spacing is desired. Theshingle strip 72 is preferably positioned so that the puncturingapparatus 78 punctures each overlappingregion 56 as shown inFIG. 8 .FIG. 9 illustrates a close-up view of each overlappingregion 56 after it has passed over thefirst drum 76 and been punctured. After the puncturing step, each overlappingregion 56 includes one ormore apertures 58 that pass through both thetooth 44 and thetab 42 of eachshingle 40. Those of skill in the art will appreciate that the orientation of thetooth 44 andtab 42 may be reversed. - After passing over the
first drum 76, thestrip 72 may pass under one or moreadditional rollers 74, as shown inFIG. 6 . Therollers 74 may help to maintain tension in thestrip 72. Thestrip 72 may then be fed onto, and pass over the top of, asecond drum 80, or injectingdrum 80. In an alternative configuration for themanufacturing apparatus 70, theshingle strip 72 may pass underneath thedrum 80. - In the illustrated embodiment, the
second drum 80 is substantially the same diameter as thefirst drum 76. For example, eachdrum drums drums FIG. 6 ). For example, eachdrum drums - The
second drum 80 includes a plurality of injectingapparatus 82, as illustrated inFIG. 10 . In one embodiment, the injectingapparatus 82 are evenly spaced around the circumference of thedrum 80. The injectingapparatus 82 are thus adapted to injectrivets 60 into thestrip 72 at evenly spaced intervals along the length of thestrip 72. The spacing may be the same as that described above with respect to thefirst drum 76. - The
second drum 80 may also include injectingapparatus 82 that are evenly spaced from one another in the direction of a longitudinal axis of thedrum 80. The injectingapparatus 82 are thus adapted to injectrivets 60 into thestrip 72, ormultiple strips 72, at evenly spaced intervals along the width of thedrum 80. Such a drum would allowmultiple strips 72 positioned side-by-side to travel over thedrum 80 and be injected at the same time. - In one embodiment, the injecting
apparatus 82 comprises a plurality ofinjection nozzles 84, as illustrated inFIG. 10 .FIG. 10 illustrates the configuration of theshingle strip 72 that is illustrated inFIG. 7 . The injection nozzles 84 may be, for example, pneumatically operated. In the illustrated embodiment, theinjection nozzles 84 are positioned such that they abut aninside surface 86 of thedrum 80. Holes (not shown) are preferably provided in the outer surface of thedrum 80 at the location of eachinjection nozzle 84. - A
fluid conduit 88 extends from eachnozzle 84 to acentral hub 90. Liquefied rivet material flows through thecentral hub 90, into thefluid conduits 88 and is expelled through theinjection nozzles 84 and into theapertures 58 in thestrip 72. In one embodiment, for example, the rivet material may begin as a solid that is placed in an extruder (not shown), melted and pumped through a melt pump (not shown) to thecentral hub 90. Pressure may be used to push the rivet material through any piping/conduits between the extruder and theinjection nozzles 84. One or more photoelectric sensors may be used to control the opening and closing of theinjection nozzles 84. - To properly align the
apertures 58 with theinjection nozzles 84, a circumferential spacing of theinjection nozzles 84 is preferably equal to a circumferential spacing of the puncturing apparatus 78 (though thedrums second drum 80 is also preferably positioned such that a distance between thedrums strip 72 is a multiple of the circumferential spacing of the puncturingapparatus 78. Then, tension in thestrip 72 ensures that thestrip 72 always aligns properly with thesecond drum 80 so that therivets 60 are injected into theapertures 58. A timing belt (not shown) may ensure that thedrums - After passing over the second drum 80 (
FIG. 6 ), thestrip 72 passes through a pair ofpinch rollers 74. With reference toFIGS. 11 and 12 , prior to passing through thepinch rollers 74 therivet 60 has afirst end 94 shaped substantially as an arcuate dome with a relatively large diameter, and asecond end 96 shaped substantially as a ball with a relatively small diameter. The shape of the rivet ends 94, 96 at this stage is a result of the injection process. The end nearest thenozzle 84 during injection forms the dome shape, and the opposite end forms the ball shape. - When the
shingles 40 are installed atop a roof, the lower portions ofshingles 40 in a first row overlap the upper portions of theshingles 40 in a second, adjacent, row. Theshingles 40 in the first row may overlap the portions of ashingles 40 in the second row where therivets 60 are located. Therefore, to provide a more functional and aesthetically pleasing roof, it is advantageous to flatten theends rivets 60 as much as possible so that they do not cause the overlappingadjacent shingles 40 to protrude upwardly. - When the
rivets 60 pass through the pinch rollers 74 (FIG. 11 ), therivet 60 material is still soft enough to easily undergo plastic deformation. Therollers 74 thus flatten the rivet ends 94, 96 into the configurations shown inFIG. 12 . - The manufacturing steps described above are advantageously capable of being integrated into a larger manufacturing process in which the production line is moving very quickly. In the illustrated embodiment, the steps of puncturing and riveting are performed on relatively
large drums shingle strip 72. Thus, while the steps of puncturing and riveting are performed, the apparatus that is performing those functions remains fixed relative to theshingle strip 72, providing a relatively large amount of time to perform these steps. - Whereas
prior art shingles 20 glue the sand on thetooth 24 to the sand on thetab 22, as described above, therivets 60 of thepresent shingles 40 advantageously extend through the membranes of thetooth 44 andtab 42, thereby locking these components together. Separation of the shingle components thus depends solely upon therivets 60, rather than upon the asphalt tar, which has a relatively low melting temperature. Testing conducted by the inventor has shown the durability of thepresent shingles 40 and the ability of therivets 60 to hold thetooth 44 andtab 42 together. In one test, one of thepresent shingles 40 was suspended from itstooth 44, such that thetab 42 hung freely and would have separated from thetooth 44 had it not been for therivet 60 holding the two portions together. Theshingle 40 was then placed in an oven set at about 120° F. The temperature was increased about 10° F. every hour until thetab 42 separated from thetooth 44 and dropped off. The goal was to see if therivet 60 could hold the two portions together up to a temperature of about 220° F. When the oven temperature reached about 315° F., the test was stopped. Therivet 60 still firmly held thetooth 44 andtab 42 together. By contrast, aprior art shingle 20 with norivet 60 subjected to the same test failed at about 160° F. - During testing of the
present shingle 40, large amounts of the sticky substance melted and dropped away. However, because therivet 60 engaged the more heat-resistant membranes of theshingle 40, melting of the sticky substance did not affect the grip of therivet 60 on thetooth 44 or thetab 42. Because therivet 60 firmly secures thetooth 44 and thetab 42 to one another, it is unnecessary to penetrate the overlappingregion 56 with a fastening member (such as a nail or a staple) when theshingles 40 are installed atop a roof. Withprior art shingles 20 it was advantageous to drive the fastening member through the overlappingregion 36 and into the roof so that the fastening member would supplement the adhesive and more firmly secure thattooth 24 andtab 22 to one another. However, with thepresent shingles 40 the fastening member may be driven only through thetooth 24 or thetab 42 without affecting the expected lifespan of theshingle 40. Therivets 60 alone securely hold thetooth 44 and thetab 42 together without the need for any additional fastening members. -
FIG. 13 illustrates another embodiment ofapparatus 100 and methods for producing thepresent shingles 40. Again, theapparatus 100 may be self contained, or it may be just one aspect of a larger apparatus (not shown) for producingshingles 40. In either case, at the right-hand side ofFIG. 13 , acontinuous strip 72 ofshingles 40 enters the apparatus. Thestrip 72 may pass through a pair ofrollers 74 before being fed onto, and passing over the top of, anouter drum 102. After passing over theouter drum 102, thestrip 72 may pass through another pair ofrollers 74. Guides (not shown) may ensure that thestrip 72 is positioned correctly along a longitudinal axis of thedrum 102. - First and
second drums outer drum 102. In the illustrated embodiment, thefirst drum 104 is positioned at approximately 3 o'clock on theouter drum 102, and thesecond drum 106 is positioned at approximately 12 o'clock on theouter drum 102. However, those of ordinary skill in the art will appreciate that the first andsecond drums outer drum 102, and that the first andsecond drums outer drum 102. - The
first drum 104 includes puncturing apparatus (not shown), and is similar in configuration to thefirst drum 76 described above. Thesecond drum 106 includes injecting apparatus (not shown), and is similar in configuration to thesecond drum 80 described above.Outer surfaces second drums inner surface 112 of theouter drum 102. Thedrums drums outer surfaces second drums inner surface 112 of theouter drum 102. - The
outer drum 102 includes a plurality of holes (not shown) in its surface. In one embodiment, the holes are evenly spaced around the circumference of thedrum 102. The holes align with the puncturing apparatus and the injecting apparatus on the first andsecond drums drums apparatus 70 and methods illustrated inFIG. 6 take place at the surface of theouter drum 102 as thestrip 72 passes over thedrum 102. -
FIG. 14 illustrates an alternative embodiment ofapparatus 120 for performing puncturing and injecting steps. In the illustrated embodiment, the puncturing and injecting tools comprise asingle apparatus 120. Theapparatus 120 includes aninjection nozzle 122. Alumen 124 of theinjection nozzle 122 houses apuncturing tool 126 that is selectively retractable. Theapparatus 120 may be positioned on the inside of adrum 128, similarly to the injectingapparatus 82 described above. As thestrip 72 passes over thedrum 128, thepuncturing tool 126 punctures thestrip 72 to produce ahole 130, and the injection nozzle subsequently injects liquefiedrivet 132 material into thehole 130. - The above presents a description of the best mode contemplated for carrying out the present shingles and methods of producing shingles, and of the manner and process of making and using them, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which they pertain to make and use these shingles and methods. These shingles and methods are, however, susceptible to modifications and alternate constructions from those discussed above that are fully equivalent. Consequently, these shingles and methods are not limited to the particular embodiments disclosed. On the contrary, these shingles and methods cover all modifications and alternate constructions coming within the spirit and scope of the shingles and methods as generally expressed by the following claims, which particularly point out and distinctly claim the subject matter of the shingles and methods.
Claims (23)
1. A shingle adapted to be secured to a rooftop to prevent moisture from penetrating the rooftop, comprising:
a first portion;
a second portion partially overlapping the first portion, thereby defining an overlapping region;
at least one aperture extending through both portions in the overlapping region; and
a fastening member extending through the at least one aperture.
2. The shingle of claim 1 , wherein the at least one fastening member comprises spaced end portions that abut an upper surface and a lower surface, respectively, of the shingle.
3. The shingle of claim 2 , wherein the at least one fastening member comprises a shaft portion that connects the spaced end portions.
4. The shingle of claim 1 , wherein the at least one fastening member comprises a plastic, a nylon, a polyester, a polymer material, a polypropylene, a metal, a metal alloy, a non-metal alloy, a fiberglass or an injectable adhesive.
5. The shingle of claim 1 , wherein the first and second portions each comprise a membrane with a sticky substance covering at least a significant portion of an upper surface thereof, and a particulate substance covering at least a significant portion of the sticky substance.
6. The shingle of claim 5 , wherein the membrane comprises fiberglass.
7. The shingle of claim 5 , wherein the sticky substance comprises asphalt tar.
8. The shingle of claim 5 , wherein the particulate substance comprises sand.
9. Apparatus for producing shingles, comprising:
a strip of shingles;
a first drum including puncturing apparatus; and
a second drum including injecting apparatus, the second drum being spaced from the first drum and positioned such that longitudinal axes of the drums are substantially parallel;
wherein the drums are adapted to contact the strip along an outer surface or outer surfaces thereof.
10. The apparatus of claim 9 , wherein the puncturing apparatus comprises at least one spike, or at least one water jet, or at least one air jet or at least one laser cutter.
11. The apparatus of claim 9 , wherein the injecting apparatus comprises at least one nozzle adapted to dispense a liquefied material.
12. The apparatus of claim 9 , further comprising a pair of pinch rollers adapted to receive the strip therebetween.
13. A method of producing shingles, the method comprising the steps of:
providing at least one shingle having a tab portion, a tooth portion and an overlapping region in which the tab portion and tooth portion overlap;
puncturing the at least one shingle in the overlapping region to produce an aperture; and
inserting a fastening member into the aperture to secure the tab portion to the tooth portion.
14. The method of claim 13 , wherein during the puncturing step the at least one shingle passes over a substantially cylindrical drum.
15. The method of claim 14 , wherein the drum includes puncturing apparatus.
16. The method of claim 15 , wherein the puncturing apparatus comprises at least one spike, or at least one water jet, or at least one air jet or at least one laser cutter.
17. The method of claim 13 , wherein during the inserting step the at least one shingle passes over a substantially cylindrical drum.
18. The method of claim 17 , wherein the drum includes injecting apparatus.
19. The method of claim 18 , wherein the injecting apparatus comprises at least one nozzle adapted to dispense a liquefied material.
20. The method of claim 18 , wherein the injecting apparatus injects a liquefied material into the aperture, and the liquefied material hardens to form a fastening member.
21. The method of claim 20 , wherein the liquefied material comprises a plastic, a nylon, a polyester, a polymer material, a polypropylene, a metal, a metal alloy, a non-metal alloy, a fiberglass or an injectable adhesive.
22. The method of claim 13 , further comprising the step of flattening end portions of the fastening member.
23. Apparatus for producing shingles, comprising:
a strip of shingles;
an outer drum;
a first drum including puncturing apparatus; and
a second drum including injecting apparatus, the second drum being spaced from the first drum and positioned such that longitudinal axes of the drums are substantially parallel;
wherein the outer drum is adapted to contact the strip along an outer surface thereof, the first drum is adapted to puncture the strip as it passes by the outer drum, and the second drum is adapted to inject a fastening member into the strip as it passes by the outer drum.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/088,450 US20060213143A1 (en) | 2005-03-24 | 2005-03-24 | Shingles and methods of producing shingles |
US11/941,885 US20080060307A1 (en) | 2005-03-24 | 2007-11-16 | Shingles and methods of producing shingles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/088,450 US20060213143A1 (en) | 2005-03-24 | 2005-03-24 | Shingles and methods of producing shingles |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/941,885 Division US20080060307A1 (en) | 2005-03-24 | 2007-11-16 | Shingles and methods of producing shingles |
Publications (1)
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US20060213143A1 true US20060213143A1 (en) | 2006-09-28 |
Family
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US11/088,450 Abandoned US20060213143A1 (en) | 2005-03-24 | 2005-03-24 | Shingles and methods of producing shingles |
US11/941,885 Abandoned US20080060307A1 (en) | 2005-03-24 | 2007-11-16 | Shingles and methods of producing shingles |
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Application Number | Title | Priority Date | Filing Date |
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US11/941,885 Abandoned US20080060307A1 (en) | 2005-03-24 | 2007-11-16 | Shingles and methods of producing shingles |
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US (2) | US20060213143A1 (en) |
Cited By (1)
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---|---|---|---|---|
US10829936B2 (en) | 2016-09-28 | 2020-11-10 | Owens Corning Intellectual Capital, Llc | Hip and ridge shingle |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US8458978B2 (en) * | 2004-08-04 | 2013-06-11 | Georgia Foam, Inc. | Reinforced sidings |
WO2012040103A1 (en) * | 2010-09-20 | 2012-03-29 | Thompson Michael J | Roofing system and method thereof |
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---|---|---|---|---|
US10829936B2 (en) | 2016-09-28 | 2020-11-10 | Owens Corning Intellectual Capital, Llc | Hip and ridge shingle |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: SOUTHERN FASTENING SYSTEMS, INC., ALABAMA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MCINTYRE, DAN;REEL/FRAME:016417/0469 Effective date: 20050316 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |