Roofing shingle

• US 5,094,058 A
• Filed: 08/08/1989
• Issued: 03/10/1992
• Est. Priority Date: 04/01/1988
• Status: Expired due to Fees

• Current Assignee: Donald H. Slocum
• Original Assignee: Donald H. Slocum
• Inventors: Slocum, Donald H.
• Primary Examiner(s): Scherbel, David A.
• Assistant Examiner(s): Mai, Lan
• Application Number:
  US07/391,652
• Time in Patent Office: 945 Days
• Field of Search: 264/148, 264/171, 264/131, 264/132, 264/133, 264/102, 423/812, 52/537, 52/533, 52/520, 52/534, 52/536, 52/518, 52/DIG. 9, 52/553, 52/554, 52/560
• US Class Current: 52/533
• CPC Class Codes: B29C 2793/009 after shaping
• CPC Class Codes: B29C 43/222 characterised by the shape of the surface
• CPC Class Codes: B29C 48/00 Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor extrusion blow-moulding B29C49/04
• CPC Class Codes: B29C 48/001 Combinations of extrusion moulding with other shaping operations
• CPC Class Codes: B29C 48/0011 combined with compression moulding
• CPC Class Codes: B29C 48/0019 combined with shaping by flattening, folding or bending
• CPC Class Codes: B29C 48/002 combined with surface shaping
• CPC Class Codes: B29C 48/0022 combined with cutting
• CPC Class Codes: B29C 48/07 Flat, e.g. panels
• CPC Class Codes: B29C 48/12 Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
• CPC Class Codes: B29C 48/13 Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
• CPC Class Codes: B29C 48/15 incorporating preformed parts or layers, e.g. extrusion moulding around inserts
• CPC Class Codes: B29C 48/16 Articles comprising two or more components, e.g. co-extruded layers
• CPC Class Codes: B29C 48/22 with means connecting the layers, e.g. tie layers or undercuts
• CPC Class Codes: B29L 2031/722 Decorative or ornamental articles
• CPC Class Codes: B44F 9/02 wood grain effects
• CPC Class Codes: B44F 9/04 of stone surfaces, e.g. marble
• CPC Class Codes: E04D 1/265 the roofing elements being rigid, e.g. made of metal, wood or concrete
• CPC Class Codes: E04D 1/2916 the fastening means taking hold directly on adjacent elements of the same row
• CPC Class Codes: E04D 2001/005 the roofing elements having a granulated surface

Abstract

The improved roofing shingle has a body portion of generally flat, four-sided polygonal configuration and relatively thin in thickness. The body portion is provided with a plurality of irregular corrugations or otherwise deformed to give the roofing shingle the appearance of natural wood or other natural material such as slate. The body portion has a channel formed in the under surface so that the upper surface forms a ridge extending substantially parallel to the upper edge of the body portion. The body portion is also provided adjacent each of the opposite side or vertical edges with raised portions which are so shaped and dimensioned as to have one raised portion nest within the raised portion of a next adjacent like roofing shingle. The ridge and nested raised portions forming barriers to water infiltration between the overlapping shingles.

Claims

1. A roofing shingle to be used in conjunction with other like shingles comprises:

a) a body portion of substantially planar, rectangular configuration, relatively thin in thickness and having a top and bottom surface and upper, lower and opposite side edges, said body portion being formed of fibrous filler and plastic;

b) the body portion being provided with a plurality of corrugations of irregular size in depth, width and length and randomly arranged between said opposite side edges to simulate the texture of natural material;

c) each of the corrugations extend from the lower edge substantially parallel to the opposite side edges and terminating at points spaced from the upper edge so that the top and bottom surfaces have substantially flat surface areas extending between the opposite side edges and the upper edge portion and the points of termination of the corrugations;

d) a channel in the flat area of the bottom surface and extending between the opposite side edges and substantially parallel to the upper edge to thereby form in the flat area of the top surface a continuous ridge portion for blocking the flow of water along the top surface of the roof shingle to the upper edge of the roof shingle;

e) the corrugations next adjacent each of the opposite side edges are contoured and dimensioned so as to nest with the corrugation next adjacent each of the opposite side edges of the next adjacent alike roofing shingle;

f) the shingle is so contoured and dimensioned as to have an up-turned lip portion adjacent the corrugation next adjacent said opposite side edge which nests within the corrugation of the next adjacent like roof shingle and the roof shingle being contoured and dimensioned to provide a corrugation with which the up-turned lip portion nests.

2. The roofing shingle according to claim 1, wherein granules of water-resistant and fire-proof material are embedded in said body portion.

3. A roofing shingle to be used in conjunction with other like shingles formed by the steps of:

continuously feeding a ground fibrous filler and plastic material into an extruder wherein said fibrous filler and plastic material are mixed under pressure into a homogeneous mixture and discharged in the form of a continuously moving flat sheet;

continuously depositing on the top surface of the continuously moving flat sheet granules of wear resistant and fire-proof material;

conducting the flat sheet between two interfitting contour rollers to impress the granules and impart to the granules and to the flat sheet an irregular textured configuration and to form a first corrugation and second corrugation on side edges, the corrugations being dimensioned such that adjacent first and second corrugations nest one within the other, an upturned lip portion being formed adjacent said first corrugation and an upturned lip receiving portion being formed adjacent said second corrugation for defining a water dam when the first and second corrugations nest on within the other; and

,

subsequently continuously cutting the contoured sheet at predetermined intervals to provide roofing shingles of a selected size.