Pebble cover for a sports ball
A leather-based cover material for an inflatable sports ball that consists of a composite of a thin external layer, a filler, and an internal liner. The thin external layer is dimpled by using positive/negative embossing plates to create pebble projections on an exterior side and voids on the other or interior side. The interior side is coated with a filler material that fills the voids. The cover material is completed by attaching a liner layer to the cured filler material.
1. A cover for a ball, comprising:
an external layer having a dimpled pattern that includes a pebble pattern comprising a plurality of exterior pebbles that project outwardly from an exterior side of the external layer and a plurality of interior dimple spaces defining a plurality of voids on an interior side of the external layer;
a liner layer inward of the external layer for providing a backing layer for the cover; and
a substrate layer that is elastic and impervious to moisture, the substrate layer being sandwiched between the external layer and the liner layer, with the substrate layer filling the voids defined by the interior dimple spaces, and further,
the external layer having an outer surface, an inner surface and a thickness separating the outer surface from the inner surface, with the exterior pebbles and interior dimple spaces each having a height that defines an alternating arrangement of peaks and valleys on both the outer and inner surfaces of the external layer, and with the height of the interior dimple spaces being above the height of the valleys on the outer surface of the external layer, in a manner so that the substrate layer fills the voids defined by the interior dimples spaces at a level that is above the outer surface of the valleys, to strengthen the external layer, and still further,
the external layer, the liner layer, and the substrate layer together creating the cover for the ball.
2. A ball, comprising:
a cover that includes:
an external layer having a dimpled pattern with interior dimple voids on an inside surface of the external layer;
a liner layer, inside of the external layer, for providing a backing layer for the cover; and
a substrate layer that is elastic and impervious to moisture, the substrate layer being sandwiched between the external layer and the liner layer, with the substrate layer filling the interior dimple voids, and further, the external layer having an outer surface, an inner surface and a thickness separating the outer surface from the inner surface, with the exterior pebbles and interior dimple spaces each having a height that defines an alternating arrangement of peaks and valleys on both the outer and inner surfaces of the external layer, and with the height of the interior dimple spaces being above the height of the valleys on the outer surface of the external layer, in a manner so that the substrate layer fills the voids defined by the interior dimples spaces at a level that is above the outer surface of the valleys, to strengthen the external layer, and still further, with the external layer, the liner layer, and the substrate layer together creating the ball's cover; and
a ball carcass, underneath the cover, the carcass including an inflatable bladder.