Abstract: A football bladder includes an oval body and multiple ribs formed on an outer periphery of the oval body. After a skin is attached to the outer periphery of the oval body, protruding strips are formed on an outer periphery of the skin.

Abstract: A ball structure includes a bladder and multiple outer layers attached to an outer periphery of the bladder. The bladder has multiple dimples defined in an outer periphery thereof so that after the outer layers are attached to the outer periphery of the bladder, the dimples appear on the outer layers.

Abstract: A ball includes multiple cover panels respectively multiple ribs protruded on a bladder carcass so as to define a panel recess between two adjacent ribs. Each rib has a first step and a second step respectively formed on a side face of the rib such that a first receiving space to receive therein the cushion and a second receiving space in communication with the first receiving space to receive therein the cover panel are defined between the two adjacent ribs. Engagement of the cushion and the cover panel to the bladder carcass is enhanced.

Abstract: A cover panel structure for making a ball surface includes multiple secondary pieces of different shapes and dimensions to be combined together to form an oval shape.

Abstract: A method for manufacturing an inflatable ball has the following acts of: obtaining an inflatable bladder with a winding layer; coating thermoplastic glue on the winding layer; obtaining multiple thickened panels; coating thermoplastic glue on the thickened panels; arranging the thickened panels and the inflatable bladder inside a mold; and injecting thermal air into the inflatable bladder to make the winding layer combine with the multiple thickened panels. Wherein, each thickened panel is made of a leather layer and an optional filling layer and has a thickened middle area and multiple thinned edges around the thickened middle area. By eliminating the rubber layer in the prior arts, vulcanization is avoided. Moreover, heating the inflatable ball from inside of the mold avoids thermal deformation of outer pebbled patterns of the panels.

Abstract: A method for manufacturing an inflatable ball has the following acts of: obtaining an inflatable bladder with a winding layer; coating thermoplastic glue on the winding layer; obtaining multiple thickened panels; coating thermoplastic glue on the thickened panels; arranging the thickened panels and the inflatable bladder inside a mold; and injecting thermal air into the inflatable bladder to make the winding layer combine with the multiple thickened panels. Wherein, each thickened panel is made of a leather layer and an optional filling layer and has a thickened middle area and multiple thinned edges around the thickened middle area. By eliminating the rubber layer in the prior arts, vulcanization is avoided. Moreover, heating the inflatable ball from inside of the mold avoids thermal deformation of outer pebbled patterns of the panels.

Abstract: A basketball comprising an inner tube, a thread layer wound around said inner tube, a carcass adhere to said thread layer, the panel of cover adhered to the surface of carcass; wherein said carcass having longitudinally grooved partition ribs, on the surface of partition rib, providing the configuration which formed during the vulcanize process.

Abstract: In a method for manufacturing a basketball, a basketball semi-product that includes an inflated bladder and a winding layer surrounding the bladder is prepared. A large-area rubber sheet and a large-area polyurethane sheet are prepared, and are interconnected fixedly so as to form a two-layer sheet. The two-layer sheet is cut to form a plurality of cover panels, each of which includes a small-area rubber sheet and a small-area PU sheet that abut against each other. The cover panels are adhered to an outer surface of the winding layer so as to form a ball body which has an outer surface that is formed with a channel network among the cover panels. The ball body is subsequently vulcanized.