Patent ID: 8308246

Claim:
A method of manufacturing a toothbrush, comprising: producing a bundle of bristles, comprising: collecting a plurality of bristles substantially close together; fusing and subsequently hardening ends of the collected bristles to each other by cutting the ends of the collected bristles using a heated cutter to thus produce a bundle of bristles; and cutting the fused bundle of bristles into a plurality of smaller unit bundles of bristles having cross-sectional areas corresponding to sizes of setting holes of a head insert of a toothbrush; inserting parts of the unit bundles of bristles other than fused parts thereof into corresponding setting holes of the head insert such that the fused parts of the unit bundles of bristles are disposed on a lower surface of the head insert; adhering the fused parts of the unit bundles of bristles to the head insert; and coupling the head insert having the unit bundles of bristles adhered thereto to a head part of the toothbrush.