Patent ID: 9404275
Filing Date: 2016-08-02
CPC Classification: B65B,E04G

Claim Text:
1. A binding wire twisting apparatus for tying reinforcing bars, said apparatus comprising: (a) a wire feeding unit for selectively feeding a binding wire, said wire feeding unit having a first feeding mode in which said wire feeding unit feeds said binding wire and a second feeding mode in which said wire feeding unit does not feed said binding wire; (b) a motor for rotating a shaft of said apparatus, said shaft having a longitudinal axis of rotation; (c) first and second opposed fingers respectively having first and second distal tips fixedly spaced apart from each other by a gap; (d) a first grip piece having a first opening therethrough, said first opening being coaxial with said axis of said shaft and having a first gripping surface therearound; said first grip piece being mounted for rotation coaxial with said axis of said shaft; said first and second opposed fingers respectively having first and second opposed channels therein adapted for slidingly receiving said fed binding wire therewithin as a leading end of said fed binding wire is fed through said first opening, into said first channel of said first finger, then across said gap, then into a flared distal entrance of said second channel of said second finger, and then back through said first opening; said first channel having a pin transversely spanning a distal end of said first channel and said pin impacts the direction of said leading end of said fed binding wire into said flared distal entrance; (e) said shaft having a member coupled for mutual rotation with said shaft and mounted for longitudinal reciprocation with respect to said shaft from a first position to a second position; said member having a second grip piece having a second gripping surface adapted for grippingly entrapping ends of said fed binding wire between said second gripping surface and said first gripping surface with mutual rotation of said first and second grip pieces when said member is in said second position; (f) reciprocating means, operably coupled to said member, for reciprocating said member from said first position to said second position; (g) control means for selectively causing said reciprocating means to reciprocate said member from said first position to said second position and back; said control means including a target for being impacted by said leading end of said fed binding wire, thereby causing said control means to reciprocate said member from said first position to said second position; said first and second opposed channels being in fixed spaced-apart relationship with respect to each other.