Anvil for medical stapler

Abstract

[Problem] To rationalize production steps for a medical stapler. [Solution] An anvil (A): that forms a medical staple ( 3 ) supported in conjunction with a ram ( 5 ) in a medical stapler; sutures biological tissue; has dimensions corresponding to the formed peak section in the staple ( 3 ) after forming; and has a support section ( 11 ) that supports the crown ( 3 b ) of the staple ( 3 ), and a chamfered corner section ( 12 ) formed along both end sections in a direction along the crown ( 3 b ) of the staple ( 3 ) in the support section ( 11 ), which comes in contact with the crown ( 3 b ) when the supported staple ( 3 ) is formed and regulates a curved section thereof. The chamfered corner section ( 12 ) is cured by plastic working and formed.

We claim: 
     
         1 . An anvil for a medical stapler suturing body tissue by shaping, in cooperation with a ram of the medical stapler, a medical staple supported by the anvil, comprising:
 a supporting part with a dimension corresponding to a dimension of a shaped top part in the shaped medical staple, the supporting part supporting a middle part of the medical staple; and   a corner formed on both ends in a direction along the middle part of the medical staple on the supporting part, the corner contacting the middle part of the medical staple and defining a portion to be bent in shaping the supported medical staple, wherein   the corner is formed as a chamfered corner hardened by plastic working.   
     
     
         2 . The anvil for a medical stapler according to  claim 1 , wherein
 the supporting part is formed in cantilever fashion with a protruding dimension larger than a thickness of the middle part of the medical staple, and   the chamfered corner hardened by plastic working extends from a shaping position in the cantilevered supporting part at which the medical staple is shaped to a free end of the supporting part.