Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-11-15
2005-11-15
Cantelmo, Gregg (Department: 1745)
Metal working
Method of mechanical manufacture
Electrical device making
C429S053000, C429S056000
Reexamination Certificate
active
06964690
ABSTRACT:
A battery case (1) has a cutting groove (10) formed on its elongated side surface (1a). Between a groove bottom surface of the cutting groove (10) and an inner surface of the battery case (1) is provided a thin-walled easily-rupturable portion (12) designed to rupture at an instant when an internal pressure of the battery case (1) reaches a predetermined value. Thereby, a safety mechanism for use with a prismatic battery is realized. The manufacture of the safety mechanism is as follows. A cutting blade (37) rotated at a high speed by a high-speed rotary body (30) is brought into cutting engagement with the elongated side surface (1a) of the battery case (1) of the prismatic battery in finished form until it reaches a predetermined depth and is fixed, and subsequently the high-speed rotary body (30) or the prismatic battery is brought into rectilinear relative movement.
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Ebi Ryuichiro
Goda Yoshio
Makino Masanori
Tokumoto Tadahiro
Ueda Tomomichi
Cantelmo Gregg
Jordan and Hamburg LLP
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