Chemistry: electrical current producing apparatus – product – and – Having specified venting – feeding or circulation structure – Venting structure
Reexamination Certificate
2006-08-22
2006-08-22
Ruthkosky, Mark (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Having specified venting, feeding or circulation structure
Venting structure
C429S166000, C429S179000, C429S229000, C429S224000
Reexamination Certificate
active
07094494
ABSTRACT:
An alkaline cell having a flat housing, preferably of cuboid shape. The cell can have an anode comprising zinc and a cathode comprising MnO2. The housing can have a relatively small overall thickness, typically between about 5 and 10 mm. Cell contents can be supplied through an open end in the housing and an end cap assembly inserted therein to seal the cell. The end cap assembly includes a vent mechanism which can activate, when gas pressure within the cell reaches a threshold level typically between about 100 and 300 psig (6.89×105and 20.69×105pascal gage). The cell can have primary and supplemental vent mechanisms such as welded or thinned regions on the surface of the housing which may activate at different pressure levels. The cathode can be formed of a plurality of stacked slabs having aligned hollow centers with an elongated opening for anode material to be inserted therein.
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Handbook of Batteries, Linden, D.R. 2nd., Chapter 34, 1995.
Anglin David
Ashbolt Mark
Bobowick Derek
Malgioglio Anthony
Merrill Brien
Josephs Barry D.
Krivulka Thomas G.
Ruthkosky Mark
The Gillette Company
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