Metal working – Method of mechanical manufacture – Assembling or joining
Reexamination Certificate
2008-07-29
2008-07-29
Bryant, David P. (Department: 3726)
Metal working
Method of mechanical manufacture
Assembling or joining
C029S525020, C029S525110, C412S033000, C412S038000, C234S094000, C234S104000, C083S618000, C083S691000
Reexamination Certificate
active
07404246
ABSTRACT:
An improved manufacturing method for the hole-punching assembly of a hole-punching unit is disclosed. The method of the present invention comprises the following steps: (1) forming a plurality of aluminum balancing pieces with a rectangular shape by extrusion, and forming an indentation area on one side of each balancing piece; (2) forming an elongated slot by an application of stamping on the indentation area of each balancing piece; (3) obtaining a plurality of rectangular pieces (the number of which equals that of the balancing pieces), made of iron, and forming a row of holes by a single application of stamping on each rectangular piece; and (4) fitting each of the rectangular pieces onto the indentation area of a balancing piece, and connecting the balancing pieces together by screws or bolts. The manufacturing method can lower the production cost and simplify the production process of the hole-punching assembly.
REFERENCES:
patent: 6119555 (2000-09-01), DiMaria
patent: 6223636 (2001-05-01), LaPlante et al.
Bryant David P.
David Pai Chao-Chang
Pai Patent and Trademark Law Firm
Taousakis Alexander P
LandOfFree
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